Microstructure and solvent distribution in cross-linked diblock copolymer gels

D. A. Durkee, E. D. Gomez, M. W. Ellsworth, A. T. Bell, N. P. Balsera

Research output: Contribution to journalArticlepeer-review

9 Scopus citations

Abstract

Gels were created by irradiating poly(α-methylstyrene-block-isoprene) (PaMS-I) and poly(vinylferrocenium triflate-Wocfc-isoprene) (PVFT-I) copolymers with an electron beam and swelling the resulting cross-linked solids in good solvents. The radiation cross-links the polyisoprene (PI) block, induces chain scission of the poly(α-methylstyrene) block (PaMS), and has no effect on the poly(vinylferrocenium triflate) (PVTF) block. After extraction of un-cross-linked chains, the PaMS-I gels comprise sol vent-filled, open channels inside a swollen PI network, while the swollen PVFT-I gels comprise channels of solvated PVFT chains inside a swollen PI network, The dependence of the structure, composition, and cross-linking density of the swollen microphases on radiation dose is determined by combining small-angle neutron scattering experiments with conventional gel characterization methods.

Original languageEnglish (US)
Pages (from-to)5103-5110
Number of pages8
JournalMacromolecules
Volume40
Issue number14
DOIs
StatePublished - Jul 10 2007

All Science Journal Classification (ASJC) codes

  • Organic Chemistry
  • Polymers and Plastics
  • Inorganic Chemistry
  • Materials Chemistry

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