THE ORDER-ORDER TRANSITIONS (OOT) OF C→G→L→S UNDERGOING DIFFERENT G PLANE IN ABC TRIBLOCK COPOLYMER FILM INDUCED BY SATURATED SOLVENT VAPOR
Among those typical microdomain structures of block copolymers, gyroid (G) structure has attracted a great deal of interest because of its complex but highly symmetric structure (space group 1a3d) 1. The problem of the order-order transitions (OOTs) and the order-disorder transitions (ODTs) between the G structure and the other microdomain structures of block copolymers are still open. Herein, the morphology transition of the thin film of poly (styrene)-b-poly (butadiene)-b-poly(2-vinylpyridine) (SBV) triblock terpolymers with the coexisting bulk phase structures of core-shell-cylinder and metastable alternating lamella-cylinder pattern induced in the benzene vapor with slightly selectivity for PS at room temperature is investigated in detail. It could be seen that the ascast SBV triblock copolymer film showed a disordered wormlike pattern (Figure la) due to the fast solvent evaporation, leaving the chains having no enough time to rearrange to attain equilibrium morphology during the spin coating.
Chunxia Luo Weihuan Huang Yanchun Han
State Key Laboratory of Polymer Physics and Chemistry,Changchun Institute of Applied Chemistry,Chinese Academy of Sciences,Changchun 130022,China
国际会议
International Symposium on Polymer Physics(2008年国际高分子物理学术会议PP2008)
厦门
英文
278-279
2008-06-08（万方平台首次上网日期，不代表论文的发表时间）