丙烯酸-β-羟丙酯存在下无皂白交联型聚苯乙烯胶乳的合成与表征  

Synthesis and Characterization of Emulsifier-free Self-cross Linked Polystyrene Latex in the Presence of β-Hydroxy Propyl Acrylate

作　　者：戴李宗[1] 邹友思[1] 宋爱群 潘容华[1] 

机构地区：[1]厦门大学化学系,厦门361005

出　　处：《高等学校化学学报》1993年第9期1312-1316,共5页Chemical Journal of Chinese Universities

摘　　要：研究了丙烯酸-β-羟丙酯存在下高浓度苯乙烯的无皂乳液聚合.[St]、[β-HPA]、[KPS]分别为2.66、0.228和5.8×10^(-3)mol/L,80℃反应5h,单体转化率可达90％;经TEM分析,求出了胶乳粒径D=0.23μm,粒子浓度N=3.13×10^(13)粒/cm^3,且胶乳粒径具有单分散性;并讨论了影响乳液稳定性的因素.经IR光谱和溶解性试验证实β-HPA参与了St共聚,推测了自交联机理;求出了聚合反应表观活化能(78.7kJ/mol)和80℃时的聚合反应速率常数(514.3L/mol·s).Emulsifier-free emulsion polymerization of styrene in the presence of β-hydroxy propyl acrylate was studied. Monomer conversion is higher than 90% when [St], [β-HPA], [KPS] is 2. 66, 0. 228, and 5. 8×10-3 mol/L respectively under 80℃ for 5 h. The mono-dispersed latex particle diameter and colloidal particle concentration were given as D=0. 23 μm, N=3. 13× 1013/cm3 by TEM analyse. The factors of influencing latex stability were discussed. The copoly-mer was characterized by IR and dissolution experiment. The self-cross linked mechanism was also discussed. The apparent activation energy of polymerization and polymerization rate constant were obtained to be 78. 7 kJ/mol and 514. 3 L/mol · s respectively.

关 键 词：无皂乳液聚合 苯乙烯 自交联胶乳 

分 类 号：O632.13[理学—高分子化学]