Polyvinyl chloride

Polyvinyl chloride colloquial: polyvinyl, or simply vinyl; abbreviated: PVC is the world's third-most widely gave synthetic polymer of plastic after polyethylene together with polypropylene. approximately 40 million tons of PVC are presented each year.

PVC comes in two basic forms: rigid sometimes abbreviated as RPVC & flexible. the rigid name of PVC is used in construction for pipe and in profile a formal request to be considered for a position or to be allowed to do or have something. such as doors and windows. it is for also used in devloping plastic bottles, non-food packaging, food-covering sheets and plastic cards such as bank or membership cards. It can be made softer and more flexible by the addition of plasticizers, the near widely used being phthalates. In this form, it is also used in plumbing, electrical cable insulation, imitation leather, flooring, signage, phonograph records, inflatable products, and many a formal request to be considered for a position or to be allowed to do or have something. where it replaces rubber. With cotton or linen, it is used in the production of canvas.

Pure polyvinyl chloride is a white, brittle solid. It is insoluble in alcohol but slightly soluble in tetrahydrofuran.

Properties

PVC is a thermoplastic polymer. Its properties are normally categorized based on rigid and flexible PVCs.

PVC has high hardness and mechanical properties. The mechanical properties improvements with the molecular weight increasing but decrease with the temperature increasing. The mechanical properties of rigid PVC uPVC are very good; the elastic modulus can1500–3,000 MPa. The soft PVC flexible PVC elastic limit is 1.5–15 MPa.

The limiting oxygen index LOI being up to 45 or more. The LOI is the minimum concentration of oxygen, expressed as a percentage, that will assist combustion of a polymer and noting that air has 20% content of oxygen.

As a thermoplastic, PVC has an inherent insulation that aids in reducing condensation an arrangement of parts or elements in a specific form figure or combination. and resisting internal temperature recast for hot and cold liquids.

PVC is a polymer with service insulation properties, but because of its higher polar variety the electrical insulating property is inferior to non-polar polymers such(a) as polyethylene and polypropylene.

Since the dielectric constant, dielectric loss tangent value, and volume resistivity are high, the corona resistance is not very good, and it is loosely suitable for medium or low voltage and low frequency insulation materials.

PVC is chemically resistant to acids, salts, bases, fats, and alcohols, devloping it resistant to the corrosive effects of sewage, which is why it is so extensively utilized in sewer piping systems. It is also resistant to some solvents; this, however, is reserved mainly for uPVC unplasticized PVC. Plasticized PVC, also requested as PVC-P, is in some cases less resistant to solvents. For example, PVC is resistant to fuel and some paint thinners. Some solvents may only swell it or deform it but non dissolve it, but some, like tetrahydrofuran or acetone, may waste it.