Journal of Vinyl and Additive Technology最新文献

{"title":"A comparative study on the mechanical and flammability properties of aluminum hydroxide and hollow glass beads‐filled polypropylene composites","authors":"Yitao Zheng, Fu Gu, Zheng Wang, Yun Zhou, Liqiang Xu, Philip Hall","doi":"10.1002/vnl.22164","DOIUrl":"https://doi.org/10.1002/vnl.22164","url":null,"abstract":"<jats:label/>Lightweight polypropylene (PP) composites with high flame retardancy and high thermal stability were required for automobile, electrical and electronic applications. Aluminum hydroxide (Al(OH)<jats:sub>3</jats:sub>) and two hollow glass beads (HGB) were selected as fillers for polypropylene composite fabrication. The incorporation of 10 wt% HGB (iM30K) into the PP matrix leads to a 3.5% density reduction, and 10 wt% Al(OH)<jats:sub>3</jats:sub> increased the density by 5.4%. The cone calorimeter test (CCT) showed the lowest PHRR of 536.6 kW/m<jats:sup>2</jats:sup> and peak smoke production rate of 0.061 m<jats:sup>2</jats:sup>/s was recorded for 10 wt% HGB (iM30K) loading. The formulation with 10 wt% Al(OH)<jats:sub>3</jats:sub> loading had the lowest flammability; however, the Al(OH)<jats:sub>3</jats:sub> content was not sufficient for a consistent flame‐resistant performance. The incorporation of HGB and Al(OH)<jats:sub>3</jats:sub> resulted in an enhancement of both tensile and flexural modulus; however, it was observed that the tensile, flexural, and impact strengths exhibited a decrement with an increase in the concentration of HGB or Al(OH)<jats:sub>3</jats:sub>. Moreover, the thermogravimetric analysis (TGA) results indicated that at the same filler content, HGB (S60HS) filled PP composites have the highest thermal stability among the prepared composites.Highlights<jats:list list-type=\"bullet\"> <jats:list-item>Effects of HGB and Al(OH)<jats:sub>3</jats:sub> on flame retardancy and thermal stability of PP.</jats:list-item> <jats:list-item>Small size HGB (iM30K) exhibited superior smoke suppression performance.</jats:list-item> <jats:list-item>Effects of HGB on density reduction of PP based composites.</jats:list-item> <jats:list-item>Mechanical properties of HGB or Al(OH)<jats:sub>3</jats:sub> filled PP were investigated.</jats:list-item> <jats:list-item>The SEM images revealed the breakage and dispersion of HGB in the composites.</jats:list-item> </jats:list>","PeriodicalId":17473,"journal":{"name":"Journal of Vinyl and Additive Technology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142263976","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Development of multilayer composite film based on protein‐polysaccharides with the addition of onion waste extracts and their impact on the shallot quality","authors":"P. Thivya, N. Bhanu Prakash Reddy, V. R. Sinija","doi":"10.1002/vnl.22163","DOIUrl":"https://doi.org/10.1002/vnl.22163","url":null,"abstract":"<jats:label/>At present, multilayer composite film is attractive in the production of biodegradable films due to its essential film properties. The current study mainly focused on overcoming the problems of poor water barrier and mechanical strength observed in monolayer films (SA‐CMC and G/SA‐CMC) made from gluten (G), sodium alginate (SA), and carboxymethylcellulose (CMC). The film was developed with the addition of onion waste extracts (OWEs), primarily from peel and stalk, to enhance functional properties. The multilayer composite film consists of three layers: an outer layer made of G, an inner layer made of SA, CMC, and a middle layer made of G/SA‐CMC. The developed composite film exhibited improved physical properties (thickness: 0.348–0.629 mm and moisture: 20.889%–21.403%), mechanical properties (tensile strength: 21.943–20.640 MPa), and barrier properties (WVP: 0.212–0.516 g/<jats:ext-link xmlns:xlink=\"http://www.w3.org/1999/xlink\" xlink:href=\"http://m.s.pa\">m.s.Pa</jats:ext-link> × 10<jats:sup>−14</jats:sup>) compared to monolayer films (SA‐CMC and G/SA‐CMC). The addition of OWEs enhanced the multilayer film's phenolic (20.076 and 36.175 mgGAE/g) and antioxidant activity (73.850% and 42.667%). The study found that the multilayer control film had minimal changes in weight loss (9.75% ± 0.18%) and firmness (6.68 ± 0.64 N) compared to OWEs‐added films (9.93% ± 0.49–10.02% ± 0.14% and 6.61 ± 0.37 to 6.64 ± 0.18 N). However, fresh‐peeled shallot onion packed with control film exhibited higher bacterial counts (6.70 ± 0.42 CFU/g) and yeast and mold counts (5.08 ± 0.20 CFU/g) than those packed with the OWEs‐added film (6.49 ± 0.28–6.56 ± 0.27 CFU/g and 4.75 ± 0.18–4.89 ± 0.21 CFU/g), indicating that OWEs protect the onions from