Journal of Vinyl & Additive Technology最新文献

{"title":"Insight into the diffusion behaviors of SBS-compatibilizer-coupled modified asphalt: Molecular dynamics simulation and experimental validation","authors":"Fuqiang Dong,&nbsp;Jinli Lu,&nbsp;Xin Yu,&nbsp;Peixing Yang,&nbsp;Yong Jin,&nbsp;Lei Wan,&nbsp;Yongling Ding,&nbsp;Haonan Chen","doi":"10.1002/vnl.22123","DOIUrl":"10.1002/vnl.22123","url":null,"abstract":"<div>\u0000 \u0000 \u0000 <section>\u0000 \u0000 <p>Compatibilizers play a crucial role in enhancing the compatibility between styrene–butadiene–styrene (SBS) polymer and asphalt, and the coupling of compatibilizers with SBS affects the motion behavior of asphalt molecules, which influences the performance of SBS modified asphalt. In this investigation, molecular dynamics simulation is employed to evaluate the impact of SBS coupling with compatibilizers on alterations in the self-motion behavior of asphalt molecules, changes in relative free volume, and modifications in system energy. The findings reveal that with the introduction of a compatibilizer, the combined effect of the compatibilizer and SBS coupling amplifies the mobility of the constituents within the modified asphalt. This amplification manifests as increased relative free volume within the system, heightened activation of modified asphalt molecules, and a simultaneous reduction in the interaction energy among these molecules. Following that, the high-temperature rheological properties of SBS modified asphalt were verified with the simulation results, coupled with temperature scanning experiments. This study describes the intrinsic mechanism of interaction of compatibilizers in SBS modified asphalt at the molecular scale.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Highlights</h3>\u0000 \u0000 <div>\u0000 <ul>\u0000 \u0000 <li>Molecular dynamics simulations and experimental validation were implemented for styrene–butadiene–styrene (SBS)-modified asphalt.</li>\u0000 \u0000 <li>Compatibilizers can activate the activity of SBS modified asphalt.</li>\u0000 \u0000 <li>Compatibilizers allow a better release of the properties of the bitumen and SBS.</li>\u0000 \u0000 <li>Compatibilizers can replace bitumen and act with SBS to improve its modification efficiency.</li>\u0000 \u0000 <li>The optimum dosage of compatibilizer is 3%.</li>\u0000 </ul>\u0000 </div>\u0000 </section>\u0000 </div>","PeriodicalId":17662,"journal":{"name":"Journal of Vinyl & Additive Technology","volume":"30 5","pages":"1270-1284"},"PeriodicalIF":3.8,"publicationDate":"2024-06-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141382301","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A self-assembled tannic acid-modified Zn-Al LDH supported Mg(OH)2 nanofiller for the preparation of bisphenol A based poly(amide-imide) nanocomposites","authors":"Mohsen Hajibeygi,&nbsp;Hesam Moradi","doi":"10.1002/vnl.22114","DOIUrl":"10.1002/vnl.22114","url":null,"abstract":"<div>\u0000 \u0000 \u0000 <section>\u0000 \u0000 <p>A multifunctional organic-inorganic nanofiller as a reinforcement of bisphenol A based poly(amide-imide) (BPAI) was assembled through the formation of electrostatic forces between tannic acid (TA)-modified Zn-Al LDH and Mg(OH)₂ nanoparticles (MDH). TA-modified MDH@Zn-Al LDH (TML) was fabricated using an in-situ, one-step co-precipitation method. This involved the growth of LDH layers in the TA/MDH suspension. The manner of surface modification and the placement of MDH along with LDH in the TML structure were confirmed using FTIR, XRD, FE-SEM, and TGA. The results exhibited that the modification has resulted in an intercalated structure with increased interlayer spacing of LDH. The Poly(amide-imide) nanocomposites were prepared by reinforcing BPAI with TML using the solution casting method. The best thermal stability of the nanocomposites, in both air and N₂ atmospheres, appeared in the sample with 2 wt% TML content. The <i>T</i>₁₀ and <i>T</i>_max values of this sample in the air atmosphere were found to be 45 and 37°C higher, respectively, than those of BPAI. Comparative to neat BPAI, the THR and HRC values of the mentioned sample were reduced by 43.6% and 45.7%, respectively. These results demonstrated the significant synergistic effect of the TML structure in enhancing the thermal and combustion resistance of BPAI.