Cylindrical-confinement-induced phase behaviours of diblock copolymer melts

doi:10.1088/1674-1056/19/2/028101

Abstract The phase behaviours of diblock copolymers under cylindrical confinement are studied in two-dimensional space by using the self-consistent field theory. Several phase parameters are adjusted to investigate the cylindrical-confinement-induced phase behaviours of diblock copolymers. A series of lamella-cylinder mixture phases, such as the mixture of broken-lamellae and cylinders and the mixture of square-lamellae and cylinders, are observed by varying the phase parameters, in which the behaviours of these mixture phases are discussed in the corresponding phase diagrams. Furthermore, the free energies of these mixture phases are investigated to illustrate their evolution processes. Our results are compared with the available observations from the experiments and simulations respectively, and they are in good agreement and provide an insight into the phase behaviours under cylindrical confinement.

Keywords: cylindrical confinement phase behaviour diblock copolymer self-consistent field theory

Received: 17 June 2009
Revised: 27 July 2009
Accepted manuscript online:

PACS:	82.35.Jk	(Copolymers, phase transitions, structure)
	61.41.+e	(Polymers, elastomers, and plastics)
	81.30.Dz	(Phase diagrams of other materials)

Fund: Project supported by the National Natural Science Foundation of China (Grant Nos. 20574052 and 20774066), the Program for New Century Excellent Talents in University, China (Grant No. NCET-05-0538) and the Natural Science Foundation of Zhejiang Province, China (Grant Nos. R404047, Y4090174, and Y405553).

Cite this article:

Liu Mei-Jiao(刘美娇), Li Shi-Ben(李士本), Zhang Lin-Xi(章林溪), and Wang Xiang-Hong(王向红) Cylindrical-confinement-induced phase behaviours of diblock copolymer melts 2010 Chin. Phys. B 19 028101

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Cylindrical-confinement-induced phase behaviours of diblock copolymer melts

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