標題: | Glass transition temperatures of poly(hydroxystyrene-co-vinylpyrrolidone-co-isobutylstyry1 polyhedral oligosilsesquioxanes) |
作者: | Xu, HY Kuo, SW Lee, JS Chang, FC 應用化學系 Department of Applied Chemistry |
關鍵字: | hybrid materials;hydrogen bonding;nanocomposites |
公開日期: | 1-九月-2002 |
摘要: | A series of poly(hydroxystyrene-co-vinylpyffolidone-co-isobutylstyryl polyhedral oligosilsesquioxanes) (PHS-PVP-POSS) hybrid polymers with various POSS contents was prepared by free radical copolymerization of acetoxystyrene, vinylpyrrolidone with styrylisobutylpolyhedral oligosilsesquioxanes (POSS), followed by selective removal of the acetyl protective group. The POSS content of a hybrid polymer can be effectively controlled by varying the feed ratios of reactants. The T-g of the POSS hybrid increases with the POSS content of PHS-PVP-POSS hybrids. The mechanism of T-g enhancement in these PHS-PVP-POSS hybrids was investigated using DSC, FTIR and GPC. The formation of the physically cross-linked POSS in these hybrid polymers trends to restrict polymer chain motion and results in significant T-g increase. (C) 2002 Published by Elsevier Science Ltd. |
URI: | http://dx.doi.org/10.1016/S0032-3861(02)00402-0 http://hdl.handle.net/11536/28533 |
ISSN: | 0032-3861 |
DOI: | 10.1016/S0032-3861(02)00402-0 |
期刊: | POLYMER |
Volume: | 43 |
Issue: | 19 |
起始頁: | 5117 |
結束頁: | 5124 |
顯示於類別: | 期刊論文 |