Journal of Elastomers & Plastics最新文献_第10页

Studies on the thermal stability of vinyl ester/polyurethane IPNs by gravimetric analysis 用重量分析法研究乙烯酯/聚氨酯ipn的热稳定性

Journal of Elastomers & Plastics Pub Date : 2022-10-19 DOI: 10.1177/00952443221130475

Jagesh Kumar Ranjan, S. Goswami

引用次数: 1

Experimental evaluation of utilizing synthetic continuous fiber reinforcements for thermoplastics as an alternative to steel-based analogs 利用合成连续纤维增强热塑性塑料替代钢基类似物的实验评价

Journal of Elastomers & Plastics Pub Date : 2022-10-17 DOI: 10.1177/00952443221133240

N. Syed, Utkarsh Utkarsh, Muhammad Tariq, A. Behravesh, Qingping Guo, G. Rizvi, R. Pop-Iliev

{"title":"Experimental evaluation of utilizing synthetic continuous fiber reinforcements for thermoplastics as an alternative to steel-based analogs","authors":"N. Syed, Utkarsh Utkarsh, Muhammad Tariq, A. Behravesh, Qingping Guo, G. Rizvi, R. Pop-Iliev","doi":"10.1177/00952443221133240","DOIUrl":"https://doi.org/10.1177/00952443221133240","url":null,"abstract":"Despite being inexpensive and robust, steel cord reinforcements are often prone to pose risks to user health and safety in some industrial applications such as escalator handrails and rubber conveyor belts. Steel cords can reduce the overall stability and performance of the application over time due to their inherent creep accompanied by cyclic thermal expansion and contraction. In this context, this research focuses on replacing steel cords in some critical thermoplastic polyurethane (TPU) composite applications with continuous sustainable alternate synthetic fibers that possess high specific strength (e.g. carbon, glass, and Kevlar fibers). The first part of this research characterizes the effect of epoxy coating on synthetic fibers alone by studying their mechanical properties before and after modification, whereas the second half of the research involves reinforcing a TPU matrix with raw and epoxy-coated synthetic fibers to fabricate fiber-reinforced composites by compression molding. The effect of the curing temperature of epoxy on the end performance of the manufactured specimen was also tested. An in-depth analysis of mechanical and morphological studies showed that, at almost the same volume fraction of fibers, the TPU reinforced composites with modified carbon fibers showed higher load-bearing capacities than steel cord-based analogs. Conversely, a wide variety of other relevant industrial and commercial applications can potentially draw significant benefits by implementing these modified carbon/TPU composites instead of steel cords.","PeriodicalId":15613,"journal":{"name":"Journal of Elastomers & Plastics","volume":"9 1","pages":"1221 - 1237"},"PeriodicalIF":0.0,"publicationDate":"2022-10-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85705683","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}

引用次数: 1

Study on volume swell and mechanical properties of fuel system elastomers with Fischer–Tropsch fuel for diesel engines 柴油机用费托燃料燃料系统弹性体的体积膨胀和力学性能研究

Journal of Elastomers & Plastics Pub Date : 2022-10-11 DOI: 10.1177/00952443221133539

Tao Wu, Wu-gao Zhang, Haiyong Peng, Haibo Zhang

{"title":"Study on volume swell and mechanical properties of fuel system elastomers with Fischer–Tropsch fuel for diesel engines","authors":"Tao Wu, Wu-gao Zhang, Haiyong Peng, Haibo Zhang","doi":"10.1177/00952443221133539","DOIUrl":"https://doi.org/10.1177/00952443221133539","url":null,"abstract":"The compatibility of elastomers used in engine fuel system with Fischer–Tropsch (FT) fuel is essential, but there is very limited research available on it. In this work, the compatibility between four types of commonly used elastomers in fuel system and FT fuel was experimentally investigated. The assessed elastomers including nitrile butadiene rubber (NBR), ethylene propylene diene-monomer rubber (EPDM), fluoroelastomer (FKM), and chlorinated polyethylene (CPE) were exposed to FT fuel which derived from natural gas for 21 days. The properties of the elastomers such as mass, volume, hardness, tensile strength, elongation at break, and tear strength were measured before and after immersion, at the same time the change rates of these properties were calculated. The results demonstrated that all properties of EPDM deteriorated significantly after soak, and its compatibility with FT fuel was the worst, making it unsuitable for FT engines. NBR, FKM, and CPE all showed low rates of property change, with FKM exhibiting the greatest compatibility performance with FT fuel. Additionally, the O-rings made of FKM were submerged in FT fuel and diesel for 7 days, 14 days, and 21 days, respectively. It was found that the mass and volume variations of FKM O-rings in FT fuel were negligible and comparable with those of diesel fuel.","PeriodicalId":15613,"journal":{"name":"Journal of Elastomers & Plastics","volume":"2014 1","pages":"1202 - 1218"},"PeriodicalIF":0.0,"publicationDate":"2022-10-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86827906","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}