microbial degradation. Overall, the multilayer control film (without OWEs) showed better results for storing the fresh‐peeled shallot onion at 4°C for 21 days.Highlights<jats:list list-type=\"bullet\"> <jats:list-item>Onion waste extracts have potent high antioxidant and antimicrobial properties</jats:list-item> <jats:list-item>Multilayer film's physical, mechanical, barrier, and functional properties improved</jats:list-item> <jats:list-item>Addition of onion waste extracts increased the film's antimicrobial activity</jats:list-item> <jats:list-item>Control film showed a better effect for storing fresh‐peeled shallot onion</jats:list-item> <jats:list-item>Developed film can store fresh‐peeled shallot onion for 21 days at 4°C.</jats:list-item> </jats:list>","PeriodicalId":17473,"journal":{"name":"Journal of Vinyl and Additive Technology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142216049","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Short carbon fiber reinforced poly(lactic acid) and its thermoplastic polyurethane blends: The effect of carbon fiber, polyurethane, and compatibilizer amounts","authors":"Çağrıalp Arslan, Ayşegül Erdem, Özkan Özmen, Ümit Tayfun, Mehmet Doğan","doi":"10.1002/vnl.22160","DOIUrl":"https://doi.org/10.1002/vnl.22160","url":null,"abstract":"<jats:label/>Lightweight and multifunctional carbon fiber‐reinforced composites with low production costs are crucial for aerospace and logistics applications. In this study, the integration of compatibilizer to polylactic acid (PLA)/thermoplastic polyurethane (TPU) blends filled with carbon fiber (CF) is performed due to cost‐lowering, besides enhanced mechanical performance and processability. Composite sample loaded with 30% CF is selected and optimized by the varied amount of polymeric MDI (pM) inclusions. As the tensile resistance of PLA/TPU/30CF and PLA/TPU/30CF/pM is compared, it is found that pM additions led to enhancements in tensile strength and tensile modulus. A total of 5% of pM inclusion results in 43% increament in tensile strength of the tensile strength of PLA/TPU/30CF. Similarly, the flexural modulus and flexural strength of composites are improved by a high amount of pM. The impact resistance of PLA significantly increases after CF inclusion. The incorporation of TPU and compatibilizer shifts impact strength to higher levels. 204% improvement is achieved for PLA/TPU blend involving 5 wt% of pM concerning unfilled PLA. According to the thermo‐mechanical analysis of composites, the presence of pM yields a higher elastic modulus for PLA/TPU/CF composites. Additionally, reductions in the glass transition temperature of PLA and composites are observed since the polymer gains ductility by elastomer and compatibilizer inclusions. Scanning electron microscopy (SEM) investigations of composites visualize these findings. Results postulated that pM integration can be utilized in large‐scale production of CF‐reinforced PLA‐TPU blend systems for cost reduction and performance improvement of composite parts in logistics and aerospace applications.Highlights<jats:list list-type=\"bullet\"> <jats:list-item>The compatibilizing effect of pMDI on the PLA/TPU/CF blend system is investigated.</jats:list-item> <jats:list-item>pMDI inclusions yield improvement in the mechanical resistance of composites.</jats:list-item> <jats:list-item>CF‐reinforced PLA/TPU composites gain ductile behavior by the addition of TPU.</jats:list-item> <jats:list-item>The increase in elastic modulus ensures an efficient enhancement of compatibility.</jats:list-item> </jats:list>","PeriodicalId":17473,"journal":{"name":"Journal of Vinyl and Additive Technology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-09-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142216045","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Synergistic effects of epoxidized isosorbide linolenate (EGLA‐ISB): A novel bio‐based heat stabilizer for enhanced mechanical and thermal performance of PVC","authors":"Yu Han, Wei Luo, Shiyan Sun, Yunxuan Weng, Caili Zhang","doi":"10.1002/vnl.22161","DOIUrl":"https://doi.org/10.1002/vnl.22161","url":null,"abstract":"<jats:label/>Heat stabilizers are additives that are used to stabilize the chemical and physical properties of poly(vinyl chloride) (PVC) during high temperature processing and use. It is able to resist thermal degradation, prevent color change, maintain mechanical properties, and eliminate acid gas (HCl). Organometallic salts, such as zinc stearate (ZnSt<jats:sub>2</jats:sub>) and calcium stearate (CaSt<jats:sub>2</jats:sub>), are commonly used as heat stabilizers. There are not as