PHOTODEGRADATION OF POLYIMIDES .4. MECHANISM FOR THE PHOTOOXIDATION PROCESS BASED ON A MODEL-COMPOUND

被引：27

作者：

HOYLE, CE ^{[1
]}

CREED, D ^{[1
]}

NAGARAJAN, R ^{[1
]}

SUBRAMANIAN, P ^{[1
]}

ANZURES, ET ^{[1
]}

机构：

[1] UNIV SO MISSISSIPPI,DEPT CHEM & BIOCHEM,HATTIESBURG,MS 39406

来源：

POLYMER | 1992年 / 33卷 / 15期

关键词：

PHOTODEGRADATION; POLYIMIDES; PHOTOOXIDATION PROCESS;

D O I：

10.1016/0032-3861(92)90229-P

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

Based on analysis of the photochemistry of a model compound, N-phenylphthalimide, the photolysis of a polyimide derived from 4,4'-oxydianiline (ODA) and a diarylanhydride with a hexafluorinated isopropylidine bridging group (6F) is proposed to proceed via formation of a phthalic anhydride type photoproduct. The quantum yield for product formation of N-phenylphthalimide is quite low ( < 10(-3)) indicating a rather inefficient first step in the overall oxidative degradation process. However, based on the efficiency of the photo-oxidation of the primary photoproducts, a process leading to the ultimate failure and complete ablation of the 6F-ODA films in air upon exposure to the unfiltered output of a mercury lamp is postulated.

引用

页码：3162 / 3168

页数：7

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