The Improvement of Polyvinyl Chloride Synthesis Using Different Approaches

Abstract

Polyvinyl chloride (PVC) is produced by the polymerization of the vinyl chloride monomer either by direct chlorination of olefins or by addition of hydrogen chloride to acetylene. The polymerization conditions are: heat, peroxides or oxidizing agents with basic structure as -CH₂CHCl.CHCl-CH₂.CHCl-. Polyvinyl chloride is a thermoplastic and its plasticity can be increased by incorporating ‘plasticizers’ of relatively low molecular weight organic materials during molding or extrusion. PVC has high hardness and mechanical properties which enhances with the increasing of the molecular weight but decrease with the temperature increasing. It has good insulation properties though inferior to non-polar polymers such as polyethylene and polypropylene. It is a very versatile material and can be used in sheets, pipes, electric cables, wire rope, in upholstery and for waterproof outing clothing. Fibers of polyvinyl chloride have been developed.

Key words: Improvement, polyvinyl chloride, synthesis, different, approaches, temperature