Improvement of Thermal Properties of Poly(vinyl chloride) Using Chemical Blending Assisted Ultrasonic Technique

Abstract

The thermal stabilization of poly(vinyl chloride) through blending techniques has been studied. Poly(vinyl chloride) was blended with modified polymer (cellulose acetate-diallyl amine) in different compositions to improve the thermal stability of poly(vinyl chloride). The thermal stability and morphology of the blend films were characterized by scanning electron microscope (SEM) and thermogravimetry. The results revealed that the presence of modified cellulose acetate improved the thermal stability of poly(vinyl chloride). This was attributed to the thermal stable diallylamine moieties among the cellulose acetate chains. The addition of traces of maleimide derivatives to poly(vinyl chloride) prior to the blend process led to an extra thermal stability of the blend film as shown from the values of the initial decomposition temperature (To) measured by thermogravimetry.

Modification of Poly(vinyl chloride) by N-Phenyl Itaconimides for the Improvement of Its Thermal Stability

“…All N-(substituted phenyl)itaconimide derivatives (N-(RPh)IM) were prepared by two steps described by Adam [6]. In the first step, 1 mol of itaconic anhydride was dissolved in dry diethyl ether and then, 1 mol of the primary amine dissolved in the same solvent was slowly added to the itaconic anhydride at 0-5°C for 3 hours.…”

“…us, labile sites, tertiary and allyl chlorine atoms, should be replaced by more stable groups before the molding process. is occurs through chemical modification [2,3], graft copolymerization [2,4,5], or simply adding various thermal stable compounds [6,7].…”