摘要
研究了在双十六烷基二甲基溴化铵（ＤＣＤＡＢ）形成的微泡溶液中，二苯酮（ＢＰ）／三乙胺（ＴＥＡ）体系的光化学初级反应和引发ＭＭＡ光聚合反应．动力学实验结果表明，ＤＣＤＡＢ微泡对聚合反应有显著的催化作用，使聚合速度提高近４倍左右，其效果和离子型胶束的催化作用结果相近．由ＤＣＤＡＢ微泡中光聚合得到的产物ＰＭＭＡ，具有较高的结构规整性，它的间同和全同结构可达７０％左右．
hotochemical primary reaction and photoinitiated polymerization of MMA with Benzophenone(BP)/Triethylamine(TEA) in dicetyldimethyl ammonium bromide(DCDAB) vesicle solution were studied in this paper. The kinetic experimental results showed that DCDAB vesicles exhibit a large catalysis on the polymerization, leading to an increase in the polymerization rate by four times which is near to the values catalyzed by the ionic micelles. Except the effect of the conventional high local concentration produced by the solubilization this result also should be attributed to the microenviroment effect of interface layer at DCDAB vesicles,where the reaction takes place. It promotes significantly the photochemical primary reaction of BP/TEA and results in increase in the rates of electron transfer (Kir)and proton transfer(Kh) processes. The polymerization product(PMMA) formed in DCDAB vesicles has a lelatively high tacticity and was estimated to be about 70% syndic-and isotactic.
出处
《高分子学报》
SCIE
CAS
CSCD
北大核心
1995年第4期398-403,共6页
Acta Polymerica Sinica
基金
国家自然科学基金
