棒-棒二嵌段共聚物自组装行为的自洽场研究  

Study on Self-assemble of Rod-rod Diblock Copolymers with Self-consistent Field Lattice Model

作　　者：韩向刚[1] 张程祥[1] 

机构地区：[1]吉林大学物理学院,长春130023

出　　处：《高等学校化学学报》2010年第3期566-570,共5页Chemical Journal of Chinese Universities

摘　　要：利用格子自洽场模型,模拟了棒-棒二嵌段共聚物熔体系统的自组装行为,并与线-棒二嵌段共聚物系统性质进行了对比.结果表明,棒-棒二嵌段共聚物系统的有序无序转变临界点低于线-棒二嵌段共聚物系统的相变临界点.通过模拟计算,发现薄层交叠柱状相、柱状相、层状相和Z形层状相4种稳定的有序形貌.薄层交叠柱状相和柱状相仅在有序无序转变曲线的边缘位置出现,层状相也仅存在于有序无序转变临界点上面的一小块区域内,而稳定的Z形层状结构则占据了相图中较强相互作用的大部分区域.The self-assemble behavior of the rod-rod diblock copolymers was studied by means of self-consistent field lattice model,and the results were compared with the coil-rod diblock copolymers.It is shown that the order-disorder transition point of rod-rod diblock copolymers is lower than that of coil-rod diblock copolymers.Four stable structures are obtained,i.e.,overlapping cylinders,cylinders,lamellae and zigzag lamellae.The overlapping cylinders and cylinders occur only in the region near the order-disorder transition curve.Lamellae are observed in the region above the order-disorder transition point.However,the stable zigzag lamella structure occupies a big region corresponding to the strong interaction between two different components of diblock copolymers.

关 键 词：高分子熔体 二嵌段共聚物 自组装 

分 类 号：O641[理学—物理化学] O631.1[理学—化学]