TY - JOUR
T1 - Interpolymer complexation and thermal behaviour of poly(styrene-co-maleic acid)/poly(vinyl pyrrolidone) mixtures
AU - Haddadine-Rahmoun, Nabila
AU - Amrani, Farouk
AU - Arrighi, Valeria
AU - Cowie, J. M G
PY - 2008/9/15
Y1 - 2008/9/15
N2 - 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.
AB - 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.
KW - Hydrogen-bonding
KW - Interpolymer complexes
KW - Modified Kwei equation
KW - Poly(styrene-co-maleic acid)
KW - Poly(vinyl pyrrolidone)
UR - http://www.scopus.com/inward/record.url?scp=50149116371&partnerID=8YFLogxK
U2 - 10.1016/j.tca.2008.06.013
DO - 10.1016/j.tca.2008.06.013
M3 - Article
SN - 0040-6031
VL - 475
SP - 25
EP - 32
JO - Thermochimica Acta
JF - Thermochimica Acta
IS - 1-2
ER -