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首页> 外文期刊>Journal of Applied Polymer Science >CRYSTALLINITY AND MECHANICAL PROPERTIES OF PP-HOMOPOLYMERS AS INFLUENCED BY MOLECULAR STRUCTURE AND NUCLEATION
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CRYSTALLINITY AND MECHANICAL PROPERTIES OF PP-HOMOPOLYMERS AS INFLUENCED BY MOLECULAR STRUCTURE AND NUCLEATION

机译：分子结构和成核对PP均聚物的结晶度和力学性能的影响

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摘要

The evolution of crystallinity and mechanical properties of two different series of PP-homopolymers (RE grades coming directly from the polymerization reactor and CR grades priorly subjected to a defined degradation process) as influenced by the molar mass and heterogeneous nucleation was investigated, including one highly isotactic material to check the tacticity influence. In principle, the effects seem explainable by differences in the number of nuclei and the spherulithic growth speed, which were determined separately. The nucleation effects are similar for all materials, but strongly dependent of the molar mass of the materials. Apart from the bulk material properties, also the development of shear-induced structures is strongly influenced by molar mass and nucleation, contributing additionally to mechanics. (C) 1996 John Wiley & Sons, Inc. [References: 39]
机译：研究了两种不同系列的PP均聚物（直接来自聚合反应器的RE级和先经过确定的降解过程的CR级）的结晶度和机械性能的变化，其受摩尔质量和非均相成核的影响，其中包括等规物质来检查战术性影响。原则上，这种影响似乎可以通过分别确定的核数和球生长速度的差异来解释。对于所有材料，成核作用都相似，但在很大程度上取决于材料的摩尔质量。除了块状材料的特性，剪切诱导结构的发展还受到摩尔质量和成核作用的强烈影响，从而进一步增加了力学性能。 （C）1996 John Wiley＆Sons，Inc. [参考：39]

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