NUCLEAR MAGNETIC-RELAXATION OF MODIFIED POLY(P-PHENYLENE SULFIDE)

被引：3
|
作者：
JURGA, J
HRUSZKA, P
机构：
[1] Polymer Processing Laboratory, Technical University of Poznań
来源：
POLYMER | 1993年 / 34卷 / 10期
关键词：
POLY(P-PHENYLENE SULFIDE); NMR; RELAXATION; THERMAL TREATMENT;
D O I：
10.1016/0032-3861(93)90733-Q
中图分类号：
O63 [高分子化学（高聚物）];
学科分类号：
070305 ; 080501 ; 081704 ;
摘要：
The influence of controlled purification and thermal treatment on the nuclear magnetic relaxation of poly(p-phenylene sulfide) (PPS) has been studied. The temperature dependence of spin-lattice relaxation times at 30 and 90 MHz in modified samples has been measured. High temperature annealing leads to an increase in the number of paramagnetic centres, which are most probably radical cations, and to the observed increase in molecular weight of PPS. Sustained purification and degassing of PPS causes the removal of low molecular weight oligomers and paramagnetic oxygen. This effect leads to non-exponential magnetization recovery.
引用
收藏
页码：2072 / 2074
页数：3
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