Journal of Vinyl & Additive Technology最新文献

{"title":"Effect of various saturation levels of hydrogenated nitrile-butadiene rubber on plasticized polyvinyl chloride performance","authors":"Chundie Zhang,&nbsp;Tingting Chen,&nbsp;Ling Zhang,&nbsp;Jun Zhang","doi":"10.1002/vnl.22136","DOIUrl":"10.1002/vnl.22136","url":null,"abstract":"<div>\u0000 \u0000 \u0000 <section>\u0000 \u0000 <p>Plasticized polyvinyl chloride (PVC) burns easily and generates a lot of smoke during combustion. In order to improve the comprehensive performance of plasticized PVC, hydrogenated nitrile-butadiene rubber (HNBR) with different degrees of saturation (88%, 94% and 99%) were melt blended with plasticized PVC. Compared to the plasticized PVC without HNBR, the glass transition temperature decreased from −10.6 to −26.0°C, the initiation temperature for thermal degradation increased from 272 to 281°C, the elongation at break enlarged from 316% to 477%, and the permanent set dropped from 72% to 61% when HNBR was added to plasticized PVC at a ratio of 30 parts per hundred parts of resin. However, this resulted in a weakening of tensile strength of the plasticized PVC. Additionally, in the cone calorimetry test, the total smoke production of the PVC/HNBR blends (from 18 to 22 m²) was lower than that of the PVC control (23 m²) and the time to ignition was increased from 26 to 32 s. As a result, PVC/HNBR is expected to gain popularity in the rubber and plastic pipe, wire, and cable sheathing industries.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Highlights</h3>\u0000 \u0000 <div>\u0000 <ul>\u0000 \u0000 <li>Plasticized PVC improves thermal stability by melt blending with HNBR.</li>\u0000 \u0000 <li>All PVC/HNBR samples have excellent low-temperature resistance.</li>\u0000 \u0000 <li>The addition of HNBR decreases the burning smoke density of plasticized PVC.</li>\u0000 </ul>\u0000 </div>\u0000 </section>\u0000 </div>","PeriodicalId":17662,"journal":{"name":"Journal of Vinyl & Additive Technology","volume":"30 6","pages":"1514-1527"},"PeriodicalIF":3.8,"publicationDate":"2024-07-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141550347","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":"Methacrylic acid grafted inulin and carboxymethyl cellulose as additives in the development of pH sensitive hydrogel matrix for colon targeting","authors":"Pallobi Dutta,&nbsp;Kaushik Mukherjee,&nbsp;Tapan Kumar Giri","doi":"10.1002/vnl.22133","DOIUrl":"10.1002/vnl.22133","url":null,"abstract":"<div>\u0000 \u0000 \u0000 <section>\u0000 \u0000 <p>Compression-coated matrix tablets were developed to target budesonide (BUD) in the colonic region using methacrylic acid (MAA) grafted inulin (INU) and carboxymethyl cellulose (CMC). INU was grafted with MAA to impart anionic characteristics to the gum, making it feasible to form a hydrogel by cross-linking with calcium gluconate (CG). The core matrix made up of MAA-g-INU alone disintegrated within 30 min and the core matrix made up of CMC alone completely released BUD within 6 h. The combination of MAA-g-INU and CMC produced a rigid matrix, which was able to completely release BUD after 7 h. Compression coating of the core tablets with MAA-g-INU and CMC did not release BUD in the first 4 h, and complete BUD release took place in the next 4 h. Compression coating led to the formation of a rigid and viscous gel layer outside the core matrices, which hindered BUD release. We conclude that compression coating with CG cross-linked CMC and MAA-g-INU could be used as a matrix for colonic delivery of drugs.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Highlights</h3>\u0000 \u0000 <div>\u0000 <ul>\u0000 \u0000 <li>Compression coated matrices were developed for colonic delivery of BUD.</li>\u0000 \u0000 <li>The matrix retained drug release up to 4 h in upper gastrointestinal tract (GIT).</li>\u0000 \u0000 <li>The matrix exhibited complete drug release in the next 4 h in the colon.