List any four properties of plastics.
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Plastics can also be classified by: their various physical properties, such as: hardness, density, tensile strength, resistance to heat and glass transition temperature, and by their chemical properties, such as the organic chemistry of the polymer and its resistance and reaction to various chemical products and .
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Most plastics are light, chemically stable and do not rust.
Good impact resistance.
Good transparency and wear resistance.
Good insulation, low thermal conductivity.
General formability, good coloring, low processing cost.
Most plastics have poor heat resistance, high thermal expansion rate and easy combustion.
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