Friday 14 November 2014

What is PVC???

Polyvinyl chloride or PVC in short, is a plastic which has a chemical formula of CH2=CHCI .It is a thermoplastic that contains high levels of chlorine which can reach up as high as 57% and the other 43% of it is made of carbon which is derived from oil and gas involved in the PVC fabrication. PVC is produced by polymerization of the monomer vinyl chlorine (VCM). The high level of chlorine is obtained and manufactured by the electrolysis of sodium chloride which is a salt. The chlorine is then being combined with ethylene that has been produced from the oil. The result of the both element produces ethylene dichloride, which is converted at a very high temperatures to vinyl chloride monomer. These monomer molecules are then polymerized to form polyvinyl chloride resin. Moreover, PVC which is a thermoplastic material is useful in the industries as they have the characteristics that it can be melted again and again. These materials can be heated to a certain temperature and will harden again as they cold down. This odourless and solid plastic that is white, brittle can be found on the market in the form of pellets or white powder. It is also highly resistance to oxidation and degradation makes it possible to store material for long period of time.

Uses of PVC
-Predominant in the construction industry due to low cost, ease to mold and light in term of weight
-Used as a replacement for metal where corrosion can be compromise functionality and maintenance cost can be escalate
-Used to make pipe fitting and pipe conduits as it is installation flexible where they can be connected with the use of joints, solvent cements and special glues
-PVC is also present in electrical components such as electrical insulation and cable coating
-In the health care industry it is used to make feeding tubes, blood bags, intravenous (IV) bags, parts of dialysis devices and many more items
-In daily use, it is used to make raincoats, plastic bags, toys, credit cards, doors, hoses and many more


Advantages
-Light in weight
-Biocompatible
-Clarity and transparency
-Resistance to chemical stress cracking
-Low thermal conductivity
-Little to no maintenance
-Can be recycled and converted into a newer product
-Chemical stability

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