</li>\u0000 </ul>\u0000 </div>\u0000 </section>\u0000 </div>","PeriodicalId":17662,"journal":{"name":"Journal of Vinyl & Additive Technology","volume":"30 6","pages":"1485-1502"},"PeriodicalIF":3.8,"publicationDate":"2024-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141519804","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":"Effects of nano-TiO2 in configuration design and sound absorption of polyvinyl alcohol coated composite fabric structure","authors":"Shubing Zhu,&nbsp;Xiaoning Tang","doi":"10.1002/vnl.22134","DOIUrl":"10.1002/vnl.22134","url":null,"abstract":"<div>\u0000 \u0000 \u0000 <section>\u0000 \u0000 <p>With the rapid development of industrialization and population surge in modern society, noise pollution has been considered as a serious threat to human beings. In order to effectively reduce noise, the application of sound absorbing textile materials has gradually increased, also the rapid development of acoustic coating consists of conventional fiber layers and polymers. In this work, the surface morphology, micro-structure and sound absorption properties of polyvinyl alcohol coated fabric and its composites were studied. It was found that the addition of nano-TiO₂ particles can obviously improve the sound absorption properties, and the absorption coefficient is related to fabric thickness. Furthermore, the surface of the coated fabric was compounded with melt-blown nonwoven fabric, thus to fabricate composite sound absorber. This work indicates the good feasibility and promising application prospect of lightweight polyvinyl alcohol coated fabrics in noise reduction engineering.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Highlights</h3>\u0000 \u0000 <div>\u0000 <ul>\u0000 \u0000 <li>Combination of fiber layers and polymers for acoustic coating materials.</li>\u0000 \u0000 <li>Adding inorganic nano-TiO₂ particles with different contents.</li>\u0000 \u0000 <li>Different modification methods to improve the dispersion of coating.</li>\u0000 \u0000 <li>Composite structure with reduced thickness and increased sound absorption.</li>\u0000 </ul>\u0000 </div>\u0000 </section>\u0000 </div>","PeriodicalId":17662,"journal":{"name":"Journal of Vinyl & Additive Technology","volume":"30 6","pages":"1503-1513"},"PeriodicalIF":3.8,"publicationDate":"2024-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141502408","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":"Effect of solid lubricant additives on solid particle erosion characteristics of rigid and toughened epoxy resins","authors":"Pelin Özzaim Toker,&nbsp;Orkan Baran Korkusuz,&nbsp;Elanur Ozun,&nbsp;Reyhan Ceylan,&nbsp;Sinan Fidan,&nbsp;Eser Yarar,&nbsp;Mustafa Özgür Bora,&nbsp;Tamer Sınmazçelik","doi":"10.1002/vnl.22132","DOIUrl":"10.1002/vnl.22132","url":null,"abstract":"&lt;div&gt;\u0000 \u0000 \u0000 &lt;section&gt;\u0000 \u0000 &lt;p&gt;Solid lubricants are added to polymers to upgrade their tribological properties, especially in cases where adhesive and abrasive friction are valid. However, there are not enough studies on the effects of solid lubricants on particle erosion. This study investigated the effects on solid particle erosion behavior of three different well known solid lubricants (molybdenum disulfide, polytetrafluoroethylene, and graphite). These solid lubricants were added at three different ratios (5, 10, and 15 wt.%) to the two different type (rigid and toughened) epoxy resins. Garnet abrasive particles (180–400 μm) were blasted to the sample surface under 1.5 bar for 15 s to conduct solid particle erosion tests. The erosive wear mechanisms of neat and solid lubricant-reinforced epoxy resins were investigated in relation to the epoxy type, solid lubricant type, and solid lubricant reinforcement ratio. Statistical analysis was performed according to response surface methodology to support the experimental results, and ANOVA tables were obtained. The wear and deformations that occurred on the surface after solid particle erosion were examined using a noncontact optical profilometer system and scanning electron microscopy, and a significant relationship was detected between the deformation on the surface and particle erosion. Analysis results showed that the factor causing the greatest erosion rate change was the epoxy resin type. Finally, it has been observed that all solid lubricants reduce the erosive wear resistance, and this resistance decreases as the weight ratio increases.&lt;/p&gt;\u0000 &lt;/section&gt;\u0000 \u0000 &lt;section&gt;\u0000 \u0000 &lt;h3&gt; Highlights&lt;/h3&gt;\u0000 \u0000 &lt;div&gt;\u0000 &lt;ul&gt;\u0000 \u0000 &lt;li&gt;Investigations were conducted into the erosion behavior of two types of epoxy resins: rigid and toughened. The toughened epoxy resin exhibited greater resistance to erosion. Although it has the same type of content, on average, rigid epoxy worn 2–4 times more than toughened epoxy.