PROPERTIES OF URETHANE ELASTOMERS .3. DEPOLARIZATION CURRENTS FROM UNSATURATED POLYURETHANES BASED ON 4,4'-DIPHENYLMETHANE DIISOCYANATE

被引：3

作者：

DIACONU, I

CIOBANU, C

SIMIONESCU, CI

机构：

来源：

EUROPEAN POLYMER JOURNAL | 1990年 / 26卷 / 05期

关键词：

D O I：

10.1016/0014-3057(90)90211-L

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 dielectric relaxation processes in polyurethanes based on 4,4′-diphenylmethane diisocyanate (MDI) and both saturated and unsaturated polyesters were studied in the range 240-410 K using thermally stimulated depolarization currents method (TSDC). The structure of the TSDC spectra and the location and intensity of the constituent peaks depend both on the urethane content and thermal history of the polymer. The relaxation processes have been associated with the molecular motions within domains with distinct hard segment concentrations. © 1990.

引用

页码：571 / 573

页数：3