many reports on bio‐based heat stabilizers. The effectiveness of a synthetic bio‐based molecule, epoxidized isosorbide linolenate (EGLA‐ISB), as a heat stabilizer for PVC was investigated in this article, and its performance was compared to the commonly used CaSt<jats:sub>2</jats:sub>/ZnSt<jats:sub>2</jats:sub> heat stabilizers. The thermal stability of PVC films was observed to be higher when EGLA‐ISB was combined with epoxidized soybean oil (ESO) as the plasticizer. The PVC/30ESO/2EGLB‐ISB sample exhibited an initial decomposition temperature of 283.8°C and a minimal mass loss of 0.3% after a 120‐minute isothermal heat loss test at 200°C, indicating improved thermal stability. The incorporation of EGLA‐ISB into PVC films enhances mechanical properties through synergistic plasticization and stabilization, addressing the dispersibility issues of CaSt<jats:sub>2</jats:sub>/ZnSt<jats:sub>2</jats:sub> that can diminish PVC's strength. The optical properties of PVC samples incorporating EGLA‐ISB are also superior. The plastics industry can move toward a more environmentally friendly and sustainable direction through the development of bio‐based heat stabilizers.Highlights<jats:list list-type=\"bullet\"> <jats:list-item>EGLA‐ISB/ESO boosts PVC thermal stability.</jats:list-item> <jats:list-item>EGLA‐ISB enhances PVC's mechanical properties.</jats:list-item> <jats:list-item>EGLA‐ISB PVC shows superior optical performance.</jats:list-item> <jats:list-item>EGLA‐ISB advances sustainable PVC industry.</jats:list-item> </jats:list>","PeriodicalId":17473,"journal":{"name":"Journal of Vinyl and Additive Technology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142216047","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effects of spherical fillers reinforcement on the efficacy of thermal conductivity in epoxy and polyester matrices: Experimental validation and prediction using finite element method","authors":"Priyabrat Pradhan, Abhilash Purohit, Hemalata Jena, Jayashree Singh, Bibhuti Bhusan Sahoo","doi":"10.1002/vnl.22159","DOIUrl":"https://doi.org/10.1002/vnl.22159","url":null,"abstract":"<jats:label/>The creation of a theoretical heat conduction model for polymers embedded with spherical inclusions is described in this study. It also contains the experimental confirmation of the suggested correlation for utilizing the model to estimate the effective thermal conductivity (<jats:italic>K</jats:italic>) of such composites. According to ASTM‐E‐1530, composites are made with varying amounts of aluminium oxide and pine wood dust reinforced in polyester resin. The effective thermal conductivities (<jats:italic>K</jats:italic><jats:sub>eff</jats:sub>) of the composites are then determined using the Unitherm TM model 2022. Ansys 19.R2 software is used to evaluate the effective thermal conductivity of these composites with a uniform filler distribution, while Digimat‐FE software is used determine the thermal conductivity values of such particle filled polymer composites with a random filler distribution. After comparison and validation with experimental data, these values are shown to be fairly good agreement with the theoretical values from the suggested correlation. The investigation is further expanded to determine the thermal conductivities for epoxy composites using wood apple shell dust and coir dust particle. Also epoxy and polyester composites reinforced with SiO<jats:sub>2</jats:sub> and TiO<jats:sub>2</jats:sub> have been investigated in the similar manner. The main thrust of this report to validate the numerical results of composites by varying numerous polymers. The thermal conductivity all the composites grow monotonically with increase in filler content. The thermal conductivity of silicon dioxide, titanium oxide, and aluminium oxide filled epoxy composites is measured as 1.5, 7, and 35 W/m‐K respectively.Highlights<jats:list list-type=\"bullet\"> <jats:list-item>In this study spherical fillers are successfully used as a potential filler material in polyester composites</jats:list-item> <jats:list-item>The thermal conductivity predicted by proposed mathematical model of polyester is validated with measured value and found better agreement.</jats:list-item> <jats:list-item>The Ansys 19.R2 and digimat software are used to predict the thermal conductivity values of these composites.</jats:list-item> <jats:list-item>The mathematical model is further used to predict thermal conductivity of epoxy composites to check the accuracy of the model.