Polyvinyl chloride is one of the cheapest and most widely used plastics globally. It is a thermoplastic having good resistance to alkalis, salts, and highly polar solvents, and it is flame retardant due to the presence of chlorine in the structure. The presence of chlorine makes it flame retardant. But PVC is not thermally stable at higher temperatures. Plasticizers are added to PVC for safe processing due to its thermal instability at high temperature [17]. In automobile industry, it is used for the fabrication of internal lining, protective covering of bottom flooring cars, and coating of electric cables in vehicles. It has excellent properties like good flexibility, flame retardancy, good thermal stability and high gloss and low lead content, diversity of manufacturing procedures, and easy to paste, print and weld [16]. It is used for the large scale production of cable insulations, equipment parts, pipes, laminated materials, and in fiber manufacture. The PVC polymer can be blow molded, calendared, injection molded, and compression molded to form a large varieties of products. Depending upon the amount and type of plasticizers used, the product formed from the PVC is either rigid or flexible. Its vinyl content that gives good tensile strength. It has good resistant to chemical and solvent attack. Colored or transparent material is also available. It is used in automobile instrument panels and sheathing of electrical cables.
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