DEGRADATION MECHANISMS OF POLY(VINYL FLUORIDE) FILMS

被引：10

作者：

FARNETH, WE ^{[1
]}

ARONSON, MT ^{[1
]}

USCHOLD, RE ^{[1
]}

机构：

[1] DUPONT CO INC,DUPONT POLYMERS,WILMINGTON,DE 19880

来源：

MACROMOLECULES | 1993年 / 26卷 / 18期

关键词：

20;

D O I：

10.1021/ma00070a006

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 mechanism of degradation of poly(vinyl fluoride) films in both oxidative and nonoxidative environments has been examined. In nonoxidative environments, the homogeneous pyrolysis of related small molecules like 2-fluoropropane or 2-fluoropentane constitutes a useful model for both the product distributions and the rates. The oxidative chemistry, however, occurs at much lower temperatures and will dominate the degradation mechanism at even small partial pressures of oxygen. It is a radical chain process leading to oxygen incorporation in the polymer, main chain cleavage, and formation of new acyl fluoride chain ends. HF is formed in both mechanisms. In the oxidative chemistry, a plausible route to HF is the hydrolysis of acyl fluorides by water vapor generated in situ.

引用

页码：4765 / 4769

页数：5