Plastic Properties of Polyvinylchloride (PVC)
Polyvinylchloride (PVC) has a linear structure similar to polyethylene but with a chlorine atom replacing a hydrogen atom on alternate carbon atoms. PVC itself is hard and rigid but the addition of phthalate esters as plasticizers makes it soft and pliable and ideal for gloves, photographic dishes and tubing. Polyvinylchloride is generally transparent with a bluish tint. It is attacked by many organic solvents but it has a very good resistance to oils and it has a low permeability to gases. In its rigid from PVC is available in sheets which can readily be welded to produce tanks, trays and troughs. It is not recommended for use above 70° Celsius although it can be taken to 80° for short periods.
PVC Resistance: Excellent resistance (no attack) to Dilute and Concentrated Acids, Alcohols, Bases, Aliphatic Hydrocarbons and Mineral Oils. Good resistance (minor attack) to Vegetable Oils and Oxidizing Agents. Poor resistance (not recommended for use) with Aldehydes, Esters, Aromatic and Halogenated Hydrocarbons, and Ketones.
PVC Quick Facts:
Maximum Temperature: 158°F 70°C
Minimum Temperature: -13°F -25°C
Melting Point: 176°F 80°C
Tensile Strength: 6,500 psi
UV Resistance: Good
Specific Gravity: 1.34
PVC Fabrication: This unique material is glueable and weldable. Supplied in gray, white, and clear, in sheet, rod, or tubing. PVC is very machineable and heat bends nicely. This is a popular material for tanks and fittings. PVC is commonly used for nuts, bolts, ducts, hoods, and process tanks.