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Highlights</h3>\u0000 \u0000 <div>\u0000 <ul>\u0000 \u0000 <li>Preparation of LDH on a Mg(OH)₂/tannic acid as multifunctional nanofiller.</li>\u0000 \u0000 <li>Self-assembling nanofiller including tannic acid-modified LDH-supported MDH.</li>\u0000 \u0000 <li>A synthesized bisphenol A based poly(amide-imide) (BPAI).</li>\u0000 \u0000 <li>Effect of the nanofiller on the thermal and combustion resistance of BPAI.</li>\u0000 </ul>\u0000 </div>\u0000 </section>\u0000 </div>","PeriodicalId":17662,"journal":{"name":"Journal of Vinyl & Additive Technology","volume":"30 5","pages":"1221-1240"},"PeriodicalIF":3.8,"publicationDate":"2024-05-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141191202","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Bio-based and effective: Cardanol-piperidine derivatives for enhanced polypropylene resistance against thermo- and photo-oxidative aging","authors":"Xuemei Zeng,&nbsp;Jianxiang Feng,&nbsp;Yulin He,&nbsp;Siyu Cao,&nbsp;Cheng Zhou,&nbsp;Kangqi Li,&nbsp;Jinjing Tan,&nbsp;Shuyi Chen,&nbsp;Yong Xia,&nbsp;Yuejun Liu,&nbsp;Pu Shi,&nbsp;Jin Zhu","doi":"10.1002/vnl.22113","DOIUrl":"10.1002/vnl.22113","url":null,"abstract":"<div>\u0000 \u0000 \u0000 <section>\u0000 \u0000 <p>Bio-based antioxidants have garnered attention for their sustainability and environmental benefits. In this study, we designed and synthesized three cardanol-piperidine derivatives (HSs) by utilizing hydrogenated cardanol (HC) and piperidine derivatives to improve the aging inhibition of polypropylene (PP). These bio-based antioxidants were intended as eco-friendly alternatives to conventional synthetic antioxidants. The impact of these HSs on the thermal stability, thermo-oxidative stability, and light stability of PP was thoroughly evaluated. The results unveiled that after 5 h of interaction with 2,2-diphenyl-1-picrylhydrazyl free radical, HSs exhibited a remarkable over 5-fold increase in free radical scavenging efficiency as compared to HC. Moreover, the addition of HSs significantly increased the oxidation induction time and the initial oxidation temperature compared to pristine PP. After photo-oxidative aging and thermo-oxidative aging, the HS-dosed PP demonstrated remarkable retention of elongation at break, reaching more than 72% and 69%. From the comparison with physical mixtures and the density functional theory calculations, an intramolecular synergism mechanism is proposed. The intramolecular synergism between hydrogenated cardanol and piperidine derivatives may be the main reason for the inhibition of PP aging.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Highlights</h3>\u0000 \u0000 <div>\u0000 <ul>\u0000 \u0000 <li>A method for constructing simultaneous efficient light, thermal, and oxygen stable polypropylene.</li>\u0000 \u0000 <li>The mechanism for achieving simultaneous stabilization of light, heat, and oxygen is the intramolecular synergy of phenol piperidine.</li>\u0000 \u0000 <li>The essence of intramolecular synergy of cardanol and piperidine derivatives is its' reduced hydrogen bond dissociation energy and energy gap.