Controlled Synthesis of Hyperbranched Polymers by TEMPO-Mediated Radical Polymerization

Ciftci M.

JOURNAL OF PHOTOPOLYMER SCIENCE AND TECHNOLOGY, vol.32, no.6, pp.759-762, 2019 (SCI-Expanded) identifier

  • Publication Type: Article / Article
  • Volume: 32 Issue: 6
  • Publication Date: 2019
  • Journal Name: JOURNAL OF PHOTOPOLYMER SCIENCE AND TECHNOLOGY
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.759-762
  • Istanbul Technical University Affiliated: Yes

Abstract

Branched polymers with tunable branching densities are prepared by TEMPO-mediated radical polymerization. Thus, styrene is copolymerized with 4-methacryloyloxy-2,2,6,6-tetramethylpiperidine-1-oxyl (TEMPO methacrylate) by using 2,2'-azobis(2-methylpropionitrile) (AIBN) as initiator at 125 degrees C. The method is based on the use of TEMPO methacrylate as branching unit that possessing a nitroxyl stable radical moiety as propagation radical trap and a polymerizable methacrylate group. Depending on the concentration of TEMPO methacrylate and polymerization time, hyperbranched polymers with different branching densities are obtained.