環硅氧烷陽離子乳液聚合動力學及單體遷移研究

材料科學論文編號:CL110  論文字數:10106,頁數:20

目  錄
中文摘要……………………………………      I
英文摘        II
 目錄       .              III
1. 緒論                    1
1.1  引言           .      1
1.2  有機硅乳液聚合的簡介           1
1.3  有機硅乳液的應用          .     1
1.4  有機硅陽離子乳液聚合的研究現狀      .3
 1.4.1   陽離子乳液聚合            .3
 1.4.2   陰離子乳液聚合           4
 1.4.3   與氨基單體共聚       .   .5
1.5  課題的提出及研究內容           . 5
2. 實驗部分            7
2.1  試劑和儀器            7
      2.1.1  試劑              . 7
      2.1.2  儀器及玻璃器皿          . 7
 2.2  實驗流程       .         8
 2.3  樣品測試        .            .8
3. 結果與討論                 . 9
3.1  乳液聚合的條件影響因素        .     9
     3.1.1   攪拌速度的影響             ..9
     3.1.2   催化劑用量的影響          . 10
3.2  單體擴散傳遞的研究              .10
4. 總結與展望                   13
   致謝         .             15
   參考文獻                          16

摘 要：本論文主要根據環硅氧烷陽離子乳液聚合的反應機理和反應特性，以十二烷基二甲基芐基溴化銨為陽離子乳化劑、KOH為催化劑、D4為單體來進行環硅氧烷陽離子乳液聚合，并在此基礎上討論環硅氧烷陽離子乳液聚合的條件影響因素以及聚合過程中單體的擴散規律。研究結果表明：攪拌速度和催化劑用量是兩個主要的條件影響因素，攪拌速率越快，反應速率越大；KOH用量增加，聚合反應速率也增加，至一定程度再下降。此外，當聚合開始后，增溶膠束形成的乳膠粒聚合速率快，單體濃度低，單體液滴形成的乳膠粒聚合速率慢，單體濃度高，并隨聚合的進行，由于擴散的作用，兩者濃度差距變小，直至達到平衡狀態，兩者達到同樣的濃度。

關鍵詞：環硅氧烷；陽離子乳液聚合；動力學關系；單體擴散傳遞

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