</li>\u0000 </ul>\u0000 </div>\u0000 </section>\u0000 </div>","PeriodicalId":17662,"journal":{"name":"Journal of Vinyl & Additive Technology","volume":"30 5","pages":"1207-1220"},"PeriodicalIF":3.8,"publicationDate":"2024-05-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141122365","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Polyvinylpyrrolidone-functionalized graphene oxide as a nanocarrier for dual-drug delivery of quercetin and curcumin against HeLa cancer cells","authors":"Anita Rana,&nbsp;Monika Matiyani,&nbsp;Pushpa Bhakuni Negi,&nbsp;Himani Tiwari,&nbsp;Kamal Garwal,&nbsp;Souvik Basak,&nbsp;Nanda Gopal Sahoo","doi":"10.1002/vnl.22115","DOIUrl":"10.1002/vnl.22115","url":null,"abstract":"<div>\u0000 \u0000 \u0000 <section>\u0000 \u0000 <p>This study is to develop a nanocarrier based on polyvinylpyrrolidone (PVP)-functionalized graphene oxide (GO–PVP), loaded with both curcumin (CUR) and quercetin (QSR), and then its performance compared with nanocarriers carrying the drugs separately. The study also aimed to investigate the cytotoxic effects of these nanocarriers on HeLa cancer cells. To achieve this, GO was synthesized using a modified version of Hummer's method and subsequently functionalized with PVP. Drug loading onto the GO and GO–PVP nanocarriers was achieved through hydrophobic interactions. Furthermore, the ability of the nanocarriers to accommodate a single drug or a combination of drugs was examined. In our study, combined system shows higher drug loading, that is, 28.1% of QSR and 24.34% of CUR onto GO–PVP–QSR–CUR nanocarrier in comparison to single drug nanocarrier systems GO–PVP–QSR and GO–PVP–CUR which loaded 22.5% of QSR and 18.73% of CUR, respectively. Notably, the synthesized nanocarrier exhibited a pH-sensitive drug release pattern. These results collectively suggest that GO–PVP–CUR–QSR displayed significantly higher cytotoxicity against HeLa cancer cells compared to both single-drug nanocarrier systems at the specified concentrations. In addition, future pre-clinical and clinical studies to evaluate the safety and efficacy of GO–PVP–CUR–QSR for cancer treatment are strongly recommended.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Highlights</h3>\u0000 \u0000 <div>\u0000 <ul>\u0000 \u0000 <li>Developed nanocarrier based on polyvinylpyrrolidone functionalized GO (GO–PVP).</li>\u0000 \u0000 <li>The GO–PVP nanocarrier was loaded with both curcumin (CUR) and quercetin (QSR).</li>\u0000 \u0000 <li>GO–PVP displays a higher loading capacity for both QSR and CUR compared to GO.</li>\u0000 \u0000 <li>QSR- and CUR-loaded GO–PVP nanocarriers exhibited higher cytotoxic effects.</li>\u0000 </ul>\u0000 </div>\u0000 </section>\u0000 </div>","PeriodicalId":17662,"journal":{"name":"Journal of Vinyl & Additive Technology","volume":"30 5","pages":"1241-1253"},"PeriodicalIF":3.8,"publicationDate":"2024-05-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140927043","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Nanoemulsion-laden poly(vinyl) alcohol hydrogel films for transdermal delivery of carbamazepine","authors":"Manali Rai,&nbsp;Preeti Lakra,&nbsp;Harsh Yadav,&nbsp;Sabyasachi Maiti","doi":"10.1002/vnl.22116","DOIUrl":"10.1002/vnl.22116","url":null,"abstract":"<div>\u0000 \u0000 \u0000 <section>\u0000 \u0000 <p>There is an unmet demand for transdermal devices that can deliver large dose of medications through the skin. Herein, nanoemulsion-based poly(vinyl alcohol) (PVA) transdermal hydrogel films were developed for the high-dose anti-epileptic drug carbamazepine. A stable nanoemulsion was created with almond oil, Tween 60, and amphiphilic locust bean gum. The nanoemulsion had a hydrodynamic diameter of 251 nm, a polydispersity of 10.3%, and a zeta potential of −51.2 mV. Carbamazepine-loaded nanoemulsion was blended with carbamazepine-free PVA dispersion and casted into films. To accommodate a high dose, carbamazepine-loaded nanoemulsion was trapped in a PVA dispersion containing carbamazepine to create transdermal films. The physicochemical characteristics and drug penetration characteristics of the produced films were compared. Both films had the uniform thickness, weight, and drug content. The folding endurance was found to be greater than 700 in both cases. Water vapor permeability decreased when carbamazepine was added to