Graft copolymerization of methyl methacrylate with an N-substituted maleimide-liquid-crystalline copolymer by atom transfer radical polymerization


Cakir T. , ONEN A., Serhatlı İ. E.

JOURNAL OF APPLIED POLYMER SCIENCE, vol.107, no.4, pp.2074-2081, 2008 (Journal Indexed in SCI) identifier identifier

  • Publication Type: Article / Article
  • Volume: 107 Issue: 4
  • Publication Date: 2008
  • Doi Number: 10.1002/app.27227
  • Title of Journal : JOURNAL OF APPLIED POLYMER SCIENCE
  • Page Numbers: pp.2074-2081

Abstract

The synthesis of novel copolymers consisting of a side-group liquid-crystalline backbone and poly (methyl methacrylate) grafts were realized by the use of atom transfer radical polymerization (ATRP). In the first stage, the bromine-functional copolymers 6-(4-cyanobiphenyl-4 '-oxy)hexyl acrylate and (2,5-dioxo-2,5-dihydro-1H-pyrrole-1-yl)methyl 2-bromopropanoate were synthesized by free-radical polymerization. These copolymers were used as initiators in the ATRP of methyl methacrylate to yield graft copolymers. Both the macroinitiator and graft copolymers were characterized by H-1-NMR, gel per-meation chromatography, differential scanning calorimetry, and thermogravimetric analysis. The ATRP graft copolymerization was supported by an increase in the molecular weight of the graft copolymers compared to that of the macroinitiator and also by their monomodal molecular weight distribution. (c) 2007 Wiley Periodicals, Inc.