两性三嵌段共聚物溶液共混体系的相行为  

The Phase Behavior for Amphiphilic Triblock Copolymer Blend

作　　者：张彦泽 乔婷 韩向刚[1] 王石 

机构地区：[1]内蒙古科技大学理学院,内蒙古包头014010

出　　处：《首都师范大学学报（自然科学版）》2017年第6期26-29,共4页Journal of Capital Normal University：Natural Science Edition

基　　金：国家自然科学基金(21564011)

摘　　要：利用格子自洽场方法,研究在选择性溶液体系中两亲性对称三嵌段共聚物混合比例对聚集性质的影响,并在不同浓度下构建了作用参数与混合比例的相图.计算结果表明:在聚合物浓度较低时,胶束出现的最小作用参数出现在ABA(A为疏水嵌段,B为亲水嵌段)两亲性嵌段共聚物混合比例较大时;在聚合物浓度较高时,胶束出现的最小作用参数出现在BAB两亲性嵌段共聚物混合比例较大时,上述结果说明分子链结构对两亲性嵌段共聚物聚集性质产生显著影响,并且这种影响与浓度有关.Using lattice self-consistent field theory,the effect of the proportion of blend on aggregation properties for symmetrical amphiphilic triblock copolymer in selective solution system is studied through calculating phase diagram given a fixed concentration. The results show that,at low concentration,the minimum of Flory-Huggins interaction parameter for the micelle appearance occurs when the blend proportion of ABA（ A is hydrophobic block,B is hydrophilic block） triblock copolymer is large; at high concentration,the corresponding value of interaction parameter occurs when the blend proportion of BAB triblock copolymer is large. The above results demonstrate the effect of the chain architecture on the aggregation is notable in amphiphilic triblock copolymer and related to the copolymer concentration.

关 键 词：两亲性嵌段共聚物 胶束 自洽场理论 

分 类 号：O411[理学—理论物理]