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


Cakmak I.

NEW POLYMERIC MATERIALS, cilt.5, sa.2, ss.159-167, 1998 (SCI İndekslerine Giren Dergi) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 5 Konu: 2
  • Basım Tarihi: 1998
  • Dergi Adı: NEW POLYMERIC MATERIALS
  • Sayfa Sayıları: ss.159-167

Özet

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.