STUDY OF SECONDARY RELAXATIONS OF POLYETHYLENE BY PHOTOLUMINESCENCE TECHNIQUE

被引：21

作者：

ATVARS, TDZ

SABADINI, E

MARTINSFRANCHETTI, SM

机构：

[1] Instituto de Quimica, Universidade Estadual de Campinas, 13081-970 Campinas

来源：

EUROPEAN POLYMER JOURNAL | 1993年 / 29卷 / 09期

基金：

巴西圣保罗研究基金会;

关键词：

D O I：

10.1016/0014-3057(93)90159-D

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

Secondary gamma and beta relaxations in polyethylene have been studied by photoluminescence of molecular probes dispersed in the polymer. The temperature of the gamma relaxation of low density polyethylene has been determined as -130-degrees-C by the phosphorescence emission of benzophenone. The temperature of the beta relaxation of the same polymer has been found to be -40-degrees-C by the fluorescence emission of anthracene. From the differences in the quenching processes for the phosphorescence and fluorescence of the molecular probes, it should be possible to discuss the mechanisms of both the gamma and beta relaxations depending on the size of the macromolecular segments involved in each process

引用

页码：1259 / 1264

页数：6

共 36 条

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