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首页> 外文期刊>Polymers for advanced technologies >Ordered long-helical conformation of isotactic polypropylene obtained in constrained environment of nanoclay
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Ordered long-helical conformation of isotactic polypropylene obtained in constrained environment of nanoclay

机译：在纳米粘土的约束环境中获得的等规聚丙烯的有序长螺旋构象

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摘要

Special crystallization event of isotactic polypropylene (iPP) in a constrained environment, a layered clay network, was followed by in situ Fourier transform infrared (FTIR) spectroscopy during the cooling process. Before occurrence of nucleation/crystallization, a conformationally ordered phase, which consists of significant amounts of long 31 helices with 14 monomeric units, has been identified for the first time. More importantly, it was found that the long-ordering helices could play a more important role than short ones for the confined crystallization. It could be tentatively explained as due to the existence of constrained regions in the proximity of the nanoclay platelets or tactoids and the heterogeneous nucleation capability of the surface of nanoclay.
机译：在受限环境中，层状粘土网络中，等规聚丙烯（iPP）发生了特殊的结晶事件，然后在冷却过程中进行了原位傅立叶变换红外（FTIR）光谱分析。在发生成核/结晶之前，首次鉴定出构象有序的相，其由大量的长的31个螺旋和14个单体单元组成。更重要的是，发现对于有限的结晶，长螺旋比短螺旋起着更重要的作用。可以初步解释这是由于纳米粘土薄片或触针附近存在受约束的区域以及纳米粘土表面的异相成核能力。

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