Miscibility of PVC/PMMA blends by vicat softening temperature, viscometry, DSC and FTIR analysis

Thermal degradation studies in poly(vinyl chloride)/poly(methyl methacrylate) blends

“…2 at 1780 and at 1643 cm À1 are due to interaction of acid chlorides produced from PVC during blend preparation with the PMMA chains. Thus, while some previous researchers [11,20] have suggested that a strong specific component interactions shift to about 4e 6 cm À1 in the carbonyl bond stretching peak, we found here a very small frequency shifts in the carbonyl infrared absorption, indicating that the intermolecular forces were fairly weak in the blended polymer components in the present work.…”

“…In case of C]O stretching bands the higher mass of oxygen atom and great rigidity of the bond lead to a shift which allows identification of associated and non-associated groups. Aouachria and Belhaneche-Bensemra [11] have described this work in detail and shown that the deconvolution of the C]O band within miscibility range gives two contributions, one corresponding to the non-bonded carbonyl groups in the blends around 1734 cm À1 and one at the lower wave numbers corresponding to the hydrogen bonded carbonyl groups around 1729 cm À1 . The spectroscopic studies performed on thin film of pure PMMA in the present work show the absorption peak of the carbonyl band of PMMA at 1731.26 cm À1 (Fig.…”

“…Deshpande and Singh [10], however, have shown by thermal studies that blends cast from MEK were immiscible for 50 wt% of PVC. Aouachria and Belhaneche-Bensemra [11,12] performed melt mixing of PVC and PMMA at 175 C and studied the miscibility using Vicat softening temperature, viscometry method based on a criterion of polymerepolymer miscibility, DSC and FTIR. They have shown these blends to be miscible up to 60 wt% of PMMA.…”

The effect of di-(-2-ethyl hexyl) phthalate (Dehp) as plasticizer on the thermal and mechanical properties of pvc/pmma blends

“…The corresponding data are given in Table 3. The results show that thermal decomposition of PMMA occurs at 301°C by statistical chain scissions followed by depolymerization and liberation of the pure monomer [11] . A 98 % weight loss is attained.…”

Polyvinyl Chloride / Attapulgite / Micro-crystalline Cellulose (MCC) Composites Preparation and Analysis of the Role of MCC as a Compatibilizer

“…However, the thermal stability of PVC is poor; it starts to decompose when heated to 100 °C, and the decomposition rate is accelerated when the temperature is over 150 °C (Braun 1981). Furthermore, the vicat softening temperatures (VSTs) of PVC materials are usually under 80 °C (Kamira and Naima 2006), which restricts its application. Therefore, various fillers have been used to improve the thermal performance of PVC in order to broaden the scope of its application.…”