| HEC稳定的VAc/BA乳胶粒子增长及分布的演变机理 |
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| 引用本文： | 秦少雄,张心亚,傅和青,陈焕钦.HEC稳定的VAc/BA乳胶粒子增长及分布的演变机理[J].湖南师范大学自然科学学报,2007,30(4):73-76. |
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| 作者姓名： | 秦少雄 张心亚 傅和青 陈焕钦 |
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| 作者单位： | 1. 长江大学化学与环境工程学院,中国,荆州,434100
2. 华南理工大学化工学院化工研究所,中国,广州,510640 |
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| 基金项目： | 湖北省教育厅科研资助项目(B200712001) |
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| 摘 要： | 以羟乙基纤维素(HEC)为主要稳定剂,采用半连续种子乳液聚合法合成了聚醋酸乙烯酯/丙烯酸丁酯(VAc/BA)乳液.对乳液聚合过程中乳胶粒粒径增长进行了测定,探讨了粒径及粒径分布随时间及其与转化率之间的相互关系.根据对实验的分析提出了该聚合体系中乳胶粒子的增长机理.发现HEC在单体和引发剂作用下存在降解与接枝两种趋势,其程度决定乳胶粒子增长与分布.
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| 关 键 词： | 羟乙基纤维素 粒径及其增长 成粒机理 |
| 文章编号： | 1000-2537（2007）04-0073-04 |
| 收稿时间： | 2007-08-18 |
| 修稿时间： | 2007年8月18日 |
Evolution Mechanism of Latex Particle Size and its Distribution of VAc/BA Stabilized by HEC |
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| QIN Shao-xiong,ZHANG Xin-ya,FU He-qin,CHEN Huan-qin.Evolution Mechanism of Latex Particle Size and its Distribution of VAc/BA Stabilized by HEC[J].Journal of Natural Science of Hunan Normal University,2007,30(4):73-76. |
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| Authors: | QIN Shao-xiong ZHANG Xin-ya FU He-qin CHEN Huan-qin |
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| Institution: | 1. College of Chemistry and Environmental Engineering, Yangtze University, Jingzhou 434100, China; 2. Research Institute of Chemical Engineering, South China University of Technology, Guangzhou 510640, China |
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| Abstract: | The semi-continuous seeded emulsion copolymerization of vinyl acetate and butyl acryl ate was carried out with hydroxyethyl cellulose as a colloid stabilizer.The particle size and its distribution were measured during the emulsion polymerization.The variation of particle size and its distribution along with the reaction time and the monomer conversion were also investigated.Based on the theoretical and experimental analyses,the growth mechanism of latex particle was proposed.It is found that the hydroxyethyl cellulose would be degraded or grafted under the action of initiator and monomers,and the particle size and its distribution depends on the degree of degraded or grafted. |
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| Keywords: | hydroxyethyl cellulose particle size and particle growth particle formation mechanism |
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