&lt;/li&gt;\u0000 \u0000 &lt;li&gt;The effect of adding polytetrafluoroethylene tended to increase the erosion rate of both rigid and toughened epoxy resin less than that of other solid lubricants.&lt;/li&gt;\u0000 \u0000 &lt;li&gt;Graphite particles increased the erosion rate of toughened epoxy by 1.5–3 times and that of rigid epoxy by 2–3 times, depending on the value of the reinforcement ratio.&lt;/li&gt;\u0000 \u0000 &lt;li&gt;MoS&lt;sub&gt;2&lt;/sub&gt; increased the erosion rate of toughened epoxy by 1.5–3 times and that of rigid epoxy by 2–3 times.&lt;/li&gt;\u0000 \u0000 &lt;li&gt;Using a noncontact optical profilometer (for investigating surface topography), it was proven that there is a significant relationship between the erosion rate and ","PeriodicalId":17662,"journal":{"name":"Journal of Vinyl & Additive Technology","volume":"30 6","pages":"1468-1484"},"PeriodicalIF":3.8,"publicationDate":"2024-06-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/vnl.22132","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141502522","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"DL-Isoborneol esters as nontoxic main plasticizers for polyvinyl chloride with improved processability, thermal stability, and mechanical performance","authors":"Hong-ying Chu,&nbsp;Chuan Gao,&nbsp;Shuai Huang,&nbsp;Xin-Ding Yao","doi":"10.1002/vnl.22126","DOIUrl":"10.1002/vnl.22126","url":null,"abstract":"<div>\u0000 \u0000 \u0000 <section>\u0000 \u0000 <p>DL-Isoborneol is a forestry chemical product that can serve as an intermediate in the synthesis of value-added plasticizer products. In this study, three kinds of DL-Isoborneol esters (octanoic acid-DL-Isoborneol, decanoic acid-DL-Isoborneol ester, and lauric acid-DL-Isoborneol ester [LDE]) with different fatty hydrocarbon chains were synthesized via esterification reaction. Fourier transform infrared spectrometer (FT-IR) and Nuclear magnetic hydrogen spectrum (¹H NMR) indicated that DL-Isoborneol esters were successfully synthesized. The oral toxicity experiment of plasticizers in mice indicated that DL-Isoborneol esters have toxic doses of 5000 mg/kg and was environmentally friendly and nontoxic. DL-Isoborneol esters were used as main plasticizers to plasticize polyvinyl chloride (PVC) and compared with commercial plasticizer dioctyl phthalate (DOP). The results showed that DL-Isoborneol esters could improve thermoplastic processing performance and thermal stability of plasticized PVC than DOP. DL-Isoborneol esters and PVC showed more excellent compatibility compared with DOP. <i>T</i>_g of plasticized PVC reached 22°C, tensile strength and elongation at break of PVC plasticized with 40 wt% LDE reached 12.90 ± 0.83 MPa and 342 ± 13%, respectively. DL-Isoborneol esters with improved migration resistance performance and plasticization efficiency can completely replace DOP as main plasticizers for PVC.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Highlights</h3>\u0000 \u0000 <div>\u0000 <ul>\u0000 \u0000 <li>DL-Isoborneol esters with different fatty hydrocarbon chains were synthesized.</li>\u0000 \u0000 <li>DL-Isoborneol esters have toxic doses of 5000 mg/kg and are nontoxic.</li>\u0000 \u0000 <li>DL-Isoborneol esters can be used as main plasticizer for PVC.</li>\u0000 \u0000 <li>Plasticized PVC with improved processability.</li>\u0000 \u0000 <li>DOP can be completely replaced by DL-Isoborneol esters.</li>\u0000 </ul>\u0000 </div>\u0000 </section>\u0000 </div>","PeriodicalId":17662,"journal":{"name":"Journal of Vinyl & Additive Technology","volume":"30 5","pages":"1317-1326"},"PeriodicalIF":3.8,"publicationDate":"2024-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141519805","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":"Use of recycled rubber in carbon black as a filler in ternary blends of NR/BR/SBR for the automotive tire industry","authors":"Slaviša Jovanović,&nbsp;Suzana Samaržija-Jovanović,&nbsp;Vojislav Jovanović,&nbsp;Gordana Marković,&nbsp;Jelena Vujaković,&nbsp;Milena Marinović-Cincović","doi":"10.1002/vnl.22128","DOIUrl":"https://doi.org/10.1002/vnl.22128","url":null,"abstract":"<div>\u0000 \u0000 \u0000 <section>\u0000 \u0000 <p>This work aims to find the optimal ratio of recycled rubber (RR) in carbon black (CB)/RR filler and determine its influence on