Crystallization behavior of polypropylene/ethylene butene copolymer blends
Crystallization behavior of polypropylene/ethylene butene copolymer blends
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DOI：
10.1002/app.35184
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发表时间：
2012-12
影响因子：
3
通讯作者：
Jinhai Yang;James L White
中科院分区：
文献类型：
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作者：
Jinhai Yang;James L White
将一种聚丙烯(PP)与两种乙烯-丁烯共聚物(EBM)共混。EBM1的丁烯摩尔分数为12.5%，与PP不相容。EBM2中丁烯的摩尔分数为51.6%，与PP具有良好的相容性。分散在EBM1中的PP表现出分级结晶行为，结晶温度在45℃左右，等温结晶速度比纯PP慢得多。在EBM2中，PP没有表现出分级结晶行为。EBM1并不降低连续PP的结晶温度和熔融温度。然而，EBM2可以同时降低这两种温度。结果表明，EBM2能很大程度上抑制PP的层状外延分支。2012 Wiley期刊，Inc.《应用波利姆科学》，2012
One polypropylene (PP) was mixed with two ethylene butene copolymers (EBM). EBM1 had 12.5 mol % of butene and was immiscible with the PP. EBM2 had 51.6 mol % of butene and was miscible with the PP. The dispersed PP in EBM1 showed fractionalized crystallization behavior with a crystallization temperature at around 45°C and a much slower isothermal crystallization rate comparing to the neat PP. The PP did not exhibit fractionalized crystallization behavior in EBM2. EBM1 did not decrease both the crystallization and melting temperatures of the continuous PP. However, EBM2 could decrease both the two temperatures. It was found that EBM2 could largely suppress the epitaxial lamellar branching of the PP. © 2012 Wiley Periodicals, Inc. J Appl Polym Sci, 2012