Vinyl Chloride Addition Polymerization

Vinyl acetate is an industrial chemical that is produced in large amounts in the united states.

Vinyl chloride addition polymerization.

Vinyl chloride liquid is fed to polymerization reactors where it is converted from a monomeric vcm to a polymeric pvc. Polymerization of vinyl chloride vc was studied. When treated with certain catalysts vinyl chloride monomers undergo polymerization and form the larger compound known as polyvinyl chloride or pvc. Polyvinyl chloride is produced in an addition polymerisation reaction from chloroethene vinyl chloride monomers.

Often anionic polymerization involves living polymerizations which allows control of structure and composition. About 80 of production involves suspension polymerization. Vinyl acetate is used to make other industrial chemicals. Emulsion polymerization accounts for about 12 and bulk polymerization accounts for 8.

Pvc is used in the manufacture of numerous products including packaging films and water pipes. The final product of the polymerization process is pvc in either a flake or pellet form. Under pressure the gaseous chloroethene molecules are forced closer together to form a liquid. Vinyl chloride suspension polymerization was carried out in a pilot scale reactor to study the effects of different methods of initiator addition on poly vinyl chloride pvc resin properties.

Free radical polymerization frp is a method of polymerization by which a polymer forms by the successive addition of free radical building blocks. It is very flammable and may be ignited by heat sparks or flames. Following its generation the initiating free radical adds nonradical monomer units thereby growing the polymer chain. From its flake or pellet form pvc is sold to companies that heat and mold the pvc into end products such as pvc pipe and bottles.

Vinyl chloride is a chlorinated hydrocarbon occurring as a colorless highly flammable gas with a mild sweet odor that may emit toxic fumes of carbon dioxide carbon monoxide hydrogen chloride and phosgene when heated to decomposition. The type of reaction has many manifestations but traditionally vinyl monomers are used. Vinyl chloride is primarily used to make polyvinyl chloride to manufacture plastics. The monomer chloroethene or vinyl chloride has a boiling point of 14 o c 259k so it is a gas at room temperature and pressure.

Natural evolution of hcl from vc occurred in the polymerization. Free radicals can be formed by a number of different mechanisms usually involving separate initiator molecules. It is a clear colorless liquid with a sweet fruity smell.