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NBR/有机改性膨润土复合材料的结构和性能及其对PVC的增韧作用 总被引:5,自引:0,他引:5
研究NBR/有机改性膨润土复合材料的结构、性能及其对PVC的增韧作用。采用X射线衍射仪、透射电子显微镜和扫描电子显微镜观察复合材料的微观结构发现,NBR大分子可插层进入有机改性膨润土层间。有机改性膨润土填充NBR硫化胶的物理性能优于未改性膨润土填充胶,10份有机改性膨润土的补强效果可达到30份炭黑N330的水平。NBR/有机改性膨润土复合材料对PVC的增韧效果优于NBR,且能保持较高的拉伸强度和弯曲强度。 相似文献
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详细分析了PVC树脂外皮膜结构,粒径大小及分布,表观密度,孔隙率与增塑剂吸收量对树脂加工性能的影响,提出了PVC树脂的不同颗粒结构适于不同的加工方法和用途。 相似文献
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改性凹凸棒土填充硬质PVC的制备与性能研究 总被引:15,自引:2,他引:15
用硅烷偶联剂甲基丙烯酰氧丙基三甲氧基硅烷(MPTMS)和甲基丙烯酸甲酯(MMA)和凹凸棒土(AT)进行表面接枝改性,用傅立叶红外光谱分析了改性凹凸棒土的表面化学结构。以改性的凹凸棒土填充硬质聚氯乙烯(PVC),测试了材料的力学性能和热性能,结果表明,改性凹凸棒的填充可使PVC复合材料的拉伸强度,缺口冲击强度,弯曲强度,弯曲模量和热稳定性等均有所提高,用透射电镜观察了凹凸棒土及其在PVC基体中的微观分散状况,凹凸棒上具有纳米尺寸的针状结构,在PVC基体中以直径20nm-60nm,长度100nm-500nm的短纤维状分散在其中。 相似文献
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稀土稳定剂在PVC中的应用性能 总被引:3,自引:0,他引:3
研究了一种新型稳定剂即稀土稳定剂在聚氯乙烯(PVC)加工中的应用特点,研究表明,该稀土稳定剂具有优异的热稳定性,独特的促进加工熔融,偶联增容及内增韧作用,良好的透明性、初期有色性及估异的耐候性能,高效,无毒,无味、无放射性,可完全取代铅、镉、钡等金属盐类稳定剂。 相似文献
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采用机械共混法和乳液共沉法制备了NBR/PVC共混胶,通过差示扫描量热仪(DSC)和场发射扫描电子显微镜(FE-SEM)对共混胶的微观形貌、结构进行了表征,考察了共混方式和共混胶配比对其力学性能的影响,并比较了共混胶、CPE、P-83对硬质/软质PVC的改性效果。结果表明:①与机械共混胶相比,乳液共沉胶混合得更均匀,分散性更好,其分子级混合程度更好;②乳液共沉胶试样的力学性能在总体上优于机械共混胶;③对于硬质PVC,CPE的改性效果优于其他改性剂;④对于软质PVC,乳液共沉胶的改性效果最好,特别是对撕裂强度的提高非常明显。 相似文献
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An earlier paper (1) established the need for new compounding technology to deal with changes in melt flow resulting from the postchlorination of PVC resins. The present work attacks the more-than-doubled melt viscosity of chlorinated PVC as measured in stabilized resin. The potential for marked reduction in viscosity. improvement in processing stability, and retention of marketable product properties is explored. The development process including the definition of performance requirements, test methods used, and resulting balance of properties is described. 相似文献
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以氯乙烯-丙烯酸丁酯共聚物[P(V-B)]作为PVC和高密度聚乙烯(HDPE)的增容剂,研究讨论了共混物的相容性及其加工性能,并在此基础上研制了以P(V-B)为增容剂的PVC/HDPE共混材料,进而研究了共混材料的力学性能。结果表明:合适配比的共混体系具有良好的相容性、塑化效果和流动性能,明显改善了PVC的加工性能,并在拉伸强度、弯曲强度等具有较高保持率的前提下,显著地提高了材料的冲击性能。 相似文献
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The aim of this study is to improve the performance of blends made from recycled polyvinyl chloride (PVC), coming from credit card waste, so that these blends can be used for those applications that must fulfil some requirements with regard to mechanical properties and stability with temperature alterations. With this aim in mind, two polymers of styrenic origin have been combined: styrene acrylonitrile (SAN) and acrylonitrile butadiene styrene (ABS). These polymers are characterized by a satisfactory balance of mechanical properties and thermal stability. PVC blends with both virgin and recycled styrenic polymers have been studied throughout the entire range of compositions. The prior degradation of the recycled materials has been studied by means of Fourier transformed infrared spectroscopy (FTIR).The behavior of the observed Tg values has been analyzed using differential scanning calorimetry (DSC), and the existence of partial miscibility between the different components has been studied. The mechanical properties have been determined using tensile and Charpy impact tests. The thermal stability of the PVC blends with temperature changes has been determined using the Vicat softening temperature (VST). Finally, the fracture surface of the various blends has been analyzed using scanning electron microscopy (SEM). © 2006 Wiley Periodicals, Inc. J Appl Polym Sci 101: 2464–2471, 2006 相似文献