Significantly Improved Stereocomplexation Ability in Cyclic Block Copolymers  

作　　者：Qian Zhu Zhi-Ping Zhou Tong-Fan Hao Yi-Jing Nie 

机构地区：[1]Research School of Polymeric Materials,School of Materials Science and Engineering,Jiangsu University,Zhenjiang 212013,China

出　　处：《Chinese Journal of Polymer Science》2023年第3期432-441,I0009,共11页高分子科学（英文版）

基　　金：financially supported by the National Natural Science Foundation of China(Nos.52173020 and 21404050);the simulation work is also supported by the Open Research Fund of CNMGE Platform&NSCC-TJ(No.CNMGE202101013);Hao also thanks the supports from the Natural Science Foundation of Jiangsu Province(No.BK20190866)。

摘　　要：Stereocomplex crystallization in cyclic polymer blend and cyclic block copolymers was investigated by means of dynamic Monte Carlo simulations.Five polymer systems(linear polymer blend,linear diblock copolymer,cyclic polymer blend,cyclic diblock copolymer and tetrablock copolymer)were established.It was interestingly found that the cyclic polymer blend exhibited the weakest stereocomplexation ability,while the two cyclic block copolymers showed stronger stereocomplexation ability than the linear diblock copolymer.This abnormal improved stereocomplexation ability of the cyclic block copolymers can be attributed to the synergy between the ring chain topology and the block copolymer structure.Compared with the linear block copolymers,the ring chain topology confined segmental motions of cyclic polymer chains to smaller regions,and then the segments belonging to the different blocks in the cyclic block copolymers have more chance to contact with each other.In this way,the cyclic block copolymers had better miscibility between segments belonging to different types of blocks,leading to the stronger stereocomplexation ability.

关 键 词：Monte Carlo simulation Stereocomplex crystallization Ring chain topology Cyclic block copolymers 

分 类 号：O631.12[理学—高分子化学]