Ordering at two length scales in comb-coil diblock copolymers consisting of only two different monomers

Details Ordering at two length scales in comb-coil diblock copolymers consisting of only two different monomers Ordering at two length scales in comb-coil diblock copolymers consisting of only two different monomers

2001-03-26

arxiv.org/abs/cond-mat/0103531v1

Physics

Condensed Matter

Soft Condensed Matter

22 pages, 12 Postscript figures (revtex)

Scientific paper

10.1021/ma010519v

The microphase separated morphology of a melt of a specific class of comb-coil diblock copolymers, consisting of an AB comb block and a linear homopolymer A block, is analyzed in the weak segregation limit. On increasing the length of the homopolymer A block, the systems go through a characteristic series of structural transitions. Starting from the pure comb copolymer the first series of structures involve the short length scale followed by structures involving the large length scale. A maximum of two critical points exists. Furthermore, in the two parameter space, characterizing the comb-coil diblock copolymer molecules considered, a non-trivial bifurcation point exists beyond which the structure factor can have two maxima (two correlation hole peaks).

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