Abstract
Heat capacities of solid polypentadecanolactone, polytridecanolactone, polyundecanolactone, polycaprolactone, polyvalerolactone, polybutyrolactone, polypropiolactone, polyglycolide, poly(ethylene oxalate), poly(butylene adipate) and poly(ethylene sebacate) were analysed using an approximate group vibration spectrum and fitting of the skeletal heat capacity to a Tarasov function. All polyesters have the same Θ 1 (513.6 ± 19 K) and Θ 3 varies less than would be expected with the variations due to crystallinity for polyethylene, and can be represented by a quadratic function of COO CH 2 . An addition scheme is proposed that is capable of predicting heat capacities of the polyesters with a precision close to experimental accuracy.
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