Interpolymer radical coupling reactions during sonication of polymer solutions

Andrew H. Lebovitz, Maisha K. Gray, Adam C. Chen, John M. Torkelson*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

28 Scopus citations

Abstract

Interpolymer radical coupling was investigated in polymer solutions exposed to high-intensity ultrasound. Fluorescence-detection gel permeation chromatography was used to characterize the sonication product from solutions of blends of high-molecular weight polystyrene (PS)/pyrene-labeled PS and poly(n-butyl methacrylate)/pyrene-labeled PS, showing that, along with chain scission leading to macroradical formation, sonochemically induced reactions can lead to interpolymer radical coupling and measurable block copolymer on timescales of 2-4 min. This investigation provides evidence of rapid in situ block copolymer formation that has previously been inferred without proof in sonication studies of polymer blends and their solutions. It is also consistent with recent studies of melt and solid-state processing of blends indicating that in situ interpolymer radical coupling is useful in reactive compatibilization.

Original languageEnglish (US)
Pages (from-to)2823-2828
Number of pages6
JournalPolymer
Volume44
Issue number10
DOIs
StatePublished - Apr 11 2003

Keywords

  • Block copolymer formation
  • Interpolymer radical coupling
  • Sonication

ASJC Scopus subject areas

  • Organic Chemistry
  • Polymers and Plastics
  • Materials Chemistry

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