SYNTHESIS OF PS-PEG AND PMMA-PEG BRANCHED BLOCK COPOLYMERS BY MACROINIMERS


HAZER B.

JOURNAL OF MACROMOLECULAR SCIENCE-CHEMISTRY, pp.47-52, 1991 (Journal Indexed in SCI) identifier identifier

  • Publication Type: Article / Article
  • Volume:
  • Publication Date: 1991
  • Doi Number: 10.1080/00222339108054382
  • Title of Journal : JOURNAL OF MACROMOLECULAR SCIENCE-CHEMISTRY
  • Page Numbers: pp.47-52

Abstract

A new type of macroinimers were synthesized by the capping reaction of hydroxyl groups of polyazoesters with isocyanato ethyl, methacrylate in the presence of dibutyl tin dilaurate. Macroinimers having PEG-400 and PEG-1500 units were used in the polymerization of methyl methacrylate (MMA) or styrene (S) to obtain PS-PEG or PMMA-PEG branched block copolymers at 60-degrees-C. Longer polymerization times or higher macroinimer concentrations led to cross-linked block copolymers. Similarly neat homopolymerization of macroinimers also led to the cross-linked polyethyleneglycols. The products were characterized by IR and NMR spectroscopy, viscosity measurements and fractional precipitation.