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首页> 外文期刊>Journal of Applied Polymer Science >Dynamic mechanical behavior analysis for low ethylene content polypropylene copolymers
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Dynamic mechanical behavior analysis for low ethylene content polypropylene copolymers

机译：低乙烯含量聚丙烯共聚物的动态力学行为分析

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Dynamic mechanical behavior of low ethylene content propylene-ethylene copolymers was studied. It was found that there exists ethylene-propylene rubber component in the block copolymer, which is accordance with the component analysis. It is suggested that it is because of the existence of the ethylene-propylene rubber component that the block copolymer exhibits high impact strength. The relaxation temperature shifted to lower temperature for copolymers compared with homopolymer, and the damping peak was broadened by copolymerization, consistent with the increased chemical heterogeneity of the copolymers. Effects of thermal history and frequency on the relaxations were studied. The activation enthalpy for relaxation was determined. (C) 1998 John Wiley & Sons, Inc. [References: 9]
机译：研究了低乙烯含量丙烯-乙烯共聚物的动态力学行为。发现在嵌段共聚物中存在乙丙橡胶组分，这与组分分析一致。据认为，由于乙烯-丙烯橡胶组分的存在，嵌段共聚物表现出高冲击强度。与均聚物相比，共聚物的弛豫温度转移到更低的温度，并且通过共聚作用，阻尼峰变宽，这与共聚物的化学不均一性增加相一致。研究了热历史和频率对弛豫的影响。确定用于松弛的活化焓。 （C）1998 John Wiley＆Sons，Inc. [参考：9]

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