摘要
测量了１０ ，１２二炔廿五碳酸单分子膜在不同亚相ｐＨ 下的πＡ曲线，记录了其紫外聚合过程中的面积变化过程．实验表明，亚相酸度的改变导致成膜分子间相互作用的变化，从而引起１０，１２二炔廿五碳酸单分子膜中的相转变，酸度越大，１０ ，１２二炔廿五碳酸单分子膜的可压缩性越大，聚合的反应性也越大．文中还讨论了膜压对反应速率的影响，并指出了双炔酸本体聚合与在单分子膜状态下聚合反应的区别．
Isotherms of 10,12 pentacosadiynoic acid (PDA) monolayers were measured and their UV irradiation polymerization were carried out on the subphases of 4×10 -4 CdCl 2 with varying pH values. It was found that changing the subphase pH can cause phase transition of the PDA monolayer and that the compressibility and reactivity of the monolayer increase with the acidity of the subphase. The surface pressure dependence of reaction rate was investigated. Difference in the polymerization between PDA monolayer and PDA bulk crystal was indicated.
基金
国家自然科学基金资助
关键词
二炔廿五碳酸
单分子膜
聚合
LB膜
PH值
pentacosadiynoic acid, monolayer polymerization, Langmuir Blodgett technique, pH
