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, cilt.34, ss.539-546, 1995 (SCI İndekslerine Giren Dergi) identifier identifier

  • Cilt numarası: 34
  • Basım Tarihi: 1995
  • Doi Numarası: 10.1007/bf00423349
  • Dergi Adı: POLYMER BULLETIN
  • Sayfa Sayıları: ss.539-546

Özet

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.