Degradation of outdoor exposed poly(1-trimethylsilyl)-1-propyne

被引：7
|
作者：
Gallo, R
Pegoraro, M
Severini, F
Ipsale, S
Nisoli, E
机构：
[1] Politecn Milan, Dipartimento Chim Ind & Ingn Chim G Natta, I-20133 Milan, Italy
[2] Univ Messina, Dipartimento Chim Ind, I-98100 Messina, Italy
[3] Assessorato Ambiente, I-98100 Messina, Italy
来源：
POLYMER DEGRADATION AND STABILITY | 1997年 / 58卷 / 03期
关键词：
D O I：
10.1016/S0141-3910(97)00046-3
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 outdoor ageing of poly(1-trimethylsilyl)-1-propyne (PTMSP) membranes has been studied mainly by means of differential scanning calorimetry (DSC), thermogravimetry, viscosimetry and infra-red spectroscopy. Membranes lose their integrity within 288 h of exposure. After exposure for 192 h the oxidation time at 523 K decreases from 25 to 0.5 min, while the starting temperature of degradation, as measured by DSC, changes from 543 K to 393 K and the viscosimetric molecular weight decreases five times. The high speed of the photodegradation process can be accounted for by the high oxygen solubility of this polymer. (C) 1997 Elsevier Science Limited.
引用
收藏
页码：247 / 250
页数：4
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