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.
LanguageEnglish
Pages434-441
Number of pages8
JournalMacromolecules
Volume19
Issue number2
DOIs
Publication statusPublished - Feb 1986

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Polymer solutions
Neutron scattering
Polymers
Elastic scattering
Polystyrenes
Toluene
Cyclohexane
Light scattering
Swelling
Gels
Temperature

Keywords

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

Cite this

Davidson, N.S. ; Richards, R.W. ; Maconnachie, A. / Determination of correlation lengths in swollen polymer networks by small-angle neutron-scattering. In: Macromolecules. 1986 ; Vol. 19, No. 2. pp. 434-441.
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Determination of correlation lengths in swollen polymer networks by small-angle neutron-scattering. / Davidson, N.S.; Richards, R.W.; Maconnachie, A.

In: Macromolecules, Vol. 19, No. 2, 02.1986, p. 434-441.

Research output: Contribution to journalArticle

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T1 - Determination of correlation lengths in swollen polymer networks by small-angle neutron-scattering

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AU - Richards, R.W.

AU - Maconnachie, A.

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N2 - 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.

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KW - semidilute polymer solution

KW - swollen polymer network

KW - small-angle neutron-scattering

KW - polystyrene gel

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