Study of structural, morphological and mechanical properties of PMMA, PVC and their blends

Abstract

PMMA, PVC and their five blends in different compositions were irradiated by γ -rays of 2 Mrad dose. A comparative study of structural, morphological and mechanical properties of irradiated and non-irradiated samples was carried out. The structural changes that have taken place due to irradiation are seen in the FTIR and X-ray diffraction (XRD) spectra. The ester group is mainly affected in PMMA and the blends. The XRD results have confirmed that the irradiated samples are more amorphous in nature than the non-irradiated ones. The DSC study reveals that some irradiated samples undergo cross-linking, whereas some of them undergo degradation. One of the irradiated blend compositions has become thermally more stable. The SEM study suggests that the irradiated samples have undergone curing. An improvement in the mechanical properties has been observed in some of the irradiated blend compositions.

Surface studies of UV-irradiated poly(vinyl chloride)/poly(methyl methacrylate) blends

“…Miscibility in this system can be explained by interactions occurring between carbonyl group of PMMA and hydrogen atom from H-C-Cl group of PVC (hydrogen bond), or between carbon atom from carbonyl group of PMMA and chlorine atom from Cl-C-H group of PVC (dipole-dipole interaction) [16][17][18][19][20][21][22][23].…”

Influence of acrylonitrile butadiene rubber on recyclability of blends prepared from poly(vinyl chloride) and poly(methyl methacrylate)

“…The absorbance spectra owing to polyene sequences were indicated by a small peak centred at 1600 cm −1 owing to the degradation of PVC phase in recycled blends (Kelkar and Soman, 2012). However, in Figure 4, FTIR spectra indicates that, on increasing the concentration of NBR in the recycled blend, the peak area and height owing to polyene sequences decreases to a certain extent.…”

Study of Rigid Cross-Linked PVC Foams with Heat Resistance

“…There are several methods to improve the heat resistance of a PVC resin, such as copolymerization [ 6 ], crosslinking [ 7 ], halogenation [ 8 ] and blending modifications [ 9 ]. Crosslinking occupies an important position in numerous modification methods, and plays an active role in overcoming the defects of PVC, such as low softening point and poor dimensional stability at elevated temperatures [ 10 ].…”