PHOTOSENSITIZED CATIONIC POLYMERIZATION USING N-ETHOXY-2-METHYLPYRIDINIUM HEXAFLUOROPHOSPHATE

被引：85

作者：

YAGCI, Y ^{[1
]}

LUKAC, I ^{[1
]}

SCHNABEL, W ^{[1
]}

机构：

[1] HAHN MEITNER INST KERNFORSCH BERLIN GMBH,BEREICH S,GLIENICKER STR 100,W-1000 BERLIN 39,GERMANY

来源：

POLYMER | 1993年 / 34卷 / 06期

关键词：

PHOTOINITIATED CATIONIC POLYMERIZATION; PYRIDINIUM SALTS; PHOTOSENSITIZATION; CYCLOHEXENE OXIDE;

D O I：

10.1016/0032-3861(93)90762-y

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 cationic polymerization of cyclohexene oxide is initiated at room temperature upon irradiation at lambda(inc) > 350 nm of CH2Cl2 solutions containing N-ethoxy-2-methylpyridinium hexafluorophosphate (EMP+PF6-) and one of the following compounds: thioxanthone, anthracene, perylene or phenothiazine. Poly(cyclohexene oxide) of molar mass exceeding 10(5) is produced. In the absence of EMP+PF6-, which is transparent at lambda(inc) > 350 nm, these sensitizers are ineffective. Acetophenone and benzophenone do not act as sensitizers. An initiation mechanism involving electron transfer from the excited sensitizers to EMP+ ions is proposed. In flash photolysis experiments, electron transfer was evidenced by the formation of radical cations in the cases of anthracene, perylene or phenothiazine.

引用

页码：1130 / 1133

页数：4

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