New poly(silanes-siloxanes) via hydrosilation in supercritical CO2 and subsequent crosslinking |
| |
| Authors: | Hui Zhou Sreenu R. Venumbaka John W. Fitch III Patrick E. Cassidy |
| |
| Affiliation: | Shell Center for Polymer Science and Technology. Department of Chemistry and Biochemistry Southwest Texas State University, San Marcos, TX 78666, USA |
| |
| Abstract: | In order to obtain crosslinkable, low dielectric, low Tg materials, the hydrosilation polymerization was carried out in supercritical carbon dioxide (SC CO2) using Karstedt's catalyst, and a series of new fluorine-containing poly(carbosilane/siloxane) were synthesized and characterized. The molecular weights of polymers obtained in SC CO2 were notably greater than those obtained in benzene. Hydrolysis and thermal curing of these polymers leads to materials considerably higher molecular weight which retain their low Tg values. |
| |
| Keywords: | |
|
|
