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On the interaction of the morphological structure and the LC behaviour of LC side group block copolymers
Author(s) -
Fischer Hartmut,
Arnold Manfred
Publication year - 1996
Publication title -
macromolecular symposia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.257
H-Index - 76
eISSN - 1521-3900
pISSN - 1022-1360
DOI - 10.1002/masy.19961020135
Subject(s) - copolymer , phase (matter) , materials science , liquid crystal , polymer , block (permutation group theory) , side chain , crystallography , diffraction , polymer chemistry , chemistry , optics , organic chemistry , composite material , physics , geometry , mathematics , optoelectronics
The interaction between morphological structure and phase behaviour of a group of LC side group block copolymers have been investigated using DSC, TEM and small angle X‐ray diffraction. Generally, phase separation between the two blocks was observed. It was found that in the case of those samples, where the liquid crystalline sub‐phase is not continuous (spheres), only a nematic phase is seen, whereas in all samples in which there is a continuous liquid crystalline sub‐phase, the smectic A phase of the homopolymer is formed. On the other hand, the block copolymer seems to stabilise the LC‐phase and the polymer properties in general, no dependency of the clearing temperatures and of the glass transition temperatures from the molecular weight of the LC blocks has been detected.