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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
Autoclavable: No
Melting Point: 176°F 80°C
Tensile Strength: 6,500 psi
Hardness: R105
UV Resistance: Good
Clear
Rigid
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.
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