MORPHOLOGY STUDY OF A SERIES OF AZOBENZENE-CONTAINING SIDE-ON LIQUID CRYSTALLINE TRIBLOCK COPOLYMERS  

作　　者：Annie Brulet Pierre-antoine Albouy Patrick Keller 王晓工 

机构地区：[1]Laboratoire Leon Brillouin,UMR12 CEA-CNRS,C.E.Saclay,91191 Gif sur Yvette Cedex,France [2]Laboratoire de Physique des Solides,CNRS UMR 8502,Universite Paris-Sud,Batiment 510,91405 Orsay CEDEX,France [3]Institut Curie,Centre de Recherche,CNRS UMR168,Universite Pierre et Marie Curie,26 rue d'Ulm,75248 Paris CEDEX 05,France [4]Department of Chemical Engineering,School of Materials Science and Engineering, Tsinghua University,Beijing 100084,China

出　　处：《Chinese Journal of Polymer Science》2012年第2期258-268,共11页高分子科学（英文版）

基　　金：financially supported by the French Embassy in China(Beijing) to Wei Deng(Bourse doctorale en altemance 2004-2007)

摘　　要：A series of azobenzene containing side-on liquid crystalline ABA triblock copolymers were investigated. This triblock series possesses the same central liquid crystal block B and various lengths of the amorphous block A. Transmission electron microscopy （TEM）, small angle X-rays and neutron scattering （SAXS and SANS） were used to study their morphologies. After annealing the samples over weeks at a temperature within the nematic temperature range of block B, different morphologies （disordered, lamellar, perforated layer and hexagonal cylinder） were observed by TEM. The alignment behavior of these azo triblock copolymers in the magnetic field for artificial muscle application, as well as the phase period and the order-disorder transition （ODT） were studied in situ by SANS.A series of azobenzene containing side-on liquid crystalline ABA triblock copolymers were investigated. This triblock series possesses the same central liquid crystal block B and various lengths of the amorphous block A. Transmission electron microscopy （TEM）, small angle X-rays and neutron scattering （SAXS and SANS） were used to study their morphologies. After annealing the samples over weeks at a temperature within the nematic temperature range of block B, different morphologies （disordered, lamellar, perforated layer and hexagonal cylinder） were observed by TEM. The alignment behavior of these azo triblock copolymers in the magnetic field for artificial muscle application, as well as the phase period and the order-disorder transition （ODT） were studied in situ by SANS.

关 键 词：Side-on liquid crystal Triblock copolymer Phase separation SANS. 

分 类 号：O631.3[理学—高分子化学]