MECHANICAL DEGRADATION OF POLYPROPYLENE - EFFECT OF UV IRRADIATION

被引：40
作者：
BAUMHARDTNETO, R
DEPAOLI, MA
机构：
[1] UNIV ESTADUAL CAMPINAS,INST QUIM,CX POSTAL 6154,BR-13081 CAMPINAS,SP,BRAZIL
[2] UNIV FED RIO GRANDE SUL,INST QUIM,BR-91500 PORTO ALEGRE,RS,BRAZIL
来源：
POLYMER DEGRADATION AND STABILITY | 1993年 / 40卷 / 01期
基金：
巴西圣保罗研究基金会;
关键词：
Aging of materials - Degradation - Mechanical properties - Photochemical reactions - Plastic films - Radiation effects - Stress relaxation - Ultraviolet radiation;
D O I：
10.1016/0141-3910(93)90191-K
中图分类号：
O63 [高分子化学（高聚物）];
学科分类号：
070305 ; 080501 ; 081704 ;
摘要：
In studies of polymer degradation, one relates physical and chemical property changes to ageing conditions under the effect, usually, of a single initiating process. In order to study the possible existence of associated effects in the combined photo and mechanical degradation of polypropylene, the behavior of oriented and non-oriented film samples irradiated under load have been investigated, as well as the effect of UV-irradiation on samples being mechanically tested. Results indicate the existence of photo-tribo-chemical effects which have been detected by stress relaxation and stress-strain measurements, and by carbonyl index determinations.
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页码：59 / 64
页数：6
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