almond oil as well as polymer dispersion. FESEM pictures revealed a waxy paper-like appearance for the PVA hydrogel film with dual drug-reservoirs. FTIR spectra assessment revealed a hydrogen bonding interaction between PVA and carbamazepine. X-ray diffraction examination revealed that the film contained an amorphous dispersion of carbamazepine. Dual carbamazepine reservoir-based films outperformed single nanoemulsion drug reservoir-based films in terms of drug flux through excised rat skin by 3.2 times. The in vitro skin permeation findings corresponded well to zero order kinetic models. Overall, this study showed that a high-dose drug could be placed on nanoemulsion-based transdermal PVA hydrogel films, resulting in improved skin permeability.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Highlights</h3>\u0000 \u0000 <div>\u0000 <ul>\u0000 \u0000 <li>Nanoemulsion was stable at almond oil:Tween 60/modified gum ratio of 5:5.</li>\u0000 \u0000 <li>Loading of high dose carbamazepine in nanoemulsion-PVA transdermal films.</li>\u0000 \u0000 <li>Film of dual carbamazepine reservoir showed low water vapor permeation, moisture retention.</li>\u0000 \u0000 <li>Flux of carbamazepine from films improved three times through excised rat skin.</li>\u0000 </ul>\u0000 </div>\u0000 </section>\u0000 </div>","PeriodicalId":17662,"journal":{"name":"Journal of Vinyl & Additive Technology","volume":"30 5","pages":"1254-1269"},"PeriodicalIF":3.8,"publicationDate":"2024-05-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140926943","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Multi-response optimization of characteristics for graphite reinforced biodegradable PVA-fumaric acid cross-linked composite: A gray-fuzzy logic-based hybrid approach","authors":"Saurabh Kafaltiya,&nbsp;Pawan Kumar Agrawal,&nbsp;Pragya Sharma,&nbsp;V. K. Singh,&nbsp;Jitendra Bhaskar,&nbsp;Sakshi Chauhan,&nbsp;Akarsh Verma","doi":"10.1002/vnl.22112","DOIUrl":"10.1002/vnl.22112","url":null,"abstract":"<div>\u0000 \u0000 \u0000 <section>\u0000 \u0000 <p>In the current investigation, enhancement in the mechanical properties, thermal stability, and decrement in the moisture absorption capabilities of polyvinyl alcohol was observed by cross-linking it with different weight percentages (wt. %) of fumaric acid and reinforcing them along with sulfuric acid-modified graphite particles. The effects of altering the cross-linking duration and fumaric acid wt. % were investigated in the resulting composite using the Taguchi L16 experimental design method. As in this contemporary era of rapid industrial expansion and fierce competition, the primary goals of manufacturers revolve around the production of high-quality goods at optimal costs within a specified timeframe. Therefore, to save both cost and time, the authors have utilized a technique known as “gray-fuzzy optimization” to balance competing goals between mechanical (toughness, elongation and strength) and physical (water intake capacity) attributes. The present approach aimed to reduce the experimentation expenses and increase the effectiveness of composite manufacturing by considerably reducing the intricacy of practical multi-response optimization issues. Response graphs and analysis of variance tests were also utilized to calculate the percentage contribution of the input variables and provide model significance.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Highlights</h3>\u0000 \u0000 <div>\u0000 <ul>\u0000 \u0000 <li>Polyvinyl alcohol is cross-linked with different weight percentages (wt. %) of fumaric acid, and reinforced them with sulfuric acid-modified graphite particles.</li>\u0000 \u0000 <li>Enhancement in mechanical properties, thermal stability, and decrease in moisture absorption capabilities were perceived for the fabricated composite.</li>\u0000 \u0000 <li>Effects of altering the cross-linking duration and fumaric acid wt. % were investigated in the resulting composite using the Taguchi L16 experimental design.