环硅氧烷阳离子乳液聚合动力学及单体迁移研究

范文编号:CL110  范文字数:10106,页数:20

摘 要：本范文主要根据环硅氧烷阳离子乳液聚合的反应机理和反应特性，以十二烷基二甲基苄基溴化铵为阳离子乳化剂、KOH为催化剂、D4为单体来进行环硅氧烷阳离子乳液聚合，并在此基础上讨论环硅氧烷阳离子乳液聚合的条件影响因素以及聚合过程中单体的扩散规律。研究结果表明：搅拌速度和催化剂用量是两个主要的条件影响因素，搅拌速率越快，反应速率越大；KOH用量增加，聚合反应速率也增加，至一定程度再下降。此外，当聚合开始后，增溶胶束形成的乳胶粒聚合速率快，单体浓度低，单体液滴形成的乳胶粒聚合速率慢，单体浓度高，并随聚合的进行，由于扩散的作用，两者浓度差距变小，直至达到平衡状态，两者达到同样的浓度。

关键词：环硅氧烷；阳离子乳液聚合；动力学关系；单体扩散传递

Abstract: According to this thesis, Central siloxane cationic polymerization reaction mechanism and response characteristics, to 12 alkyl dimethyl benzyl bromide for cationic emulsifiers, KOH as the catalyst, D4 for the monomer for Central siloxane Cationic polymerization and on the basis of this discussion the Central siloxane cationic emulsion polymerization conditions and factors affecting the course of the proliferation of monomer. The results show that: Mixing speeds and the amount of catalyst are two major factors affecting the conditions, stirring rate sooner, the greater the reaction rate; KOH amount of increase in polymerization rate also increased, then decreased to a certain extent. In addition, when the start of polymerization, Sol beam formed by the latex particles polymerization rate faster monomer concentration of low, single droplet formation of the latex particles polymerization rate slow, high concentrations of monomer and polymerization with the conduct, due to the spread of the role, Concentration of smaller gap between the two, until equilibrium, the two achieve the same concentration.

Key words: Central siloxane; cationic polymerization; dynamic model; dynamics between the proliferation of single transmission

目  录
中文摘要……………………………………      I
英文摘        II
 目录       .              III
1. 绪论                    1
1.1  引言           .      1
1.2  有机硅乳液聚合的简介           1
1.3  有机硅乳液的应用          .     1
1.4  有机硅阳离子乳液聚合的研究现状      .3
 1.4.1   阳离子乳液聚合            .3
 1.4.2   阴离子乳液聚合           4
 1.4.3   与氨基单体共聚       .   .5
1.5  课题的提出及研究内容           . 5
2. 实验部分            7
2.1  试剂和仪器            7
      2.1.1  试剂              . 7
      2.1.2  仪器及玻璃器皿          . 7
 2.2  实验流程       .         8
 2.3  样品测试        .            .8
3. 结果与讨论                 . 9
3.1  乳液聚合的条件影响因素        .     9
     3.1.1   搅拌速度的影响             ..9
     3.1.2   催化剂用量的影响          . 10
3.2  单体扩散传递的研究              .10
4. 总结与展望                   13
   致谢         .             15
   参考文献                          16

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