棒/线两嵌段共聚物共混体系的自组装  

Self-assembly of the Blends of Rod/Coil Diblock Copolymers

作　　者：韩向刚[1] 王鹏飞[1] 

机构地区：[1]内蒙古科技大学数理与生物工程学院,内蒙古包头014010

出　　处：《吉林大学学报（理学版）》2014年第6期1297-1300,共4页Journal of Jilin University:Science Edition

基　　金：国家自然科学基金(批准号:11147132);内蒙古自治区自然科学基金(批准号:2012MS0112)

摘　　要：运用二维格子自洽场方法,研究棒/线两嵌段共聚物共混体系的自组装.结果表明:在长/短两种嵌段体积比相等的棒/线两嵌段共聚物共混体系中,当某种共聚物的混合比较大时,观察到层状结构,层的厚度与混合比大的嵌段共聚物长度有关;在两种嵌段共聚物混合比相差较小的条件下,出现了新的自组装结构,即柱层和层与柱共存相,这两种结构未出现在棒/线内嵌段共聚物熔体体系中,它们的出现与棒/线两嵌段共聚物链构象的不对称性及共混的影响有关.Based on the self-consistent field theory of lattice model in two dimension space,the self-assembly of the blends of diblock copolymers was studied.For the blends of long/small two diblock copolymers in which volume fraction of rod block equal that of coil block,when blend fraction of the two diblocks was not comparable,lamellae were observed,and their thickness was related with the length of the big blend fraction of the two diblock copolymers;on the other hand,as blend fraction of the two diblocks is comparable,the new ordered structures,including lamellar strips and coexisted lamellae and strips,were observed.These new ordered structures did not appear in the rod/coil diblock copolymer melts.The results are related to the asymmetry of the chain conformation and the blend of rod/coil diblock copolymer.

关 键 词：棒/线两嵌段共聚物 共混体系 自组装 自洽场方法 

分 类 号：O411[理学—理论物理]