

FOLLOWUS
a.State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China
b.University of Chinese Academy of Sciences, Beijing 100049, China
c.School of Polymer Science and Engineering, Qingdao University of Science and Technology, Qingdao 266042, China
Yu-yuan Lu (卢宇源), E-mail:yylu@ciac.ac.cn
Received:12 November 2016,
Revised:2016-12-9,
Accepted:15 December 2016,
Published:05 July 2017
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Jian Wang, Jian-hui Song, Yu-yuan Lu, et al. Phase Behavior and Interfacial Properties of Diblock CopolymerHomopolymer Ternary Mixtures: Influence of Volume Fraction of Copolymers and Interaction Energy[J]. Chinese Journal of Polymer Science, 2017, 35(7): 874-886.
Jian Wang, Jian-hui Song, Yu-yuan Lu, et al. Phase Behavior and Interfacial Properties of Diblock CopolymerHomopolymer Ternary Mixtures: Influence of Volume Fraction of Copolymers and Interaction Energy[J]. Chinese Journal of Polymer Science, 2017, 35(7): 874-886. DOI: 10.1007/s10118-017-1915-8.
We use a Monte Carlo method to study the phase and interfacial behaviors of A-
b
-B diblocks in a blend of homopolymers
A and B
which are confined between two asymmetric hard and impenetrable walls. Our results show that
when the interaction strength is weak
the block copolymers are uniformly distributed in the ternary mixtures under considered concentrations. Under strong interaction strength
distribution region of the block copolymers changes from a single smooth interface to a curved interface or multi-layer interface in the ternary mixtures. Furthermore
our findings show that with increasing volume fraction of A-
b
-B diblock copolymer (
ϕ
C
)
copolymer profiles broaden while
ϕ
C
≥ 0.4
a lamellar phase is formed and by further increasing
ϕ
C
more thinner layers are observed. Moreover
the results show that
with the increase of
ϕ
C
the phase interface first gradually transforms from plane to a curved surface rather than micelle or lamellar phase while with the increase of the interaction between A and B segments (
ε
AB
)
the copolymer chains not only get stretched in the direction perpendicular to the interface
but also are oriented. The simulations also reveal that the difference between symmetric and asymmetric copolymers is negligible in statistics if the lengths of two blocks are comparable.
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