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Polyvinyl Chloride Presentation

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POLYVINYL CHLORIDE Chudasama Yuvrajsinh Lad Kevikumar Mohammed Adhil Nitin M. Bhanu Sachin Thomas Tilara Viraj POLY VINYL CHLORIDE The third-most widely produced polymer, after polyethylene and polypropylene HISTORY OF P.V.C. ❑ 19th century: PVC was accidentally discovered at least twice. ❑ ▪ 1835 : by French chemist Henri Victor Regnault ▪ 1872 : by German chemist Eugen Baumann 20th century: ▪ Russian chemist Ivan Ostromislensky and Fritz Klatte of the German chemical company Griesheim-Elektron both attempted to use PVC in commercial products. ▪ Waldo Semon and the B.F. Goodrich Company developed a method in 1926 to plasticize PVC by blending it with various additives. The result was a more flexible and more easily processed material that soon achieved widespread commercial use. PRODUCTION ❑ Polyvinyl chloride is produced by polymerization of the monomer vinyl chloride. ❑ Manufacturing of P.V.C. is mainly by SUSPENSION polymerisation; it can also be prepared by EMULSION and BULK polymerization(INITIATOR : Lauroyl Peroxide). ❑ PVC can be prepared by Ziegler-Natta catalysis. Initiator Molecule 1. SUSPENSION POLYMERISATION  About 80% of production involves suspension polymerization.  Vinyl chloride monomer is pressurized and liquefied in polymerization reactor with water and suspending agents.  Droplets are obtained after high speed agitation.  Initiator for polymerization is fed into the reactor under a few bars at ...
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