私密直播全婐app免费大渔直播,国产av成人无码免费视频,男女同房做爰全过程高潮,国产精品自产拍在线观看

當前位置:群英聚首 > 論文著作 > 正文
Facile synthesis of silica-polymer hybrids via simultaneous RAFT process and hydroxyl-alkoxysilane coupling reaction
來源:趙優良教授個人網站 發布日期:2012-01-29
作者:Chunnuan Ye, Weina Qi, Xinhua Yu, Peipei Zhang, Tengteng Hou, Youliang Zhao*
關鍵字:RAFT polymerization, coupling reaction, silica particles, surface modification, hybrid material
論文來源:期刊
具體來源:Frontiers of Chemistry in China, 2011, 6, 213-220
發表時間:2011年

This study aimed at synthesis of silica particles grafted with better-defined homopolymers and block copolymers by tandem approach. Z-functionalized S-benzyl S’- (3-trimethoxysilyl)propyltrithiocarbonate (BTPT) was used as a couplable RAFT agent to synthesize the target inorganic-organic hybrids. Simultaneous coupling reaction and RAFT process using silica particles and BTPT as raw materials efficiently afforded homopolymers grafted silica, and RAFT-synthesized macro chain transfer agents with ω-terminal trimethoxysilane moiety were utilized to mediate graft reaction to prepare silica particles grafted with di-, tri- and tetrablock copolymers comprised of polymer segments such as polystyrene, polyacrylamides and polyacrylates. When the grafted chains had molecular weights ranging between 3920 and 24800, the molar grafting ratios depended on reaction conditions and types and compositions of grafted chains were estimated to be in the range of 15.2-101 μmol/g, and grafted polymers usually had polydispersity indices lower than 1.3, revealing the grafting process was almost controllable. To the best of our knowledge, this versatile tandem approach is one of most facile techniques to prepare silica particles grafted with polymeric chains with controlled molecular weight, low polydispersity and precise composition due to its minimal reaction steps, mild conditions, straightforward synthesis and satisfactory controllability.

Copyright © 2005 Polymer.cn All rights reserved
中國聚合物網 版權所有
經營性網站備案信息

京公網安備11010502032929號

工商備案公示信息

京ICP證050801號

京ICP備12003651號

主站蜘蛛池模板: 隆子县| 榆林市| 玛曲县| 武宣县| 黄大仙区| 徐水县| 白城市| 栖霞市| 招远市| 金川县| 锡林浩特市| 余庆县| 临洮县| 云和县| 昂仁县| 马关县| 澄江县| 鲁甸县| 白沙| 宝坻区| 丰台区| 时尚| 霍城县| 溧阳市| 洪洞县| 晋城| 平罗县| 隆子县| 兰考县| 桦甸市| 扎赉特旗| 遂宁市| 浠水县| 桐城市| 枣强县| 昂仁县| 阿拉善盟| 凉山| 星座| 花垣县| 新沂市|