SYNTHESIS OF HYBRID LIQUID-CRYSTALLINE BLOCK-COPOLYMERS BY COMBINATION OF CATIONIC OR PROMOTED CATIONIC AND FREE-RADICAL POLYMERIZATIONS


SERHATLI I., GALLI G., YAGCI Y., CHIELLINI E.

POLYMER BULLETIN, vol.34, pp.539-546, 1995 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 34
  • Publication Date: 1995
  • Doi Number: 10.1007/bf00423349
  • Journal Name: POLYMER BULLETIN
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.539-546
  • Istanbul Technical University Affiliated: No

Abstract

The synthesis of two new classes of liquid crystalline block copolymers (1-5) by a two-step combination of cationic and free-radical polymerizations is described. An azomacroinitiator was prepared first by cationic polymerization of tetrahydrofuran or promoted cationic polymerization of cyclohexene oxide, which was then used to initiate the free-radical polymerization of an acrylate monomer containing a variously substituted biphenyl mesogenic group. The semicrystalline and liquid crystalline blocks were essentially microphase-separated and gave rise to different thermotropic mesophases.