SYNTHETIC ROUTES TO BLOCK COPOLYMERIZATION BY CHANGING MECHANISM FROM CATIONIC POLYMERIZATION TO FREE-RADICAL POLYMERIZATION


YAGCI Y. , HIZAL G. , ONEN A., SERHATLI I.

MACROMOLECULAR SYMPOSIA, vol.84, pp.127-136, 1994 (Journal Indexed in SCI) identifier

  • Publication Type: Article / Article
  • Volume: 84
  • Publication Date: 1994
  • Title of Journal : MACROMOLECULAR SYMPOSIA
  • Page Numbers: pp.127-136

Abstract

Polymers containing thermolabile groups were synthesized by various cationic polymerization initiation mechanisms, namely; oxo-carbenium, promoted cationic and activated monomer polymerization. These polymers used in a subsequent blocking step in which azo groups were decomposed and converted into initiating centres from which blocks were grown by means of free radical polymerization. This procedure was applied to specific systems in which cationic polymerizable monomers are tetrahydrofuran (THF), cyclohexene oxide (CHO) and epichlorohydrin (ECH), respectively, and the free radical polymerizable monomer is styrene (St).