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阻燃协效剂对PVC/PNBR共混型热塑性弹性体性能的影响 总被引:2,自引:0,他引:2
以PVC和粉末丁腈橡胶(PNBR)为主体材料,氢氧化镁为阻燃剂,制备PVC/PNBR共混型热塑性弹性体,研究阻燃协效剂三氧化二锑、硼酸锌、七钼酸铵、氧化锌和二氧化锰对弹性体性能的影响。结果表明,当PVC、PNBR、邻苯二甲酸二辛酯和氢氧化镁的用量分别为77,23,50和31份时,PVC/PNBR共混型热塑性弹性体性能良好;氢氧化镁的用量对弹性体氧指数基本无影响;在弹性体中分别单独使用4.6,6.2,1.5和6.2份三氧化二锑、硼酸锌、七钼酸铵和氧化锌时,弹性体的氧指数明显提高,综合物理性能较好,但二氧化锰协同效果不好。 相似文献
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对PVC/PNBR热塑性弹性体机械共混体系和动态硫化体系的耐热性进行了研究,分别讨论了其静态热氧老化和动态热剪切老化对体系性能的影响。实验表明,PVC/PNBR体系具有较好的耐热性。 相似文献
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均匀设计法在制备PNBR/HPVC热塑性弹性体中的应用 总被引:2,自引:0,他引:2
运用均匀设计方法考察了酚醛树脂和氯化亚锡复合硫化剂对粉末丁腈橡胶(PNBR)/高聚合度聚氯乙烯(HPVC)热塑性弹性体力学性能的影响。通过回归分析发现:酚醛树脂的用量大于1份时,PNBR/HPVC热塑性弹性体的力学性能主要受氯化亚锡用量的影响;并进一步验证了氯化亚锡对PNBR/HPVC热塑性弹性体的硫化作用。 相似文献
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软质聚氯乙烯中增塑剂含量的定量分析研究 总被引:5,自引:0,他引:5
以丙酮、乙醚、正己烷和甲醇为萃取剂,萃取聚氯乙烯(PVC)/粉末丁腈橡胶(PNBR)热塑性弹性体制品和软质聚氯乙烯制品。考察了4种有机溶剂萃取增塑剂的效果及萃取时间对萃取效果的影响。实验结果表明:乙醚作为萃取聚氯乙烯/粉末丁腈橡胶热塑性弹性体、软质聚氯乙烯制品中增塑剂的溶剂最为合适,萃取时间为12h。 相似文献
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以聚氯乙烯(PVC)和胶粉为主要原料,采用共混的方法制备了PVC/胶粉热塑性弹性体,研究了胶粉的改性剂、PVC的改性剂和胶粉的用量等对PVC/胶粉热塑性弹性体性能的影响,并与国标GB/T 18173.1–2012所要求的性能进行比对。研究结果表明,使用橡胶再生剂RV改性胶粉所制得的PVC/胶粉热塑性弹性体综合性能最优;使用乙烯–乙酸乙烯酯塑料(EVAC)、苯乙烯–丁二烯–苯乙烯塑料(SBS)改性PVC时,EVAC的改性效果优于SBS,使用15份EVAC所制得的PVC/胶粉热塑性弹性体具有更佳的力学性能、耐老化性能,且满足国标要求;随着胶粉用量的增加,PVC/胶粉热塑性弹性体的综合力学性能下降,耐老化性能提高,使用30份改性胶粉时性价比最高,同时满足国标GB/T 18173.1–2012要求。 相似文献
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Blends of polyvinyl chloride/epoxidized natural rubber (PVC/ENR) blends were studied. Their rheological properties were studied with a Brabrender Plasticorder. It was found that the rheological properties of any PVC/ENR blends are governed by their blending conditions. To ensure homogenous PVC/ENR blends, adequate and suitable blending conditions must be utilized. PVC thermoplastics phases enhances rigidity while ENR rubbery phases imparts flexibility and processability to the blends. With premixing, Ba/Cd/Zn-based PVC stabilizer is effective in stabilizing the PVC/ENR blends. Their properties are further enhanced by the addition of curatives. 相似文献
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丁腈橡胶/聚氯乙烯共混胶 总被引:5,自引:1,他引:4
探讨了丁腈橡胶(NBR)中的结合丙烯腈质量分数、NBR/聚氯乙烯(PVC)(质量比,下同)、增塑剂邻苯二甲酸二辛酯(DOP)用量、PVC聚合度对NBR/PVC共混胶性能的影响,研究了NBR/低聚合度PVC共混胶的力学性能及加工流动性能。结果表明,随着NBR中结合丙烯腈质量分数的增加,NBR/PVC共混胶的耐油性能明显增强,力学性能也相应有所改善;NBR/PVC为80/20~60/40时.NBR/PVC共混胶的综合性能较好;DOP用量对NBR/PVC共混胶性能的影响不大;聚合度为700的PVC更适合于生产NBR/PVC共混胶,其力学性能、加工流动性能、耐老化性能与德国Bayer公司生产的牌号为Perbunan NT/VC3470B的NBR/PVC共混胶相当。 相似文献
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Blends of poly(vinyl chloride) (PVC) with different copolymers have been studied to obtain a plasticized PVC with improved properties and the absence of plasticizer migration. The copolymers used as plasticizers in the blends were acrylonitrile butadiene rubber, ethylene vinyl acetate (EVA), and ethylene-acrylic copolymer (E-Acry). Blends were studied with regard to their processing, miscibility, and mechanical properties, as a function of blend and copolymer composition. The results obtained were compared with those of equivalent compositions in the PVC/dioctyl phthalate (DOP) system. Better results than PVC/DOP were obtained for PVC/acrylonitrile butadiene rubber blends. The plasticizing effect on PVC of EVA and E-Acry copolymers was similar to that of DOP. It is shown that crosslinking PVC/E-Acry blends or increasing the vinyl acetate content in PVC/EVA blends, are alternatives that can increase the compatibility and mechanical properties of these blends. © 2000 John Wiley & Sons, Inc. J Appl Polym Sci 75: 1303–1312, 2000 相似文献