Multifunctional ATRP initiators: Synthesis of four-arm star homopolymers of methyl methacrylate and graft copolymers of polystyrene and poly(t-butyl methacrylate)

Polyxeni Moschogianni, Stergios Pispas, Nikolaos Hadjichristidis

Research output: Contribution to journalArticlepeer-review

51 Scopus citations

Abstract

Tetrakis bromomethyl benzene was used as a tetrafunctional initiator in the synthesis of four-armed star polymers of methyl methacrylate via atom transfer radical polymerization (ATRP) with a CuBr/2,2 bipyridine catalytic system and benzene as a solvent. Relatively low polydispersities were achieved, and the experimental molecular weights were in agreement with the theoretical ones. A combination of 2,2,6,6-tetramethyl piperidine-N-oxyl-mediated free-radical polymerization and ATRP was used to synthesize various graft copolymers with polystyrene backbones and poly(t-butyl methacrylate) grafts. In this case, the backbone was produced with a 2,2,6,6-tetramethyl piperidine-N-oxyl-mediated stable free-radical polymerization process from the copolymerization of styrene and p-(ch4loromethyl) styrene. This polychloromethylated polymer was used as an ATRP multifunctional initiator for t-butyl methacrylate polymerization, giving the desired graft copolymers.

Original languageEnglish (US)
Pages (from-to)650-655
Number of pages6
JournalJournal of Polymer Science, Part A: Polymer Chemistry
Volume39
Issue number5
DOIs
StatePublished - Mar 1 2001

ASJC Scopus subject areas

  • Polymers and Plastics
  • Organic Chemistry
  • Materials Chemistry

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