Determination of correlation lengths in swollen polymer networks by small-angle neutron-scattering

N.S. Davidson, R.W. Richards, A. Maconnachie

Research output: Contribution to journalArticle

16 Citations (Scopus)

Abstract

The analogy between semidilute polymer solutions and swollen polymer networks is reviewed and some implications of current theories are considered. Small-angle neutron scattering has been used to measure a characteristic correlation length in randomly cross-linked polystyrene gels at swelling equilibrium in cyclohexane over the range 308-333 K and in toluene at ambient temperature. The equilibrium polymer volume fraction ranged from ca. 0.01 to 0.3, depending on the cross-link density and the solvent used. These results, together with those from earlier quasi-elastic light scattering measurements, were compared with reported scaling laws for polymer solutions. Although similar behavior was noted, the presence of permanent cross-links restricts the region wherein strong excluded volume effects are evident.
Original languageEnglish
Pages (from-to)434-441
Number of pages8
JournalMacromolecules
Volume19
Issue number2
DOIs
Publication statusPublished - Feb 1986

Keywords

  • semidilute polymer solution
  • swollen polymer network
  • small-angle neutron-scattering
  • polystyrene gel

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