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Lavsan

Lavsan

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Lavsan

Polyethyleneterephthalate (PETF, the English Polyethyleneterephthalate (PET) also known as lavsan, polyester) — thermoplastic, the most widespread representative of a class of polyair, is known under different company names (see Names). A product of polycondensation of ethylene glycol with p-phthalic acid (or its dimethyl air). Solid, colourless, transparent substance in an amorphous state and white, opaque in a crystalline state. Passes into a transparent state when heating to temperature of vitrification and remains in it at sharp cooling and fast pass through a so-called "zone of crystallization". One of the PET important parameters is the characteristic viscosity determined by polymer molecule length. With increase in inherent viscosity the speed of crystallization decreases. It is strong, iznosostoyek, good dielectric.

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