</li>\u0000 \u0000 <li>Gray-fuzzy optimization technique was utilized to balance competing goals between water intake and mechanical attributes like toughness, elongation and strength.</li>\u0000 \u0000 <li>Response graphs and analysis of variance (ANOVA) tests were also utilized to evaluate the percentage contribution of input variables and provide model significance.</li>\u0000 </ul>\u0000 </div>\u0000 </section>\u0000 </div>","PeriodicalId":17662,"journal":{"name":"Journal of Vinyl & Additive Technology","volume":"30 5","pages":"1190-1206"},"PeriodicalIF":3.8,"publicationDate":"2024-05-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140926942","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Enhancing 3D printing sustainability: Reinforcing thermoplastic polyurethane with recycled polyurethane foam for durable applications in orthopedic footwear","authors":"Toaa Salama Mohamed,&nbsp;Ehssan Nassef,&nbsp;Ashraf Morsy,&nbsp;Hassan A. Ewais,&nbsp;Ahmed H. Abdel-Salam,&nbsp;Ahmed Morsy,&nbsp;Nabil Mahmoud Abd El-Moneim","doi":"10.1002/vnl.22109","DOIUrl":"10.1002/vnl.22109","url":null,"abstract":"<div>\u0000 \u0000 \u0000 <section>\u0000 \u0000 <p>This study seeks to advance the realm of 3D printing through the exploration of fabricating polymer matrix composite objects using recycled materials, with a particular emphasis on bolstering durability. Characterization was carried out by integrating polyurethane foam (PUF) residues into thermoplastic polyurethane (TPU) composites at different concentrations (ranging from 3% to 10% wt/wt), which are frequently employed in 3D printing. The chemical functions were analyzed using Fourier-transform infrared spectroscopy (FTIR), while thermal stability was measured through thermal gravimetric analysis (TGA). The morphology characterized of the material via scanning electron microscopy (SEM) and density measurement identified that the surface roughness and void content of the PUF/TPU composite materials was a significant factor affecting the measured mechanical properties. Experimental results indicate that higher PUF content enhances filament properties and the resultant 3D printed products, showcasing a reduction in both the density and melt index of the produced filament by 15.9% and 34.4%, respectively, with the addition of 5% wt./wt. PUF residues to TPU. Additionally, there was a notable increase in Young's modulus of the produced filament by 79.9% and maximum stress by 12.7%, while elongation at break was reduced by 24.9%. Furthermore, the study highlights the sustainability advantages of utilizing recycled PUF, contributing to waste reduction and associated cost savings. Recycled PUF emerges as a cost-effective additive for synthesizing 3D polymeric materials, holding promise for diverse applications such as orthopedic footwear, leveraging the desirable attributes of TPU.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Highlights</h3>\u0000 \u0000 <div>\u0000 <ul>\u0000 \u0000 <li>Recycled (PUF)/TPU composites for 3D printing, enhancing durability.</li>\u0000 \u0000 <li>PUF content improves filament properties, reducing density and melt index.</li>\u0000 \u0000 <li>Young's modulus and maximum stress of produced filament increases.</li>\u0000 \u0000 <li>Utilizing recycled PUF reduces waste and promises sustainability.