the mechanical properties, thermal behavior, and activation energy of ternary rubber based on polyisoprene (natural rubber [NR]), polybutadiene (butadiene rubber [BR]), and styrene–butadiene rubber (SBR) with a constant ratio of 40/40/20 parts per 100 of rubber (phr). The filler used was N330 (60 phr) and a mixture of CB/RR filler in the following proportions: 55/5, 50/10, and 40/20 phr. The activation energy of the examined samples was determined by the rheometric method. The samples were subjected to thermo-oxidative (at 100°C after 168 h) and γ-radiation aging (200 kGy). Hardness, tensile strength, and elongation at break were evaluated before and after thermo-oxidative and γ-radiation aging. SEM, attenuated total reflectance fourier-transform infrared (ATR-FTIR), and TG/DTG techniques were used to characterize NR/BR/SBR composites.</p>\u0000 \u0000 <p>The results show that the most optimal CB/RR ratio is 55/5 phr, which is confirmed by the mechanical properties before and after aging and the results for the activation energies of cross-linking and reversion. The thermal stability of the composite containing 60 phr of the CB and the composite reinforced with 5 phr of the RR in CB/RR filler is almost the same.</p>\u0000 \u0000 <p>The results of this research may be applicable in the automotive tire industry since NR/BR/SBR composites are used for automotive tire treads. Another benefit of this research is that the partial replacement of CB with RR contributes to the reduction of tire waste, and thus to the preservation of environmental protection.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Highlights</h3>\u0000 \u0000 <div>\u0000 <ul>\u0000 \u0000 <li>Rubber composite NR/BR/SBR = 40/40/20 phr reinforced with CB/RR filler</li>\u0000 \u0000 <li>The amount of RR in the CB/RR filler has been changed to 5, 10 and 20 phr</li>\u0000 \u0000 <li>The lowest value for <i>E</i>_ac has the sample containing filler CB/RR = 55/5 phr</li>\u0000 \u0000 <li>The most thermally stable sample is the sample with 5 phr RR in CB/RR filler</li>\u0000 \u0000 <li>RR (5 phr) can be applied in CB/RR filler to reinforce NR/BR/SBR composites</li>\u0000 </ul>\u0000 </div>\u0000 </section>\u0000 </div>","PeriodicalId":17662,"journal":{"name":"Journal of Vinyl & Additive Technology","volume":"30 5","pages":"1341-1356"},"PeriodicalIF":3.8,"publicationDate":"2024-06-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/vnl.22128","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142158551","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Enhanced thermal conductivity of reduced graphene oxide reinforced polymer films through a novel GO reduction mechanism","authors":"Mohammad Owais,&nbsp;Amit Kumar Pal,&nbsp;Zainab Waris,&nbsp;Natalia Khoteeva,&nbsp;Aleksei Shiverskii,&nbsp;Kamil Yusupov,&nbsp;Sergey G. Abaimov","doi":"10.1002/vnl.22130","DOIUrl":"https://doi.org/10.1002/vnl.22130","url":null,"abstract":"<div>\u0000 \u0000 \u0000 <section>\u0000 \u0000 <p>Graphene's remarkable thermal conductance characteristics makes it a very promising thermal interface material for polymeric composites. In this study, we propose an innovative approach aimed at augmenting the thermal conductivity of flexible composite films, employing reduced graphene oxide (rGO) and polyvinyl alcohol (PVA) as the constituent materials. The fabrication process involves the utilization of solution casting coupled with a low-temperature chemical reduction method for graphene oxide (GO). Given that the high thermal conductivity of polymer nanocomposites typically correlates with increased crystallinity and reduced defects, our primary objective is to investigate the impact of reduction of GO in order to associate enhance crystallinity within the graphene oxide-polymer system, with the overall increased thermal conductivity of the resulting GO/PVA films. The diethylene glycol-GO/PVA films thus, generated through this methodology exhibit an exceptional thermal conductivity of approximately 5.1 W/mK, achieved with a mere 10 wt.% filler loading. This surpasses the thermal conductivity observed in films comprised solely of GO/PVA. The notable enhancement in thermal conductivity can be attributed to several factors, including improved crystallinity and reduced defects of GO with effective polymeric bridging facilitated by the rGO with PVA. Collectively, these advancements contribute to the overall thermal performance of the material, presenting a promising methodology for future developments in the field of thermal conductivity materials.