ICCAS OpenIR
Influences of hydrolysis stability of silazane additives on thermal stability of silicone rubber
Jiang, J; Zheng, ZM; Peng, WQ; Xu, CH; Xie, ZM
2002-10-01
Source PublicationACTA POLYMERICA SINICA
ISSN1000-3304
Issue5Pages:623-627
AbstractA new method was applied to study kinetics of hydrolysis reactions of silazane compounds, which were used as additives in silicone rubbers to improve their thermal stability. It was shown that the hydrolysis reaction was a first-order reaction versus the concentration of the silazane compound. Activation energy (E-a) was calculated for reactions of several silazane compounds with water vapor. It was indicated that activation energy of hydrolysis was closely related with the structure of the silazane compound. The hydrolysis stability would increase when groups around silicon atom or nitrogen atom were of high steric hindrance. Hydrolysis activation energy of hexaphenylcyclotrisilazane 4 was 214 kJ/mol, and that of polymer 5 which contained cyclodisilazane in backbone was 291.3 kJ/mol. Thermal stability of silicone rubber could be improved more effectively when silazanes with higher E-a were used as additives. The weight loss of silicone rubber with compound 4 and 5 as additive was 0.96% and 0.6%, respectively, when aged under 350degreesC for 24 h.
KeywordSilazane Hydrolysis Stability Kinetics Equation Heat Resistance Of Silicone Rubber
Indexed BySCI
Language英语
WOS IDWOS:000178936800014
PublisherSCIENCE CHINA PRESS
Citation statistics
Cited Times:1[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.iccas.ac.cn/handle/121111/79240
Collection中国科学院化学研究所
Corresponding AuthorJiang, J
AffiliationChinese Acad Sci, Ctr Mol Sci, Inst Chem, Beijing 100080, Peoples R China
Recommended Citation
GB/T 7714
Jiang, J,Zheng, ZM,Peng, WQ,et al. Influences of hydrolysis stability of silazane additives on thermal stability of silicone rubber[J]. ACTA POLYMERICA SINICA,2002(5):623-627.
APA Jiang, J,Zheng, ZM,Peng, WQ,Xu, CH,&Xie, ZM.(2002).Influences of hydrolysis stability of silazane additives on thermal stability of silicone rubber.ACTA POLYMERICA SINICA(5),623-627.
MLA Jiang, J,et al."Influences of hydrolysis stability of silazane additives on thermal stability of silicone rubber".ACTA POLYMERICA SINICA .5(2002):623-627.
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