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Intrinsic Viscosity of the PET in question cannot be said to be higher or lower. The intrinsic viscosity of the polymer depends on the degree of condensation achieved in the polycondensation phase of the PET manufacturing process.

Since Intrinsic Viscosity(limiting to zeo concentration) is the relative measure of the molecular weight or chain-length of the polymer, one cannot say that molecular weight thus the intrinsic viscosity of PET is higher, this depends on the degree of condensation. Usually the degree of condensation of PET used in fibre manufacture is approx. [n]100.

We can manufacture PET to different degrees of condensation for different purposes.

Generally, PET has a higher molecular weight than other thermoplastic resins. Melting point of PET is also high approx. 250oC to 290oC

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