Component analysis of proton NMR spectra of linear polyethylene in the α‐transition temperature range and phase distribution
作者:
Fumitaka Horii,
Ryozo Kitamaru,
期刊:
Journal of Polymer Science: Polymer Physics Edition
(WILEY Available online 1981)
卷期:
Volume 19,
issue 1
页码: 109-120
ISSN:0098-1273
年代: 1981
DOI:10.1002/pol.1981.180190109
出版商: John Wiley&Sons, Inc.
数据来源: WILEY
摘要:
AbstractBroad‐line1H NMR spectra of linear polyethylene at temperatures in the α‐transition range can be analyzed in terms of contributions from the crystalline and noncrystalline components provided molecular motion in the crystalline region is adequately considered. The spectrum of solidn‐C32H66orn‐C44H90prior to melting is used to take account of the contribution of the crystalline region of the polymer to molecular motions. The temperature dependence of the component distribution in the polymer is briefly discussed for a wide range of temperatures, together with previously reported results at low temperatures. The noncrystalline component is in a rigid glassy state at very low temperatures but with rising temperature it transforms to a mobile glassy state with restricted molecular motion, and transforms partially to the rubbery state at high temperature. The crystalline component remains rigid at low temperature, but some molecular motion is associated with it at higher temperatures in the α‐trans
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