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Highlights</h3>\u0000 \u0000 <div>\u0000 <ul>\u0000 \u0000 <li>Reduction of GO through a streamlined and facile methodology.</li>\u0000 \u0000 <li>Orchestrated a controlled reduction process at lower temperatures and simultaneously enhancing the crystallinity and decreasing the defects of GO.</li>\u0000 \u0000 <li>Fabricated reduced GO/PVA polymer films exhibited an exceptional thermal conductivity of approximately 5.1 W/mK with just a 10 wt.% filler loading.</li>\u0000 </ul>\u0000 </div>\u0000 </section>\u0000 </div>","PeriodicalId":17662,"journal":{"name":"Journal of Vinyl & Additive Technology","volume":"30 6","pages":"1446-1457"},"PeriodicalIF":3.8,"publicationDate":"2024-06-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142664988","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":"Effect and mechanism study of mixed-dimensional palygorskite clay on thermo-stability, flame-retardant and smoke-suppression for PC/ABS composites","authors":"Zeyang Gao,&nbsp;Yu Zhu,&nbsp;Bihe Yuan,&nbsp;Bin Mu","doi":"10.1002/vnl.22129","DOIUrl":"10.1002/vnl.22129","url":null,"abstract":"<div>\u0000 \u0000 \u0000 <section>\u0000 \u0000 <p>This investigation investigates the effects and mechanisms of mixed-dimensional palygorskite clay (MDPal) on the thermal stability, flame retardancy and smoke suppression of polycarbonate/acrylonitrile-butadiene-styrene (PC/ABS) composites. MDPal, comprising palygorskite and illite as its main mineral components, is characterized by its interwoven morphology and the presence of Fe ions in its octahedral framework, making it highly promising for enhancing the fire safety of flammable composites. The incorporation of MDPal at a 10 wt% dosage leads to significant improvements in the fire safety of PC/ABS composites, including the reduction of 29.8% in peak heat release rate, 9.9% in total heat release, 34.5% in peak smoke production rate and 15.7% in total smoke production compared to pure PC/ABS. Besides, there is a notable increase of 31.5% in tensile strength and 80.4% in elongation at break when the content is 5 wt%. This research offers valuable insights into the application of MDPal for enhancing the thermal stability, flame retardancy and smoke suppression of flammable polymers.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Highlights</h3>\u0000 \u0000 <div>\u0000 <ul>\u0000 \u0000 <li>MDPal plays dual functions in gas and condensed phases as a flame retardant.</li>\u0000 \u0000 <li>MDPal effectively reduces the heat and smoke release of PC/ABS composites.</li>\u0000 \u0000 <li>MDPal improves the thermo-stability and tensile strength of PC/ABS composites.</li>\u0000 \u0000 <li>The flame-retardant and smoke-suppression mechanisms of PALC are elucidated.</li>\u0000 </ul>\u0000 </div>\u0000 </section>\u0000 </div>","PeriodicalId":17662,"journal":{"name":"Journal of Vinyl & Additive Technology","volume":"30 6","pages":"1432-1445"},"PeriodicalIF":3.8,"publicationDate":"2024-06-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141342387","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":"Effect of solid lubricant reinforcing on drilling performance of castamide and thermal analysis","authors":"Eser Yarar,&nbsp;Tamer Sinmazçelik","doi":"10.1002/vnl.22124","DOIUrl":"10.1002/vnl.22124","url":null,"abstract":"<div>\u0000 \u0000 \u0000 <section>\u0000 \u0000 <p>This study addresses the pressing need for enhancing the machining performance and hole quality of castamide by investigating the effects of solid lubricant addition and drilling parameters. Castamide, a highly crystalline polyamide synthesized via anionic ring-opening polymerization, offers superior mechanical, physical, and chemical properties compared to conventional polyamide 6. However, its machining process, particularly drilling, remains a critical challenge due to its viscoelastic nature and sensitivity to heat generation. Using experimental investigations, thrust forces, drilling temperatures, hole geometry, and quality parameters are systematically analyzed and discussed. Notably, the study introduces Kestlub, a modified version of castamide with solid lubricant, and evaluates its drilling performance, a previously unexplored area in the literature. The research employs response surface methodology to model experimental data, considering both linear and quadratic effects of drilling parameters. Additionally, the significance of each parameter is assessed using ANOVA tables and Pareto charts, offering valuable insights into optimizing the drilling process for enhanced hole quality in castamide. It found that optimal drilling conditions occur at low rotational speeds and high feed rates, but thermal damage, influenced by factors like thermal conductivity and transition temperature, affects hole geometry and burr formation.