PHOTO-CROSS-LINKING OF SILICONES .5. PHOTOINDUCED POLYMERIZATION OF SILICONE WITH PENDANT ACRYLATE GROUPS IN THE PRESENCE OF OXYGEN

被引：16

作者：

MULLER, U ^{[1
]}

TIMPE, HJ ^{[1
]}

NEUENFELD, J ^{[1
]}

机构：

[1] TECH UNIV CARL SCHORLEMMER LEUNA MERSEBURG,OTTO NUSCHKE STR,W-4200 MERSEBURG,GERMANY

来源：

EUROPEAN POLYMER JOURNAL | 1991年 / 27卷 / 07期

关键词：

D O I：

10.1016/0014-3057(91)90146-F

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 photo-induced crosslinking of a silicone containing pendant acrylate groups has been investigated with photocalorimetric and sol-gel measurements, and by means of postpolymerization experiments. The silicone acrylate can be crosslinked using benzoin derivatives and benzil ketals as photo-initiators. Excited benzophenone acts only in the presence of hydrogen-siloxanes, because of an efficient hydrogen abstraction reaction at the Si-H bond. The silyl radicals so produced initiate the crosslinking of the acrylate. In the presence of oxygen, pseudo first order reactions between polymer radicals and oxygen terminate the polymerization process. Added H-siloxanes enhance network formation.

引用

页码：621 / 625

页数：5

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