A scattering study of nucleation phenomena in polymer crystallisation

被引：87

作者：

Ryan, AJ ^{[1
]}

Fairclough, JPA

Terrill, NJ

Olmstead, PD

Poon, WCK

机构：

[1] Univ Sheffield, Dept Chem, Sheffield S3 7HF, S Yorkshire, England

[2] CCLRC Daresbury Lab, Warrington WA4 4AD, Cheshire, England

[3] Univ Leeds, Dept Phys, Leeds LS 9JT, W Yorkshire, England

[4] Univ Edinburgh, Dept Phys & Astron, Edinburgh EH9 3JZ, Midlothian, Scotland

来源：

FARADAY DISCUSSIONS | 1999年 / 112卷

关键词：

D O I：

10.1039/a900246d

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 mechanism of primary nucleation in polymer crystallisation has been investigated experimentally and theoretically. Two types of experiments have been performed on polypropylene, polyethylene, and poly(ethylene terpthalate). Crystallisations with long induction times, studied by small and wide angle X-ray scattering (SAXS and WAXS), reveal the onset of large scale ordering prior to crystal growth. Rapid crystallisations studied by melt extrusion indicate the development of well resolved oriented SAXS patterns associated with large scale order before the development of crystalline peaks in the WAXS region. The results suggest pre-nucleation density fluctuations play an integral role in polymer crystallisation. A theoretical model has been developed which qualitatively describes the experimental results.

引用

页码：13 / 29

页数：17