引用次数: 0

Effect of X-ray exposure on nano-mechanical properties of multi-walled carbon nanotube incorporated silicone polymer nanocomposites: An AFM-based study x射线曝光对多壁碳纳米管有机硅聚合物纳米复合材料纳米力学性能的影响:基于原子力显微镜的研究

Journal of Elastomers & Plastics Pub Date : 2022-10-10 DOI: 10.1177/00952443221133237

M. Vadivel, S. Jayakumar, B. B. Lahiri, J. Philip

{"title":"Effect of X-ray exposure on nano-mechanical properties of multi-walled carbon nanotube incorporated silicone polymer nanocomposites: An AFM-based study","authors":"M. Vadivel, S. Jayakumar, B. B. Lahiri, J. Philip","doi":"10.1177/00952443221133237","DOIUrl":"https://doi.org/10.1177/00952443221133237","url":null,"abstract":"Nano-mechanical properties of silicone polymer-based nanocomposites loaded with multi-walled carbon nanotube (MWCNT) as nanofillers are probed here using the atomic force microscopy (AFM) technique. Further, the effects of MWCNT concentration and X-ray exposure on the nano-mechanical and topographic properties of the polymer nanocomposites are systematically studied. The root mean square surface roughness is found to increase by ∼123% when the neat polymer matrix is loaded with 2.5 wt.% of MWCNT, whereas, for a fixed MWCNT concentration, the surface roughness is found to increase by ∼171% after X-ray irradiation. This is attributed to the X-ray induced polymer degradation, polymer pull-out and poor filler-matrix interaction leading to the aggregation of MWCNT. Adhesion force and adhesion energy are estimated from the AFM-based force-displacement curves. Both quantities are found to increase with MWCNT concentration. After an exposure to diagnostic X-rays (30–70 keV), the adhesion force is found to increase by ∼4 times, which is attributed to the increased tip-surface contact area due to the higher surface roughness of the X-ray exposed samples. Further, the variation of adhesion energy with filler concentration is found to be in agreement with the theoretical values obtained from the Johnson, Kendall and Roberts (JKR) model. The elastic modulus is found to increase with the filler concentration due to an increase in adhesion force. The obtained results are beneficial for the optimal design of nanofiller loaded polymer nanocomposites for various applications, including the fabrication of lead-free radio-opaque nanocomposites.","PeriodicalId":15613,"journal":{"name":"Journal of Elastomers & Plastics","volume":"88 1","pages":"1172 - 1201"},"PeriodicalIF":0.0,"publicationDate":"2022-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76854281","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}

引用次数: 2

A design of experiment study to investigate the effects of hardener concentration, stirring time, and air bubbles on the tensile strength of epoxy resin 研究了硬化剂浓度、搅拌时间和气泡对环氧树脂抗拉强度的影响

Journal of Elastomers & Plastics Pub Date : 2022-10-01 DOI: 10.1177/00952443221131197