</jats:list-item> </jats:list>","PeriodicalId":17473,"journal":{"name":"Journal of Vinyl and Additive Technology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-09-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142216048","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effect of different IFS (MWCNTs, BN, and ZnO) on flame retardant, thermal and mechanical properties of PA6/aluminum diisobutyl phosphinate composites","authors":"Songjiang Xu, Yushu Xiang, Xuanying Huan, Qiu Xu, Shikai Ma, Dongmei Bao, Shuhao Qin, Daohai Zhang, Haijun Du","doi":"10.1002/vnl.22141","DOIUrl":"https://doi.org/10.1002/vnl.22141","url":null,"abstract":"<jats:label/>In this paper, the effects of the synergistic flame retardation of aluminum diisobutyl phosphinate acid (APBA) with three inorganic fillers of different dimensions (multi‐walled carbon nanotubes [MWCNTs] [1‐dimensional], hexagonal boron nitride [BN] [2‐dimensional], and zinc oxide [ZnO] [3‐dimensional]), respectively, on the properties of nylon 6 (polyamide 6 [PA6]) materials were investigated. It was shown that under the same additive amount, with the increase of spatial dimension of inorganic fillers, the thermal stability and residual carbon capacity were improved. Which would catalyze the formation of more and denser carbon layers in the matrix material, effectively blocked the transfer of oxygen and heat, enhanced the cohesive‐phase flame retardancy of synergistic flame‐retardant PA6 composites, and exerted a better synergistic flame‐retardant effect with APBA. So that the flame‐retardant properties of PA6 composites were gradually improved, and the mechanical properties were also gradually increased. The comprehensive performance of three types of inorganic fillers gradually improves in the order of MWCNTs &lt; BN &lt; ZnO. When the addition amount of ZnO was 2 wt%, the vertical combustion grade (UL‐94) of PA6 composite was V‐0, and the limiting oxygen index (LOI) was as high as 36.5%. The tensile strain increased by 19.11% and impact strength increased by 20.26% compared with PA6, and PA6/APBA‐Zn can be used as a flame retardant PA6 composite material with balanced overall performance.Highlights<jats:list list-type=\"bullet\"> <jats:list-item>Diisobutylaluminium hypophosphite and inorganic fillers have efficient synergistic flame retardant effects in PA6.</jats:list-item> <jats:list-item>With the increase of spatial dimension of inorganic fillers, the better the synergistic flame retardant effect in PA6.</jats:list-item> <jats:list-item>The flame retardant can degrade to release the phosphorous free radicals.</jats:list-item> <jats:list-item>Inorganic fillers can cross‐link with the PA6 substrate and promote the charring.</jats:list-item> </jats:list>","PeriodicalId":17473,"journal":{"name":"Journal of Vinyl and Additive Technology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-08-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142216051","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Facile strategy for the synthesis of antimicrobial poly(vinyl chloride) functionalized with benzimidazole","authors":"Shaban A. Darwish, Reham A. Abdel‐Monem, Samira T. Rabie, Mohamed Azab El‐Liethy, Bahaa A. Hemdan, Samir T. Gaballah","doi":"10.1002/vnl.22158","DOIUrl":"https://doi.org/10.1002/vnl.22158","url":null,"abstract":"<jats:label/>Synthesizing antimicrobial materials is a viable approach to combating microbes and mitigating their detrimental consequences on public health and economic domains. Here, we aim to design and synthesize hybrid polymers composed of poly(vinyl chloride) (PVC) and benzimidazole derivatives, in addition to evaluating their antimicrobial efficacy. PVC was chemically functionalized affording 4 conjugates where the benzimidazole motif was incorporated indirectly into the PVC through a triazole ring combined with a short linker. This functionalized PVC was synthesized by employing Cu azide–alkyne cycloaddition (CuAAC) conditions (click chemistry). The second functionalized PVC was synthesized by a nucleophilic substitution reaction to give 5, which has a benzimidazole moiety attached directly to the PVC via a short spacer arm. The benzimidazole derivatives and the corresponding benzimidazole‐PVC conjugates were investigated by elemental analysis and spectroscopic techniques (IR, NMR, and MS) as needed, besides UV–vis spectroscopy, x‐ray diffraction (XRD), and scanning electron microscopy (SEM) and energy dispersive x‐ray spectroscopy (EDX) in the case of the polymeric conjugates. The SEM morphology demonstrated a change in the PVC surface after the modification, showing spongy structures. Furthermore, the chemical characterization using EDX revealed peaks representing C, O, and N, in addition to the characteristic Cl