Siloxane/silane‐crosslinked systems from supercritical carbon dioxide: II. Pendant phenyl poly(carbosilane/siloxane)s

Autor:	Hui Zhou, John W. Fitch, Patrick E. Cassidy, Sreenu R. Venumbaka
Rok vydání:	2008
Předmět:	chemistry.chemical_classification Supercritical carbon dioxide Materials science Polymers and Plastics Polymer Toluene Silane Catalysis Solvent chemistry.chemical_compound chemistry Polymerization Siloxane Polymer chemistry
Zdroj:	Polymers for Advanced Technologies. 19:734-738
ISSN:	1099-1581 1042-7147
Popis:	New silicone-containing polymers with crosslinkable units have been synthesized by hydrosilation polymerization in both toluene and supercritical carbon dioxide (70°C, 3000 psi) catalyzed by platinum-divinyltetramethyldisiloxane (Pt-DVTMS). It was found that high molecular polymers were obtained in both toluene and supercritical carbon dioxide. The polymers were characterized by FTIR, NMR, GPC, TGA, and DSC. The molecular weights of these polymers ranged from 9000 to 39,000. With further hydrolysis and thermal curing, the molecular weight can be increased significantly. Comparison of the properties between reactions in toluene versus supercritical carbon dioxide indicated that the green solvent is a usable alternative for hydrosilation polymerization. The new polymers synthesized in either toluene or supercritical carbon dioxide are thermally stable, ranged from 350 to 488°C. Copyright © 2008 John Wiley & Sons, Ltd.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::ebefb151607edc61110b54914ae06c71 https://doi.org/10.1002/pat.1048 Zobrazit plný text záznamu Plný text