R. Sritharan, D. Askari

{"title":"A design of experiment study to investigate the effects of hardener concentration, stirring time, and air bubbles on the tensile strength of epoxy resin","authors":"R. Sritharan, D. Askari","doi":"10.1177/00952443221131197","DOIUrl":"https://doi.org/10.1177/00952443221131197","url":null,"abstract":"Epoxy is one of the widely used polymeric resin systems in composite industries, which is a two-part resin system that requires the mixing of a hardening agent to trigger the polymerization process. The mixing ratio and pot-life are usually specified and provided by the manufacturer; however, the stirring time and the details of the mixing process were left to the fabricator to configure, based on some visual observations, which may vary from person to person. Although the mixing ratio is fixed by the resin manufacturer, errors may occur during the weighing and transfer of resin parts. The hardener concentration and stirring time are two of the most important factors that can affect the resin properties. In addition, air bubbles can be formed during the stirring process, which is inevitable. Design of experiment (DOE) is one of the widely used tools to design, control, and study the effects of multiple factors. In this research, DOE with a factorial design of 23−1 (2k−1) was used to study the effects of hardener concentration, stirring time, and air bubbles on the tensile strength of epoxy resin. Test specimens were fabricated, cut, and tested as per ASTM D638 standard (i.e., common test performed in the industry for plastics) in a randomized order and then the results were statistically analyzed using Design-Expert software. The test results showed that all three factors significantly affect the tensile strength of the epoxy, and they should be carefully optimized and used for the fabrication of composite materials with optimal properties.","PeriodicalId":15613,"journal":{"name":"Journal of Elastomers & Plastics","volume":"329 1","pages":"1129 - 1147"},"PeriodicalIF":0.0,"publicationDate":"2022-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76863987","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}

引用次数: 0

Synthesis, characterization, and properties of a new polyurethane elastomer based on tragacanth gum polysaccharide 一种新型黄花胶多糖聚氨酯弹性体的合成、表征及性能研究

Journal of Elastomers & Plastics Pub Date : 2022-10-01 DOI: 10.1177/00952443221107358

Elham Badakhshanian, M. Ghaemy

{"title":"Synthesis, characterization, and properties of a new polyurethane elastomer based on tragacanth gum polysaccharide","authors":"Elham Badakhshanian, M. Ghaemy","doi":"10.1177/00952443221107358","DOIUrl":"https://doi.org/10.1177/00952443221107358","url":null,"abstract":"This study prepared a type of bio-based elastomeric polyurethane from tragacanth gum (TG). TG is a natural polysaccharide with many hydroxyl groups that can be used as a chain extender and a crosslinker to react with the isocyanate groups in polyurethane prepolymer to form a highly branched and crosslinked polyurethane with high molecular weight and good mechanical properties. The chemical structure of the prepolymer and the thermal and mechanical properties of the prepared polyurethane were studied by Fourier transform infrared, nuclear magnetic resonance, scanning electron microscopy, thermal gravimetric analysis, dynamic mechanical thermal analysis, and tensile strength tester. The properties of the polyurethane-based on TG (TG-PU) were compared with the properties of the PU based on only polyethylene glycol. The TG-PU sample with 0.5 g TG showed a tensile strength of 288% and the glass transition temperature (Tg) of 33% higher than the tensile strength and Tg of PU without TG. We expect these findings to widen the range of preparation and applications of bio-based polyurethane materials. Graphical Abstract","PeriodicalId":15613,"journal":{"name":"Journal of Elastomers & Plastics","volume":"1 1","pages":"1025 - 1039"},"PeriodicalIF":0.0,"publicationDate":"2022-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82350635","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}

引用次数: 2

RTV-SiR based composites aged in a multi-stressed environment under AC and bipolar DC voltages 基于RTV-SiR的复合材料在交流和双极直流电压下的多应力环境中老化

Journal of Elastomers & Plastics Pub Date : 2022-09-30 DOI: 10.1177/00952443221131199

Atif Mahmood, S. Alam

{"title":"RTV-SiR based composites aged in a multi-stressed environment under AC and bipolar DC voltages","authors":"Atif Mahmood, S. Alam","doi":"10.1177/00952443221131199","DOIUrl":"https://doi.org/10.1177/00952443221131199","url":null,"abstract":"Silicone rubber-based polymers are gradually replacing traditional insulators in outdoor applications due to their numerous advantages, in particular high hydrophobicity that is important for suppressing leakage current and hence surface flashover. However, the main problem with polymeric composites is their aging when exposed to environmental stresses causing loss of their desired properties and expected lifetime. In this work, aging behavior of three types of room temperature vulcanized silicon rubber (RTV-SiR) loaded with nano-silica and micro-ATH is studied. Samples of the materials with different specifications were fabricated and exposed to various environmental stresses in two specially designed weather chambers under both AC and bipolar DC voltages for a time period of 9000 hours. Thereafter, diagnosis was performed for identifying the degree of deterioration using several techniques. These include hydrophobicity classification, measurements of leakage current and mechanical properties, Fourier transform infrared spectroscopy, and Thermogravimetric analysis. Results of the conducted experiments indicated stronger degradation of the desired properties under positive DC stress as compared to the AC and negative DC voltages. Moreover, silicone rubber doped with nano-sized particles of silica filler demonstrated better anti-aging performance as compared to its micro-ATH filled counterpart.","PeriodicalId":15613,"journal":{"name":"Journal of Elastomers & Plastics","volume":"70 1","pages":"1091 - 1111"},"PeriodicalIF":0.0,"publicationDate":"2022-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86395729","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}

