Gong Hongshen
2013
Citations
0
Influential Citations
1
Citations
Journal
CIESC Journal
Abstract
The systhesis of 1,1,1,3,5,5,5-heptamethyltrisiloxane(MDHM)from hexamethydi-siloxane(MM)and highly hydrogen-containing polyhydrosiloxane(DH)was optimized after applying response surface methodology(RSM)in the presence of strong acidic cation ion exchange resin as catalyst.Based on the single-factor testing results,RSM measurements were performed with respect to mass concentration of MDHM by regression analysis.The optimal conditions at which the highest yield of MDHM(40.62%)was obtained,were in agreement with predicted value(41.23%).The reaction mass ratio of m(DH)∶m(MM)=1∶13.45,the amount of solid acid catalyst was 7.09%,and reaction temperature and time were 62.5℃and 10h,respectively.Furthermore,the research on polymerization kinetics at different temperatures was performed and the results showed that the optimal temperature and time were right.