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A study on the polycondensation of bis-hydroxyethyl terephthalate

โœ Scribed by Chen-Chong Lin; Satish Baliga

Publisher
John Wiley and Sons
Year
1986
Tongue
English
Weight
330 KB
Volume
31
Category
Article
ISSN
0021-8995

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โœฆ Synopsis

Poly(ethy1ene terephthalate) (PET) was synthesized from its monomer bis-hydroxyethyl terephthalate (BHET), in the presence of Sb,O, catalyst. A second order irreversible reaction model was developed, and the apparent rate constant was evaluated by observing the course of intrinsic viscosity change. At 27VC, the apparent rate constant in the presence of 0.025% (by weight) of Sbz09 was found to be 0.945 L/mol h.

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The kinetics of polycondensation and copolycondensation reactions of bis(3hydroxypropyl) terephthalate (BHPT) and bis(2-hydroxyethyl) terephthalate (BHET) as monomers were investigated at 270ยฐC, in the presence of titanium tetrabutoxide (TBT) as a catalyst. BHPT was prepared by ester interchange rea