Triblock copolymers via macro-iniferters: block copolymers of epichlorhydrin with styrene and methyl methacrylate


Cakmak I.

NEW POLYMERIC MATERIALS, vol.5, no.2, pp.159-167, 1998 (Journal Indexed in SCI) identifier identifier

  • Publication Type: Article / Article
  • Volume: 5 Issue: 2
  • Publication Date: 1998
  • Title of Journal : NEW POLYMERIC MATERIALS
  • Page Numbers: pp.159-167

Abstract

A route for preparing block copolymers by the combination of cationic and free radical photopolymerization is examined. For this purpose, a growing polyepichlorhydrin (PECH) chain, prepared by using HBF(4) as an initiator, was terminated by the addition of the sodium salt of N,N-diethyl dithiocarbamate. PECH possessing a thiuram disulfide group at the chain end thus obtained was used in the photo-induced polymerization of styrene to yield active poly(epichlorhydrin-b-styrene) block copolymers. These active block copolymers were also used in the photopolymerization of methyl methacrylate to obtain ABC-type triblock copolymers. The block copolymers were characterized by spectroscopic methods, fractional precipitation, and gel permeation chromatography.