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首页> 外文期刊>Journal of Applied Polymer Science >CHARACTERIZATION OF MICROSTRUCTURE AND FRACTURE BEHAVIOUR OF POLYPROPYLENE ELASTOMER BLENDS CONTAINING SMALL CRYSTAL IN ELASTOMERIC PHASE
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CHARACTERIZATION OF MICROSTRUCTURE AND FRACTURE BEHAVIOUR OF POLYPROPYLENE ELASTOMER BLENDS CONTAINING SMALL CRYSTAL IN ELASTOMERIC PHASE

机译：弹性相中包含小晶体的聚丙烯弹性体共混物的微观结构和断裂行为

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摘要

Fracture behavior of polypropylene (PP)/ethylene-propylene-rubber (EPR) blends containing small crystal in elastomeric phase was investigated. Various ethylene-alpha-olefin copolymers (ECP) were used as crystal components and put into the elastomer phase of the blends. The crystallite size was controlled by changing the composition of the ECP. From thermal analysis and electron microscopic analysis, it was found that the ECP having a smaller crystal had better affinity to EPR and thus the crystal was finely dispersed in the elastomeric phase. The ECP with large crystallite size had poorer affinity to EPR and tended to segregate in the elastomeric phase. Scratch resistance and tensile elongation of blends were measured and it was found that the small crystal drastically improved the above properties while the large crystal deteriorated them. The dispersed small crystal was thought to act as a crosslinking point in the elastomeric phase. The reinforcement of the elastomeric phase by such quasi-crosslinking structure was the possible reason for the improvement of the mechanical properties of the blends. (C) 1995 John Wiley and Sons, Inc. [References: 6]
机译：研究了在弹性相中含有小晶体的聚丙烯（PP）/乙烯-丙烯-橡胶（EPR）共混物的断裂行为。各种乙烯-α-烯烃共聚物（ECP）用作晶体组分，并放入共混物的弹性体相中。通过改变ECP的组成来控制微晶尺寸。从热分析和电子显微镜分析发现，具有较小晶体的ECP对EPR具有更好的亲和力，因此晶体细分散在弹性体相中。具有大晶粒尺寸的ECP对EPR的亲和力较差，并且倾向于在弹性体相中偏析。测量了混合物的耐刮擦性和拉伸伸长率，发现小晶体极大地改善了上述性能，而大晶体使它们劣化。认为分散的小晶体充当弹性体相中的交联点。通过这种准交联结构增强弹性体相是改善共混物机械性能的可能原因。 （C）1995 John Wiley and Sons，Inc. [参考：6]

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