</li>\u0000 </ul>\u0000 </div>\u0000 </section>\u0000 </div>","PeriodicalId":17662,"journal":{"name":"Journal of Vinyl & Additive Technology","volume":"30 5","pages":"1153-1163"},"PeriodicalIF":3.8,"publicationDate":"2024-04-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140836967","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Enhancing mechanical properties of polyvinyl chloride: Novel organic-modified cinnamate-intercalated calcium aluminum hydrotalcite as a high-efficiency thermal stabilizer","authors":"Xue Mei,&nbsp;Pingping Jiang,&nbsp;Pingbo Zhang,&nbsp;Zhixuan Cui,&nbsp;Xiaoyuan Zhu,&nbsp;Shijun Chen,&nbsp;Xunxun Sheng,&nbsp;Jingang Gao,&nbsp;Hang Gao","doi":"10.1002/vnl.22111","DOIUrl":"10.1002/vnl.22111","url":null,"abstract":"<div>\u0000 \u0000 \u0000 <section>\u0000 \u0000 <p>To make the hydrotalcite uniformly dispersed in polyvinyl chloride (PVC) and enhance its thermal stability, cinnamate-intercalated calcium aluminum hydrotalcite (CaAl-cinnamate-LDHs) underwent organic modification with cetyltrimethylammonium bromide/sodium dodecyl sulfate/polyethylene glycol (CTAB/SDS/PEG). The structures of modified hydrotalcite were characterized using x-ray diffractometer, scanning electron microscope, particle size analysis, and water contact angle test. The thermal stability was assessed through thermal aging oven experiment, Congo Red experiment, and thermogravimetric experiment, revealing their exceptional performance. Simultaneously, the synergistic effect of PEG-LDHs with auxiliary thermal stabilizers was examined, with epoxy soybean oil proving to be the most effective, which made the PVC sample incompletely black within 120 min. Mechanical properties and dynamic thermomechanical analysis indicated that the overall mechanical characteristics of the PVC samples with modified hydrotalcite were significantly superior to the unmodified CaAl-cinnamate-LDHs. Additionally, the optical performance test demonstrated excellent transparency in the PEG-LDHs/PVC sample. Through analyzing the thermal stability mechanism, it was indicated that hydrotalcite effectively absorbed HCl. Furthermore, the combination of PEG-LDHs and ESO replaced unstable Cl atoms and reacted with conjugated double bonds, thereby reducing the aging and discoloration of PVC.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Highlights</h3>\u0000 \u0000 <div>\u0000 <ul>\u0000 \u0000 <li>The modified hydrotalcite preparation process was simple and easy to operate.</li>\u0000 \u0000 <li>The CTAB/SDS/PEG-LDHs/PVC samples exhibited excellent thermal stability.</li>\u0000 \u0000 <li>Mechanical properties of the PVC samples with modified hydrotalcite were significantly superior to the unmodified CaAl-cinnamate-LDHs.</li>\u0000 </ul>\u0000 </div>\u0000 </section>\u0000 </div>","PeriodicalId":17662,"journal":{"name":"Journal of Vinyl & Additive Technology","volume":"30 5","pages":"1177-1189"},"PeriodicalIF":3.8,"publicationDate":"2024-04-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140836957","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Improving isotactic polybutene-1 performance with diatomaceous earth filler and a novel reversible crosslinking reaction agent","authors":"Abdelbasset Abdessamad Reguig,&nbsp;Said Bouhelal","doi":"10.1002/vnl.22110","DOIUrl":"10.1002/vnl.22110","url":null,"abstract":"<div>\u0000 \u0000 \u0000 <section>\u0000 \u0000 <p>This study investigates the application of a novel approach involving reversible crosslinking reaction agent (RXR) and diatomaceous earth to enhance the properties of isotactic polybutene-1 (PB-1) resin. The present study diverges from conventional methods by focusing on the combined effects of these two additives on various attributes, including rheological, mechanical, thermal, structural, and morphological properties. A unique crosslinking approach involving a combination of sulfur, accelerator, and peroxide was employed to change the surface of diatomaceous earth, yielding promising results. The rheological investigations revealed that the RXR agent led to a substantial increase in viscosity as a result of a crosslinking reaction, while diatomaceous earth had a minimal impact. The incorporation of both compounds led to a significant reduction in mechanical properties. The addition of diatomaceous earth filler demonstrated anti-nucleating characteristics, leading to a reduction in both the temperature at which crystallization occurs and the extent of crystallinity. In contrast, the RXR agent has demonstrated an increase in crystallization temperature. The use of diatomaceous earth filler led to a substantial enhancement in thermal stability. Furthermore, FTIR and WAXS analysis revealed that neither diatomaceous earth nor the RXR agent caused significant alterations in crystalline modification. The SEM micrographs revealed the clustering of diatomaceous earth filler, which is likely due to inadequate interactions between the filler and the matrix, explaining the decrease in mechanical characteristics that was found.