A comparison of Y-, H-, and pi-shaped diblock copolymers via dissipative particle dynamics

作者：Huang Ching I^*; Yang Li Fan; Lin Chih Hao; Yu Hsu Tung

来源：Macromolecular Theory and Simulations, 2008, 17(4-5): 198-207.

DOI：10.1002/mats.200700068

• block copolymers
• dissipative particle dynamics
• molecular architecture

The phase behaviors, molecular conformations, and structural length scales of Y- (AB(2)) H- (B(2)AB(2) and pi-shaped [B(A)B(A)B] copolymers are compared using dissipative particle dynamics. Though their phase diagrams are similar, the stability of microstructures is enhanced with increasing complexity of molecular sarchitecture (linear -> Y -> H or pi). In addition, the greater entropy loss associated with the disorder-to-order transition for H and pi architectures makes it more difficult for them to undergo a microphase separation. When the H and pi molecules pack to form an ordered structure, due to the significant presence of the chains in a bridge conformation, the structural length scales are strongly restricted.

• 出版日期2008-7-24