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Highlights</h3>\u0000 \u0000 <div>\u0000 <ul>\u0000 \u0000 <li>Drilling performances of solid lubricant reinforced castamides were investigated.</li>\u0000 \u0000 <li>Drilling temperatures were recorded with a thermal camera and differential scanning calorimeter and thermal gravimetric analyses were performed.</li>\u0000 \u0000 <li>Drilling properties were analyzed statistically according to the response surface method.</li>\u0000 \u0000 <li>It found that optimal drilling conditions occur at low rotational speeds and high feed rates.</li>\u0000 </ul>\u0000 </div>\u0000 </section>\u0000 </div>","PeriodicalId":17662,"journal":{"name":"Journal of Vinyl & Additive Technology","volume":"30 5","pages":"1285-1301"},"PeriodicalIF":3.8,"publicationDate":"2024-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/vnl.22124","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141368228","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Electrospun hexagonal boron nitride/CNT reinforced nanocomposite fiber mats for cosmic radiation shielding","authors":"Serra Ersoy,&nbsp;Mücahid Özcan,&nbsp;Cengiz Kaya,&nbsp;Figen Kaya","doi":"10.1002/vnl.22125","DOIUrl":"10.1002/vnl.22125","url":null,"abstract":"<div>\u0000 \u0000 \u0000 <section>\u0000 \u0000 <p>A novel methodology is introduced to asses the efficacy of cosmic radiation shielding through the fabrication of electrospun nanocomposite fiber mats reinforced with hexagonal boron nitride (h-BN) and carbon nanotubes (CNTs). These mats were fabricated using various h-BN particles synthesized with 1 M boric acid and four distinct 1 M nitrogen sources to produce polyethylene oxide (PEO) nanofibers via the electrospinning method at 15 kV, a 43.0 μL/min pumping rate, and a 20 cm distance with a maximum thickness of 10 μm. High neutron shielding capability nanocomposite fibers denoted BN-F4 (spun with h-BN [melamine]/CNT powders in a 5 wt% PEO solution) and BN-F5 (spun with h-BN [urea]/CNT powders in a 5 wt% PEO solution) were produced. By calculating the theoretical photon transmittance and evaluating the neutron shielding efficiency with an Am-Be neutron source and a BF₃ neutron detector, the cosmic radiation shielding capability of nanocomposite mats was discussed. BN-F4 and BN-F5 exhibited neutron shielding properties of 7.124% and 6.37% for 3.82 and 1.87 g/mL, respectively. This research establishes a new benchmark in the fabrication of flexible, ultrathin, and lightweight radiation shielding materials and enhances the practicality of nanocomposites reinforced with h-BN and CNTs by incorporating synthesizing and characterizing steps.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Highlights</h3>\u0000 \u0000 <div>\u0000 <ul>\u0000 \u0000 <li>In the study, hexagonal boron nitride production was carried out with four different nitrogen sources and which one showed better structural and morphological properties was supported by analysis.</li>\u0000 \u0000 <li>Additionally, an optimization study of nanofibers by electrospinning by adding CNT and h-BN particles with PEO polymer is included.</li>\u0000 \u0000 <li>It is thought that the production of h-BN and nanofiber work as a radiation shielding feature for use in space studies will be innovative and contribute to the deficiency in the literature.</li>\u0000 </ul>\u0000 </div>\u0000 </section>\u0000 </div>","PeriodicalId":17662,"journal":{"name":"Journal of Vinyl & Additive Technology","volume":"30 5","pages":"1302-1316"},"PeriodicalIF":3.8,"publicationDate":"2024-06-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/vnl.22125","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141372387","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}