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Stress relaxation studies of model silicone RTV networks
Author(s) -
Stein Judith,
Prutzman Lori C.
Publication year - 1988
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.1988.070360305
Subject(s) - stress relaxation , vulcanization , activation energy , relaxation (psychology) , silicone , elastomer , siloxane , materials science , silicone elastomers , stress (linguistics) , polymer chemistry , composite material , catalysis , polymer science , chemistry , organic chemistry , polymer , creep , natural rubber , psychology , social psychology , linguistics , philosophy
The stress relaxation behavior of model silicone room temperature vulcanizing (RTV) elastomers has been used to examine the chemistry of the cured silicone network. It has been shown that the tin crosslinking catalyst, together with water, produces siloxane bond rearrangement which results in chemical stress relaxation. The measurement of the rate of stress relaxation of unfilled model elastomers at various temperatures gave an apparent activation energy of 10.3 kcal/mole −1 for the relaxation process. In addition, the effects of some of the constituents of the RTV on relaxation behavior have been examined.