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Photocrosslinking of chlorinated polydimethylsiloxanes
Author(s) -
Inoue Hiroshi,
Kohama Shigemi
Publication year - 1986
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.1986.070320305
Subject(s) - radical , irradiation , photodissociation , chlorine , materials science , ultraviolet , photochemistry , polymer chemistry , halogen , infrared spectroscopy , mercury (programming language) , infrared , reaction mechanism , mercury vapor lamp , chemistry , chemical engineering , organic chemistry , physics , alkyl , optoelectronics , computer science , nuclear physics , optics , programming language , catalysis , engineering
Photocrosslinking behavior of chlorinated polydimethylsiloxanes (C‐PDMS) has been studied. It was found that the viscous C‐PDMS were readily crosslinking to form the rubberlike materials on irradiation from a high pressure mercury lamp. The crosslinking mechanism was proposed on the basis of infrared spectroscopy. It was suggested that the photolysis of the carbon—chlorine bond induced by the ultraviolet irradiation is a primary step for crosslinking, and is followed by mutual combination of SiCH 2· radicals, eventually, to form the crosslinked C‐PDMS. The effect of halogens and atmosphere on the crosslinking was also discussed.