Physical ageing in poly(4-hydroxy styrene)/poly(vinyl methyl ether) blends

Valeria Arrighi, J. M G Cowie, Roderick Ferguson, Iain J. McEwen, Elizabeth Anne McGonigle, Richard A. Pethrick, Elisabetta Princi

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9 Citations (Scopus)


The influence of blend composition on enthalpy-relaxation behaviour was assessed for miscible blends of poly(4-hydroxy styrene)/poly(vinyl methyl ether) (PHS/PVME). Values of enthalpy lost (?H(Ta, ta)) were calculated from experimental data plotted against log (ta) and modelled using the Cowie-Ferguson (CF) expression. This gives a set of values for three adjustable parameters, ?H8(Ta), log (tc) and ß. Positron annihilation lifetime spectroscopy (PALS) measurements indicated that all of the blends, except the blend with 59 mol% of the PHS component, have greater free volume than pure PHS. Furthermore, infrared spectroscopy was useful for assessing the hydrogen-bonding interactions in the blends. The ageing results are discussed with reference to the strength of the interactions and free volumes, and are compared with related systems. © 2005 Society of Chemical Industry.

Original languageEnglish
Pages (from-to)749-756
Number of pages8
JournalPolymer International
Issue number7
Publication statusPublished - Jul 2006


  • Ageing
  • Blends
  • Enthalpy relaxation
  • FTIR spectroscopy
  • Hydrogen bonding


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