*** Welcome to piglix ***

UPVC

Polyvinyl chloride
Repeating unit of PVC polymer chain.
Space-filling model of a part of a PVC chain
Pure Polyvinyl Chloride powder.jpg
Names
IUPAC name
poly(1-chloroethene)
Other names
Polychloroethylene
Identifiers
Abbreviations PVC
ChEBI
ChemSpider
  • none
ECHA InfoCard 100.120.191
KEGG
MeSH Polyvinyl+Chloride
Properties
(C2H3Cl)n
−10.71×10−6 (SI, 22°C)
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Infobox references
Mechanical properties
Elongation at break 20–40%
Notch test 2–5 kJ/m2
Glass Transition Temperature 82 °C (180 °F)
Melting point 100 °C (212 °F) to 260 °C (500 °F)
Effective heat of combustion 17.95 MJ/kg
Specific heat (c) 0.9 kJ/(kg·K)
Water absorption (ASTM) 0.04–0.4
Dielectric Breakdown Voltage 40 MV/m

Polyvinyl chloride (/ˌpɒlivnəl ˈklɔərd/), more correctly but unusually poly(vinyl chloride), commonly abbreviated PVC, is the world's third-most widely produced synthetic plastic polymer, after polyethylene and polypropylene.

PVC comes in two basic forms: rigid (sometimes abbreviated as RPVC) and flexible. The rigid form of PVC is used in construction for pipe and in profile applications such as doors and windows. It is also used for bottles, other non-food packaging, and cards (such as bank or membership cards). It can be made softer and more flexible by the addition of plasticizers, the most widely used being phthalates. In this form, it is also used in plumbing, electrical cable insulation, imitation leather, signage, phonograph records, inflatable products, and many applications where it replaces rubber.

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

PVC was accidentally synthesized in 1872 by German chemist Eugen Baumann. The polymer appeared as a white solid inside a flask of vinyl chloride that had been left exposed to sunlight. In the early 20th century the Russian chemist Ivan Ostromislensky and Fritz Klatte of the German chemical company Griesheim-Elektron both attempted to use PVC in commercial products, but difficulties in processing the rigid, sometimes brittle polymer thwarted their efforts. 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.


...
Wikipedia

...