| 超临界二氧化碳中一种高分子弱凝胶的制备及性质 |
| |
| 引用本文： | 张怀平,许凯,陈德宏,许林利,陈嘉,陈鸣才.超临界二氧化碳中一种高分子弱凝胶的制备及性质[J].高分子材料科学与工程,2009(5). |
| |
| 作者姓名： | 张怀平 许凯 陈德宏 许林利 陈嘉 陈鸣才 |
| |
| 作者单位： | 中国科学院广州化学研究所;太原理工大学材料科学与工程学院;中国科学院研究生院; |
| |
| 基金项目： | 国家自然科学基金资助项目(20474067) |
| |
| 摘 要： | 通过改变丙烯酸(AA)与可反应疏水单体甲基丙烯酸-3-三甲氧基硅丙酯(MPS)的投料比,在超临界二氧化碳介质中制备了一系列的AA与MPS共聚物(AA-co-MPS)。采用滴定法、扫描电镜和旋转黏度计对共聚物的组成及性质进行了表征。结果表明,MPS反应活性较丙烯酸高,共聚物形貌是直径约0.5μm左右的球形颗粒。共聚物的溶解试验结果表明,硅氧烷间化学反应形成弱凝胶体系,分子间交联使弱凝胶的黏度随着可反应疏水单体含量增加而增加。共聚物中可反应疏水单体质量百分比含量超过2.1%时,共聚物开始形成沉淀。由于共聚物具有pH敏感性,弱凝胶体系黏度随pH值变化先增加后减少,在pH=5.5出现峰值。
|
| 关 键 词： | 超临界二氧化碳 弱凝胶 表观黏度 pH敏感性 |
Synthesis of a Novel Weak Gel in Supercritical Carbon Dioxide and Its Properties |
| |
| ZHANG Huai-ping,,XU Kai,CHEN De-hong,XU Lin-li,CHEN Jia,CHEN Ming-cai.Synthesis of a Novel Weak Gel in Supercritical Carbon Dioxide and Its Properties[J].Polymer Materials Science & Engineering,2009(5). |
| |
| Authors: | ZHANG Huai-ping XU Kai CHEN De-hong XU Lin-li CHEN Jia CHEN Ming-cai |
| |
| Affiliation: | 1.Guangzhou Institute of Chemistry;Chinese Academy of Sciences;Guangzhou 510650;China;2.College of Materials Science and Engineering;Taiyuan University of Technology;Taiyuan 030024;3.Graduate School of Chinese Academy of Sciences;Beijing 100039;China |
| |
| Abstract: | Copolymer poly(AA-co-MPS) were synthesized using precipitation polymerization of acrylic acid and methacryloxypropyltrimethoxysilane(MPS) in various molar ratios in supercritical carbon dioxide.The structure and properties of the copolymer were studied by scanning electron microscopy(SEM),titration,rotational viscometer.The MPS monomer is more active than the AA monomer in reaction.Copolymer morphologies and particle size were determined by SEM.It shows that the diameter of the primary particle is around 0.... |
| |
| Keywords: | supercritical carbon dioxide weak gel apparent viscosity pH responsive |
| 本文献已被 CNKI 等数据库收录！ |
|
