Bhanu Nandan, Chia-Hua Lee, Hsin‐Lung Chen
Nov 1, 2005
Citations
0
Influential Citations
38
Citations
Journal
Macromolecules
Abstract
The microphase separation in a supramolecular comb−coil block copolymer formed by the stoichiometric complexation of an amphiphilic surfactant, dodecylbenzenesulfonic acid (DBSA), with the poly(2-vinylpyridine) (P2VP) blocks in a nonlinear heteroarm (PS)5(P2VP)5 star copolymer has been investigated. The hierarchical structure in the ordered state and the relevant order−disorder transitions (ODT) of the complex have been revealed using small-angle X-ray scattering (SAXS). The results were compared with those obtained previously for linear PS-b-P2VP(DBSA) and block-arm (PS-b-P2VP)5(PS)5(DBSA) complexes [Macromolecules 2005, 38, 10117] to illustrate the effect of block copolymer architecture on the self-assembly behavior of the supramolecular comb−coil complexes. The heteroarm (PS)5(P2VP)5(DBSA) complex exhibited structure-within-structure morphology in which the larger-scale PS cylindrical microdomains were embedded in the matrix consisting of the smaller-scale lamellar mesophase organized by the P2VP(DBSA)...