In situ FTIR spectroscopic study of the conformational change of isotactic polypropylene during the crystallization process

被引：132
|
作者：
Zhu, XY [1 ]
Yan, DY [1 ]
Fang, YP [1 ]
机构：
[1] Shanghai Jiao Tong Univ, Inst Polymer Mat, Coll Chem & Chem Technol, Shanghai 200240, Peoples R China
来源：
JOURNAL OF PHYSICAL CHEMISTRY B | 2001年 / 105卷 / 50期
关键词：
D O I：
10.1021/jp012165f
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
The conformational change of isotactic polypropylene (iPP) during the crystallization process has been carefully Studied by Fourier transform infrared (FTIR) spectroscopy. The experimental measurements show that the iPP melt system is stable when the persistence length of helical sequences is less than 12 monomer units. As soon as the helix length exceeds 12 monomer units, the 3(1) helix conformation extends quickly and then crystallization occurs. These results are discussed in terms of Imai's microphase separation theory. It can be found that the experimental observation agrees very well with Imai's theory.
引用
收藏
页码：12461 / 12463
页数：3
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