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Question:

What is the density of polyester?

What is the density of polyester?

Answer:

Poly (ethylene terephthalate) is prepared by esterification of terephthalic acid two methyl ester with ethylene glycol ester or esterification of terephthalic acid with ethylene glycol. The average molecular weight (2-3) x 104 of the crystalline saturated polyester is 1.5-1.8. The average molecular weight is equal to the molecular weight. The relative density is 1.368., the melting point is 225 DEG C, the flow temperature is 243 DEG C: the glass transition temperature is 80 DEG C, Martin is heat-resistant 80 DEG C, the thermal deformation temperature is 98 DEG C (1. 82MPa), and the decomposition temperature is 353 DEG C. With good mechanical properties, high rigidity, high hardness, low water absorption and good dimensional stability. Good toughness, impact resistance, friction resistance and creep resistance. Good chemical resistance, soluble in cresol, concentrated sulfuric acid, nitrobenzene, three chloroacetic acid, chlorophenol, insoluble in methanol, ethanol, acetone, alkane. Use temperature -100 ~ 120 degrees centigrade.
Polyester fiber is an important variety of synthetic fiber, and it is the commodity name of polyester fiber in our country. It is a pure terephthalic acid (PTA) or terephthalic acid methyl ester two (DMT) and ethylene glycol (EG) as a fiber polymer, polyethylene terephthalate as raw materials by esterification or transesterification and polycondensation prepared (PET), the spinning and postprocessing fibers.

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