引用次数: 3

Synthesis and properties of biobased non-isocyanate aliphatic thermoplastic polyurethane elastomers with butanediurethane hard segments 丁二氨基硬段生物基非异氰酸脂族热塑性聚氨酯弹性体的合成与性能研究

Journal of Elastomers & Plastics Pub Date : 2022-09-27 DOI: 10.1177/00952443221130471

Yao Qin, Xiao-Ya Yuan, Z. Sang, Zhiyuan Zhang, Jing‐bo Zhao, Junying Zhang

引用次数: 1

Synergistic combination of 2-mercaptobenzothiazole (MBT) and nitrosoamine-safe thiuram disulfide as advanced rubber vulcanizing accelerators 2-巯基苯并噻唑(MBT)与亚硝基胺安全型二硫化硫脲的协同组合作为高级橡胶硫化促进剂

Journal of Elastomers & Plastics Pub Date : 2022-08-08 DOI: 10.1177/00952443221118636

Md Najib Alam, S. Debnath, O. Boondamnoen, K. N. Kumar, J. Kim, Jungwook Choi

{"title":"Synergistic combination of 2-mercaptobenzothiazole (MBT) and nitrosoamine-safe thiuram disulfide as advanced rubber vulcanizing accelerators","authors":"Md Najib Alam, S. Debnath, O. Boondamnoen, K. N. Kumar, J. Kim, Jungwook Choi","doi":"10.1177/00952443221118636","DOIUrl":"https://doi.org/10.1177/00952443221118636","url":null,"abstract":"In this study, we developed a combination accelerator system to synergistically improve the vulcanizing activity of 2-marcapto benzothiazole (MBT) with different nitrosamine-safe thiuram disulfides (TDs), namely, bis-(N-benzyl piperazino) thiuram disulfide (BPTD), bis-(N-phenyl piperazino) thiuram disulfide (PPTD), and bis-(N-ethyl piperazino) thiuram disulfide (EPTD), which can be used as nitrosamine-safe cross-linking accelerators for sulfur based rubber vulcanization. The results were compared with that of a conventionally unsafe TD, tetramethyl thiuram disulfide (TMTD) combined with MBT, to evaluate the efficiencies of these nitrosamine-safe TD accelerators for industrial applications. The curing and mechanical properties of rubber vulcanization were investigated to understand the synergism between MBT and nitrosoamine-safe TDs. The results indicate that novel TDs combined with MBT significantly improve the curing characteristics and mechanical properties following to the TDs with smaller molecular size and higher basicity. The MBT/BPTD system had higher modulus values because BPTD has a higher molar mass, which facilitates a better distribution of accelerators in the rubber matrix. Overall, the MBT/EPTD accelerator systems with equal molar ratios can compete with the curing rates, tensile strengths, and moduli of unsafe TMTD accelerator systems in the vulcanization of rubber.","PeriodicalId":15613,"journal":{"name":"Journal of Elastomers & Plastics","volume":"45 1","pages":"1061 - 1077"},"PeriodicalIF":0.0,"publicationDate":"2022-08-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85788294","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}

引用次数: 4

Use of Liquidambar Orientalis Mills in natural rubber compounds as an alternative to synthetic resins 在天然橡胶化合物中使用东方木作为合成树脂的替代品

Journal of Elastomers & Plastics Pub Date : 2022-07-19 DOI: 10.1177/00952443221089048

Tuba Ünügül, Metin Erenkaya, B. Karaağaç

引用次数: 0