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首页> 外文期刊>Journal of Applied Polymer Science >Crystallization kinetics of maleic anhydride-modified iPP studied by POM
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Crystallization kinetics of maleic anhydride-modified iPP studied by POM

机译：POM研究马来酸酐改性iPP的结晶动力学

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摘要

Melt nucleation and crystallization behavior of homo-isotatic polypropylene (homo-iPP), maleic anhydride (MAH)-grafted-iPP, and MAH-modified IPP, produced from iPP and a small amount of MAH-grafted-iPP, was investigated by polarizing optical microscopy (POM), at T-c = 121-135 degrees C. Nucleation processes at a given T-c were faster for modified PP as compared to neat iPP. The induction time for nucleation increased nonlinearly with increasing T-c and decreased for modified PP, probably as a result of promoted heterogeneous nucleation due to the presence of carbonyl groups of MAH-grafted-PP. The average spherulite sizes were decreased by modification, and the growth rate was enhanced in maleated PP and modified PP. The induction time approach was applied to the results obtained by POM to compare the tendency for heterogeneous nucleation of neat and MAH-modified PP. (C) 2000 John Wiley & Sons, Inc. [References: 11]
机译：通过极化研究了均聚聚丙烯（均质iPP），接枝马来酸酐（MAH）-iPP和由iPP和少量MAH-接枝-iPP生产的MAH改性IPP的熔体成核和结晶行为光学显微镜（POM），Tc = 121-135℃。与纯iPP相比，改性PP在给定Tc下的成核过程更快。成核的诱导时间随T-c的增加而非线性增加，而对于改性PP则减少，这可能是由于MAH接枝PP的羰基的存在促进了异质成核的结果。通过改性降低了平均球晶尺寸，并提高了马来酸化PP和改性PP的生长速率。将诱导时间方法应用于通过POM获得的结果，以比较纯净和MAH改性的PP异质成核的趋势。 （C）2000 John Wiley＆Sons，Inc. [参考：11]

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