G. Bauduin et al., Poly(vinylidene fluoride) poly(vinyl alcohol-co-vinyl acetate) blends: 2. Study by infrared spectroscopy, EUR POLYM J, 35(2), 1999, pp. 293-303
Blends of poly(vinylidene fluoride) (PVDF) and some poly(vinyl alcohol-co-v
inyl acetate) copolymers (PVAAc) with various molecular weights and acetate
contents are studied by Fourier transform infrared spectroscopy (FTIR). Fi
rst. two sets of blends of PVDF with two different copolymers at various co
ncentrations are analysed. Then, 50/58 (wt/wt) blends of seven PVAAc with P
VDF are studied. Two carbonyl bands are observed corresponding to free and
bonded carbonyls. The rate of bonded carbonyls and the interaction enthalpi
es are determined. The results are in good agreement with the occurrence of
a rather strong interaction between the carbonyls of the residual acetate
groups and the hydroxyl groups of the copolymers. No interaction between th
e carbonyls and PVDF were observed. The experimental results are in a good
agreement with the foresights of the Coleman-Graf-Painter interaction model
. (C) 1998 Elsevier Science Ltd. All rights reserved.