Observation of Regime III Crystallization in Polyethylene/Montmorillonite Nanocomposites
Observation of Regime III Crystallization in Polyethylene/Montmorillonite Nanocomposites
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DOI：
10.1002/marc.200400595
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发表时间：
2005-04
影响因子：
4.6
通讯作者：
Junting Xu;Yan‐Qin Zhao;Qi Wang;Zhiqiang Fan
中科院分区：
文献类型：
--
作者：
Junting Xu;Yan‐Qin Zhao;Qi Wang;Zhiqiang Fan
采用原位聚合法制备了剥离型和插层型聚乙烯/蒙脱土（PE/MMT）纳米复合材料。采用Lauritzen-Hoffman理论分析了纳米复合材料的等温结晶动力学。在线性聚乙烯中很难观察到的III区结晶出现在PE/MMT纳米复合材料中。PE/ MMT纳米复合材料的III态结晶温度范围较宽，这表明MMT极大地降低了PE链的迁移率和重复能力，特别是在嵌入的纳米复合材料中。
Exfoliated and intercalated polyethylene/montmorillonite (PE/MMT) nanocomposites with high MMT content were prepared by in situ polymerization. The isothermal crystallization kinetics of the nanocomposites were analyzed with Lauritzen-Hoffman regime theory. Regime III crystallization, which is difficult to observe in linear polyethylene, appears in the PE/MMT nanocomposites. The broader temperature range of regime III crystallization in PE/ MMT nanocomposites shows that the mobility and reptation ability of the PE chains are greatly reduced by the MMT, especially in the intercalated nanocomposite.