PHOTO-POLYMERIZATION OF METHYL-METHACRYLATE SENSITIZED BY ALIPHATIC-KETONES

被引：15

作者：

LISSI, EA

ENCINA, MV

ABARCA, MT

机构：

来源：

JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY | 1979年 / 17卷 / 01期

关键词：

D O I：

10.1002/pol.1979.170170103

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 the reported experiments, the polymerization of methyl methacrylate photosensitized by several alkyl ketones has been investigated. It was found that alkyl ketones can induce the free radical polymerization of the monomer with an efficiency that increases when the triplet lifetime decreases. For ketones of similar triplet lifetime those decomposing predominantly by a type I photocleavage show greater initiation efficiencies than those that react by a type II mechanism. The results obtained show that quenching of the excited ketones by the monomer does not induce polymerization. For ketones bearing gamma -hydrogens the initiation is due to the 1,4-biradical produced by intramolecular hydrogen abstraction.

引用

页码：19 / 26

页数：8

共 21 条

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