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Highlights</h3>\u0000 \u0000 <div>\u0000 <ul>\u0000 \u0000 <li>RXR increases viscosity significantly via crosslinking.</li>\u0000 \u0000 <li>Both agents decrease mechanical properties.</li>\u0000 \u0000 <li>Diatomaceous earth reduces crystallization temperature and degree.</li>\u0000 \u0000 <li>Diatomaceous earth filler enhances thermal stability in PB-1 resin.</li>\u0000 </ul>\u0000 </div>\u0000 </section>\u0000 </div>","PeriodicalId":17662,"journal":{"name":"Journal of Vinyl & Additive Technology","volume":"30 5","pages":"1164-1176"},"PeriodicalIF":3.8,"publicationDate":"2024-04-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140837538","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Improving fire safety of thermoplastic poly(ether ester) elastomer by black phosphorus nanosheets and aluminum diethylphosphinate system","authors":"Shijie Zhang,&nbsp;Jiaxuan Li,&nbsp;Jiuhong Liu,&nbsp;Jinpeng Song,&nbsp;Qing Yu,&nbsp;Liang Song,&nbsp;Guiqing Cheng,&nbsp;Zhongwei Wang,&nbsp;Yuxi Han","doi":"10.1002/vnl.22108","DOIUrl":"10.1002/vnl.22108","url":null,"abstract":"<div>\u0000 \u0000 \u0000 <section>\u0000 \u0000 <p>Thermoplastic poly(ether ester) elastomer (TPEE) is a highly flammable material with severe melt-dropping, which greatly limits its range of applications. Here, black phosphorus nanosheets (BPs) and aluminum diethylphosphinate (ADP) were used to improve the fire safety of TPEE for the first time. Results demonstrated that ADP/BPs as a synergistic combination exhibits good dispersity and excellent flame retardancy, also has minimal negative effects on the mechanical performances of the TPEE composites. By comparing TPEE/ADP-22 and TPEE/ADP-10/BPs-4, the introduction of BPs significantly reduced the addition of ADP while keeping the material at the higher vertical burning grade, ~54.5% reduction in ADP usage. Compared with neat TPEE, TPEE/ADP-10/BPs-4 fulfilled V-0 level, avoided dripping, and the limiting oxygen index value increased to 34.0%. Moreover, TPEE/ADP-10/BPs-4 performed the best in cone calorimetry test, both the peak heat release rate and total heat release reduced the largest, by 44.2% and 25.3%, respectively. The detailed studies of the flame-retardant mechanism found that ADP/BPs showed the fire-retardant impact of the condensed phase and gaseous phase. This work expands BPs in the flame-retardant application and could facilitate to prepare the anti-dripping flame-resistant TPEE.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Highlights</h3>\u0000 \u0000 <div>\u0000 <ul>\u0000 \u0000 <li>BPs as an efficient flame retardant were added into TPEE for the first time.</li>\u0000 \u0000 <li>ADP/BPs as a synergistic combination has an excellent fire-retardant effect.</li>\u0000 \u0000 <li>The introduction of BPs significantly reduced the addition of ADP.</li>\u0000 \u0000 <li>TPEE/ADP-10/BPs-4 showed the highest FPI and the lowest FGI.</li>\u0000 \u0000 <li>ADP/BPs has lowest negative effects on the mechanical performances of matrix.</li>\u0000 </ul>\u0000 </div>\u0000 </section>\u0000 </div>","PeriodicalId":17662,"journal":{"name":"Journal of Vinyl & Additive Technology","volume":"30 5","pages":"1139-1152"},"PeriodicalIF":3.8,"publicationDate":"2024-04-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140810756","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}