Configurational heat capacity of various polymers above the glass transition temperature

We estimated the configurational heat capacity for 21 types of polymers above the glass transition temperature (T-g) using molecular vibration analysis. The polymers for which the configurational heat capacity was determined are listed as follows: six types of linear polymers with a carbon backbone: poly(1-butene) (PBE), poly(methyl acrylate) (PMA), poly(1-hexene) (PHE), polyisoprene (PIP), poly(vinyl fluoride) (PVF), polypropylene (PP), eight types of polyesters: poly(glycolide) (PGL), poly(propiolactone) (PPL), poly(butyrolactone) (PBL), poly(valerolactone) (PVL), polycaprolactone (PCL), polyundecanolactone (PUDL), polytridecanolactone (PTDL) and polypentadecanolactone (PPDL), and seven types of poly(oxide): poly (oxytrimethylene) (PO3M), poly(oxytetramethylene) (PO4M), poly(oxypropylene) (POP), poly(oxymethylene-oxytetramethylene) (POMOM), poly(oxymethylene-oxyethylene) (POMOE), poly(oxyethylene) (POE), and PO4M), poly(oxy(2,6-dimethyl-1,4-phenylene)) (PODMP). As the temperature increases, the configurational heat capacity of all polymers decreases. Based on Landau's theory, the obtained heat capacity can be well reproduced by using power and logarithmic functions.