Silicone-modified cellulose. Crosslinking of cellulose acetate with poly[dimethyl(methyl-H)siloxane] by Pt-catalyzed dehydrogenative coupling |
| |
Authors: | George Stiubianu Carmen Racles Maria Cazacu and Bogdan C Simionescu |
| |
Affiliation: | (1) “Petru Poni” Institute of Macromolecular Chemistry, Aleea Gr. Ghica Voda 41A, 700487 Iasi, Romania;(2) “Gh. Asachi” Technical University, 700040 Iasi, Romania |
| |
Abstract: | Cellulose acetate was reacted in different ratios with polydimethyl(methyl-H)siloxane] containing 25 mol% Si–H side groups
along the chain. A dehydrocoupling reaction between Si–H and C–OH groups occurred in presence of Karstedt’s catalyst, leading
to the formation of Si–O–C bond, as proved by FTIR spectra, thus crosslinking the cellulose derivative. The networks were
processed as films by casting before the end of the reaction and were investigated by different techniques to emphasize the
morphology, thermal, dielectric and surface properties developed in correlation with the ratio between the two involved components
(cellulose and siloxane derivatives). A decrease of the dielectric constant values of cellulose acetate was noticed throughout
the studied frequency and temperature range as a result of crosslinking. |
| |
Keywords: | |
本文献已被 SpringerLink 等数据库收录! |
|