Effect of ionic aggregation on ionomer chain dimensions. 1. telechelic polystyrenes

Richard Alan Register, Stuart L. Cooper, Pappannan Thiyagarajan, S. Chakrapani, Robert Jérôme

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Abstract

Carboxy-telechelic polystyrenes with degrees of polymerization of ca. 70 were examined by small-angle neutron scattering in the Na+ ionomer and methyl ester forms to ascertain the effect of ionic aggregation on the chain dimensions. The ionomers contain ionic aggregates, as demonstrated by small-angle X-ray scattering. The chain dimensions were found to be identical for the ionomer and ester, in agreement with the predictions of Squires et al. but in disagreement with the theories of Foreman and Dreyfus. Detailed analysis of the data showed that the contacts between the two isotopic types were random, as intended. The data were satisfactorily described by a polydisperse assembly of wormlike chains, with a Kuhn statistical length comparable to that for homopolystyrene.

Original languageEnglish (US)
Pages (from-to)2978-2983
Number of pages6
JournalMacromolecules
Volume23
Issue number11
DOIs
StatePublished - Jan 1 1990
Externally publishedYes

All Science Journal Classification (ASJC) codes

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

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