Interpolymer complexation and thermal behaviour of poly(styrene-co-maleic acid)/poly(vinyl pyrrolidone) mixtures

Nabila Haddadine-Rahmoun, Farouk Amrani, Valeria Arrighi, J. M G Cowie

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10 Citations (Scopus)


Polymer complexation between poly(styrene-co-maleic acid), (SMA28) and (SMA50) containing 28 and 50 mol% of maleic acid and poly(vinyl pyrrolidone) (PVP), has been investigated by differential scanning calorimeter (DSC), Fourier-transform infrared spectroscopy (FTIR) and thermogravimetric analysis (TGA). All results showed that the ideal complex composition of SMA28/PVP and SMA50/PVP leads, respectively, to 2:1 and 1:1 mole ratio of interacting components. For the investigated systems, the Tg versus composition curve does not follow any of the usual proposed models for polymer blends. Withal, a new model proposed by Cowie et al. is used to fit the Tg data and it is found to reproduce the experimental results more closely. According to n and q obtained values, it seems reasonable to conclude that the inter-associated hydrogen bonds dominate in SMA28/PVP (2:1) complexes. This effect is corroborated by the FTIR study as evidenced by the high displacement of the specific bands and ionic interactions have been clearly identified. Finally, a thermogravimetric study shows that ionic interactions increase the thermal stability of these complexes. © 2008 Elsevier B.V. All rights reserved.

Original languageEnglish
Pages (from-to)25-32
Number of pages8
JournalThermochimica Acta
Issue number1-2
Publication statusPublished - 15 Sept 2008


  • Hydrogen-bonding
  • Interpolymer complexes
  • Modified Kwei equation
  • Poly(styrene-co-maleic acid)
  • Poly(vinyl pyrrolidone)


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