The influence of molecule flexibility and shape on the morphology of miktoarm block copolymers in two dimensionsH. J. Qian, L. J. Chen, Z. Y. Lu, Z. S. Li and C. C. Sun
State Key Laboratory of Theoretical and Computational Chemistry Institute of Theoretical Chemistry, Jilin University - Changchun 130023, PRC
received 14 December 2005; accepted in final form 1 March 2006
published online 22 March 2006
The microphase separation of miktoarm block copolymers with different compositions and chain rigidities is studied using dissipative particle dynamics in two dimensions. The pure coil, rod-coil, and pure-rod models are considered, and complex micelles, tubular micelles, lamellae and networks morphologies are obtained for these systems. The influence of the molecule flexibility and shape on the morphology is emphasized for the special "Y"- and "T"-shaped miktoarm block copolymers. From an application point of view, these results will be helpful for designing new templates of block copolymers in thin films for the fabrication of nanostructures.
64.75.+g - Solubility, segregation, and mixing; phase separation.
61.25.Hq - Macromolecular and polymer solutions; polymer melts; swelling.
61.41.+e - Polymers, elastomers, and plastics.
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