Analyse de la relations structure-proprietes des melanges PVC-PMMA

Analysis of Structure-Properties Relationship of PVC-PMMA Blends. This paper presents a study of the structure-properties relationship of PVC-PMMA blends. For that purpose, blends of variable compositions from 0 to 100 wt % were prepared. Their physico-chemical characterization was carried out by differential scanning calorimetric analysis (DSC) and Fourier Transform Infrared spectroscopy (FTIR). The analysis of thermograms showed polymer miscibility up to 60 wt % PMMA. This miscibility is due to a specific interaction of hydrogen bonding type between carbonyl groups (C+O) of PMMA and hydrogen from (CHCl) groups of PVC. The two-band deconvolution showed an increase in associated groups percentage in the domain of miscibility. The variation of mechanical properties such as tensile behaviour, hardness and impact resistance was investigated for all blend compositions. The effect of a plasticizer on the same properties was considered. The obtained results show that a range of properties can be generated according to the blend compositions.