Synthesis of poly(styrene-graft-ethylene oxide) by ethoxylation of amide group containing styrene copolymers

Patric Jannasch, Bengt Wesslén

Research output: Contribution to journalArticlepeer-review

Abstract

Graft copolymers containing poly(ethylene oxide) side chains on a polystyrene backbone have been synthesized. Styrene copolymers synthesized by free radical mechanism and containing between 5 and 15 mol % acrylamide or methacrylamide were used as backbones. The amide groups in the copolymers were ionized by using potassium tert-butoxide or potassium naphthalene, and grafting was achieved by utilizing the amide anions as initiator sites for the polymerization of ethylene oxide in 2-ethoxyethyl ether at 65°C. The graft copolymers were characterized with respect to molecular weight and composition using elemental analysis, NMR, gel permeation chromatography, IR, and viscosity measurements. The size of the side chains were between 600 and 2000 g/mol. GPC results from a hydrolyzed graft copolymer sample suggest a narrow size distribution for the poly(ethylene oxide) grafts. Solution properties of the graft copolymers were investigated in different toluene/methanol mixtures. The intrinsic viscosities of the graft copolymers were found to depend primarily on the poly(ethylene oxide) content rather than the graft density or the poly(ethylene oxide) chain length.
Original languageEnglish
Pages (from-to)1519-1529
JournalJournal of Polymer Science. Part A, Polymer Chemistry
Volume31
Issue number6
DOIs
Publication statusPublished - 1993

Bibliographical note

The information about affiliations in this record was updated in December 2015.
The record was previously connected to the following departments: Polymer and Materials Chemistry (LTH) (011001041)

Subject classification (UKÄ)

  • Chemical Sciences

Keywords

  • ANIONIC POLYMERIZATION OF ETHYLENE OXIDE
  • ETHOXYLATION
  • STYRENE OXIRANE GRAFT COPOLYMERS
  • GRAFTING
  • POLY(STYRENE-GRAFT-ETHYLENE OXIDE)
  • SOLUTION PROPERTIES
  • POLY(STYRENE-CO-ACRYLAMIDE)

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