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    PVC's Physical Properties

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    PVC have five obvious physical properties as following

    1. Fire retarding properties

    PVC has inherently superior fire retarding properties due to its chlorine content, even in the absence of fire retardants.

    2. Durability

    Under normal conditions of use, the factor most strongly influencing the durability of a material is resistance to oxidation by atmospheric oxygen. PVC, having the molecular structure where the chlorine atom is bound to every other carbon chain, is highly resistant to oxidative reactions, and maintains its performance for a long time.

    3. Oil/Chemical resistance

    PVC is resistant to acid, alkali and almost all inorganic chemicals. Although PVC swells or dissolves in aromatic hydrocarbons, ketones, and cyclic ethers, PVC is hard to dissolve in other organic solvents.

    4. Mechanical stability

    PVC is a chemically stable material, which shows little change in molecular structure, and also exhibits little change in its mechanical strength.

    5. Processability and mouldability

    The processability of a thermoplastic material depends largely on its melt viscosity. PVC is not suitable for injection moulding of large sized products, since its melt viscosity is comparatively high. On the other hand, the viscoelastic behaviour of molten PVC is less dependent on temperature and is stable.