J. Mathew, R. S. Ghadage, S. Ponrathnam
Jul 1, 1994
Citations
0
Influential Citations
22
Citations
Journal
Macromolecules
Abstract
Kinetics of copolyesterification between poly(ethylene terephthalate) and 4-acetoxybenzoic acid (PET/ABA) in the melt has been analyzed using a phenomenological approach. A parallel second-order reaction sequence neatly summarizes catalyzed and uncatalyzed homopolyesterifications of 4-acetoxy benzoic acid (ABA) as well as the PET/ABA copolyesterification. Single stage kinetics fits the data reasonably well since the length of orybenzoate sequences in the copolyester chain seldom exceed 5. Close correspondence exists between the kinetic parameters determined for the first stage of 4-acetorybenzoic acid homopolyesterifirntion, prior to oligomer precipitation, and those obtained in the present study through a least squared procedure