FTIR MICROSPECTROSCOPY AND DSC ANALYSIS OF BLENDS OF POLY(VINYLIDENE FLUORIDE) WITH ISOTACTIC AND SYNDIOTACTIC POLY(METHYL METHACRYLATE)

Films of blends of poly(vinylidene fluoride) (PVDF) with isotactic and syndiotactic poly(methyl methacrylate) (i-PMMA and s-PMMA), obtained by casting tetrahydrofuran (THF) and dimethyl sulphoxide (DMSO) soluti ons onto BaF2 windows, have been investigated by means of FTIR-microsp ectroscopy (FTIR-M), optical microscopy and differential scanning calo rimetry (DSC). The study of the effect of the PMMA tacticity on the in termolecular interaction between the two components, as well as on the structure, morphology and thermal behaviour of these blends, is the o bject of this paper. On the basis of the major shift of the carbonyl b and of i-PMMA in the mixtures, the occurrence of stronger interactions for PVDF/i-PMMA compared with PVDF/s-PMMA blends can be suggested. (C ) 1998 SCI.