PREPARATION OF MULTIPHASE BLOCK-COPOLYMERS BY REDOX POLYMERIZATION PROCESS .4. POLYMERIZATION OF METHYL-METHACRYLATE BY THE REDOX SYSTEM MN(III)-POLY(ETHYLENE GLYCOL) CONTAINING AZO GROUPS


CAKMAK I.

ANGEWANDTE MAKROMOLEKULARE CHEMIE, vol.224, pp.49-54, 1995 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 224
  • Publication Date: 1995
  • Doi Number: 10.1002/apmc.1995.052240105
  • Journal Name: ANGEWANDTE MAKROMOLEKULARE CHEMIE
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.49-54
  • Karadeniz Technical University Affiliated: No

Abstract

Redox polymerization of methyl methacrylate using Mn(III) with poly(ethylene glycol) having azo and hydroxy functions was carried out to yield ethylene glycolmethyl methacrylate block copolymers with labile azo linkages in the main chain. These prepolymers were used to initiate free-radical polymerization of styrene through thermal decomposition of the azo groups, resulting in the formation of multiblock copolymers. Successful blocking has been confirmed by fractional precipitation, a strong change in the molecular weight, and spectral measurements.