高分子链模型对两亲性二嵌段共聚物系统均匀溶液/胶束转变的影响

吉林大学学报(理学版) ›› 2021, Vol. 59 ›› Issue (4): 977-981.

高分子链模型对两亲性二嵌段共聚物系统均匀溶液/胶束转变的影响

张惠, 韩向刚

内蒙古科技大学理学院, 内蒙古包头 014010

收稿日期:2021-01-25 出版日期:2021-07-26 发布日期:2021-07-26
通讯作者: 韩向刚 E-mail:xghan0@163.com

Effect of Polymer Chain Model on Homogeneous Solution/Micelle Transition in Amphiphilic Diblock Copolymer System

ZHANG Hui, HAN Xianggang

School of Science, Inner Mongolia University of Science and Technology, Baotou 014010, Inner Mongolia Autonomous Region, China

Received:2021-01-25 Online:2021-07-26 Published:2021-07-26

摘要/Abstract

摘要： 利用格子自洽场方法, 通过计算系统相图和比热研究在两亲性二嵌段共聚物溶液体系中高分子浓度和高分子链模型对胶束形成的影响. 结果表明, 随着高分子浓度的增加, 胶束出现的温度逐渐升高. 相对于可直接折返分子链模型, 不可直接折返分子链模型增加了体积排斥效应, 有利于均匀溶液/胶束转变的出现, 但在一定程度上限制了胶束聚集程度的增加.

关键词: 两亲性嵌段共聚物, 胶束, 高分子链模型, 自洽场方法

Abstract: Using self-consistent field theory lattice model, we studied the effect of polymer concentration and polymer chain model on micelle formation in amphiphilic diblock copolymer solutions by calculating phase diagram and specific heat. The results show that the temperature of micelle formation increases gradually with the increase of polymer concentration. Compared with direct backfolding polymer chain model, the non-direct backfolding polymer chain model increases the excluded volume effect, which is favorable to unimer-micelle transition. However, the excluded volume effect limits the increase of micelle aggregation to a certain extent.

Key words: amphiphilic block copolymer, micelle, polymer chain model, self-consistent field method

中图分类号:

O411

张惠, 韩向刚. 高分子链模型对两亲性二嵌段共聚物系统均匀溶液/胶束转变的影响[J]. 吉林大学学报(理学版), 2021, 59(4): 977-981.

ZHANG Hui, HAN Xianggang. Effect of Polymer Chain Model on Homogeneous Solution/Micelle Transition in Amphiphilic Diblock Copolymer System[J]. Journal of Jilin University Science Edition, 2021, 59(4): 977-981.