peaks. The benzimidazole derivatives and the corresponding functionalized PVC were evaluated as antimicrobial agents against a variety of Gram‐negative and Gram‐positive bacteria and fungi strains utilizing the well diffusion assay. The data revealed an improvement in the antimicrobial activity of the functionalized PVC (4) that contained triazolobenzimidazole against pathogenic <jats:italic>Escherichia coli</jats:italic> and <jats:italic>S. typhimurium</jats:italic>.Highlights<jats:list list-type=\"bullet\"> <jats:list-item>Microbes have negative impact on public health and economic domains</jats:list-item> <jats:list-item>Synthesizing antimicrobial materials is a viable approach to combating microbes</jats:list-item> <jats:list-item>We herein synthesized PVC/benzimidazole hybrid polymers</jats:list-item> <jats:list-item>Functionalized PVC was synthesized and characterized by IR, NMR, SEM and EDX</jats:list-item> <jats:list-item>PVC/benzimidazole hybrids were evaluated as antimicrobial agents.</jats:list-item> </jats:list>","PeriodicalId":17473,"journal":{"name":"Journal of Vinyl and Additive Technology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-08-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142216052","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Revealing the unique characteristics and strength of polycarbodiimide as an accelerator‐free crosslinker for low‐temperature processing of carboxylated nitrile butadiene rubber gloves for hand protection","authors":"Nadia Wan Azman, Masahiro Fujiwara, Norihide Enomoto, Azura A. Rashid","doi":"10.1002/vnl.22151","DOIUrl":"https://doi.org/10.1002/vnl.22151","url":null,"abstract":"<jats:label/>Carboxylated nitrile rubber (XNBR) gloves with sulfur crosslinked system consist of accelerators that pose a Type IV allergies problem with a risk to harm the health of the user. Alternative crosslinking system such as accelerator‐free (AF) crosslinker has been found and established to combat the health issues as replacement to the conventional crosslinker. This work emphasized the use of polycarbodiimide (PCDI) as a crosslinker, particularly PCDI with zinc oxide (ZnO) crosslink system. The effectiveness of PCDI as an AF crosslinker was compared with two conventional crosslink systems: sulfur with ZnO and ZnO only system. The swelling test results show the crosslink density of PCDI crosslink system achieved comparable value with conventional systems. It is expected that XNBR gloves with PCDI imposed superior mechanical and physical properties as sulfur system due to the formation of ionic crosslink resulting in much denser polymer network. The new PCDI crosslinker system offer cost reduction to gloves manufacturer as it can be cured at low temperatures from 60 to 80°C comparing to sulfur crosslinked system that normally cured at 140°C. PCDI offered a new generation of AF crosslinker in XNBR gloves with lower curing temperatures and to tackle health hazards, in place of the conventional crosslinker.Highlights<jats:list list-type=\"bullet\"> <jats:list-item>Emphasizes a significant change or improvement in the field of hand protection.</jats:list-item> <jats:list-item>Suggests that polycarbodiimide possesses distinctive qualities that set it apart from other materials.</jats:list-item> <jats:list-item>Highlights polycarbodiimide's effectiveness as a crosslinker without the need for accelerators, which are commonly used in rubber processing</jats:list-item> <jats:list-item>Indicates a novel approach to processing rubber gloves, potentially reducing energy consumption or enabling new applications.</jats:list-item> <jats:list-item>Specifies the type of gloves being discussed, indicating a focus on a specific material or product.</jats:list-item> </jats:list>","PeriodicalId":17473,"journal":{"name":"Journal of Vinyl and Additive Technology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-08-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142216053","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Electromagnetic interference shielding behavior of flexible PVA composite made using betel nut husk biocarbon and steel microwire in E, F, I, and J band spectrum","authors":"K. Somasundaram, G. S. Uthayakumar, B. R. Tapas Bapu, Muruganantham Ponnusamy","doi":"10.1002/vnl.22138","DOIUrl":"https://doi.org/10.1002/vnl.22138","url":null,"abstract":"<jats:label/>This study investigates the electromagnetic interference (EMI) shielding behavior of a flexible polyvinyl alcohol (PVA) composite fabricated using betel nut husk biocarbon and steel microwire in the E, F, I, and J band spectrum. The incorporation of steel microwire into the PVA based composite is novel approach since it provides flexibility along with good mechanical strength. The fabrication process involves the solution casting method, and the composite is characterized according to American society of testing and materials (ASTM) standards. The research focuses on analyzing dielectric behavior, EMI shielding effectiveness, and mechanical properties. Results indicates that, the composite with 5 vol.