Hierarchical Structures in Amphiphilic Random Copolymer Solutions(Non Equilibrium Soft Matter)

概要

論文の詳細を見る
Surveying the theory of associating polymer solutions, we have applied the theory to aqueous solution systems of two amphiphilic random copolymers to reveal the hierarchical structure in the solutions. The two random copolymers form uni-core flower micelles comprising of 2 and 8 copolymer chains in dilute solution. However, a part of hydrophobic groups are outside the micellar core and act as binding sites for higher-order aggregation of micelles progressing with increasing the copolymer concentration. The aggregates of flower micelles are bimodal: the major fast relaxation mode component with m_w (the weight average aggregation number) of the order of 10 and the minor slow relaxation mode component with m_w, of order of 10^3. The viscosity enhancement of the copolymer solutions with increasing the concentration mostly arises from the growth of the major fast mode aggregate.
2008-12-05