% of biocarbon and 5 vol.% of micro metal wire, exhibits exceptional relative permittivity of 7.6, 6.9, 6.3, and 1.5 for E, F, I, and J frequency bands and same composition delivers exceptional electromagnetic shielding with total shielding values of 17.7 dB, 25.5 dB, 31.7 dB, and 38.6 dB for E, F, I, and J frequency bands. In mechanical characteristics, composite with 5 vol.% of biocarbon and 5 vol.% of micro metal wire, exhibits high tensile strength of 73 MPa with lower elongation percentage of 109.2% and shore‐D hardness of 40, respectively. Thus, the inclusion of betel nut husk biocarbon and steel microwire into the PVA matrix enhanced the overall EMI shielding properties along with mechanical properties. These flexible EMI shielding composites could be used in applications such as defense, telecommunication, drones, and electronic gadget making segments.Highlights<jats:list list-type=\"bullet\"> <jats:list-item>Flexible polyvinyl alcohol (PVA) composite is made with steel microwire and betel nut husk biocarbon.</jats:list-item> <jats:list-item>Biocarbon is derived from betel nut husk for first time and used as EM wave absorber.</jats:list-item> <jats:list-item>Composites were made via simple solution casting method for high flexibility index.</jats:list-item> <jats:list-item>Composite contains 5 vol.% biocarbon and 5 vol.% micro metal wire, shows high relative permittivity 7.6 for E frequency bands.</jats:list-item> <jats:list-item>The composites have high tensile strength of 73 MPa with a low elongation percentage of 109.2% and a shore‐D hardness of 40.</jats:list-item> </jats:list>","PeriodicalId":17473,"journal":{"name":"Journal of Vinyl and Additive Technology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-08-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142216071","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Synthesis, mechanical, thermal, and fire properties of poly(vinyl chloride) modified with a new flame retardant based on zeolite and urea cyanurate","authors":"Mahroo Khaleghi, Iliya Eslami","doi":"10.1002/vnl.22157","DOIUrl":"https://doi.org/10.1002/vnl.22157","url":null,"abstract":"<jats:label/>In the article, polyvinyl chloride/zeolite 4A/urea cyanurate composites (P/UCA‐Zlt) were designed and prepared by a melt intercalation method suitable for the manufacture of rigid products. To determine the structure and properties of this flame‐retardant system, thermal, flame retardancy, and mechanical behavior were tested by Fourier transform infrared analysis (FTIR) spectroscopy, field emission scanning electron microscopy (FE‐SEM), thermogravimetric analysis (TGA/DTG), thermal stability test, cone calorimetric test (CCT), and tensile analysis. Results showed that the composites, based on UCA‐Zlt, exhibited better flame retardancy, better HCl scavenger properties, improved mechanical properties, and reduced level of degradation compared with the pure polyvinyl chloride (PVC) at the optimum modification UCA (3 wt%)–Zlt (1%). TGA, indicated that the stability against heat influences of PVC was increased by adding UCA–Zlt which was evident by the increased thermal decomposition temperature. The CCT results of the PVC composites increased flame‐retardant properties. The PVC matrix composites improved the thermal stability time of PVC as the optimum value of 1 wt%. Moreover, the tensile strength of the composite containing UCA (3 wt%)–Zlt (1%) increased by 19.8% compared with those of neat PVC.Highlights<jats:list list-type=\"bullet\"> <jats:list-item>A strategy to design an FR‐additive from zeolite and urea cyanurate for PVC.</jats:list-item> <jats:list-item>Introduce a guide suitable for the thermal stability of PVC formulation.</jats:list-item> <jats:list-item>Effects of zeolite on thermal stability and flame retardancy of PVC.</jats:list-item> <jats:list-item>Introducing an optimal FR‐PVC system with improved mechanical properties.</jats:list-item> </jats:list>","PeriodicalId":17473,"journal":{"name":"Journal of Vinyl and Additive Technology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-08-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142216055","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}