THERMODYNAMIC PROPERTIES OF AN ALTERNATIN G FURAN-MALEIC ANHYDRIDE COPOLYMER IN THE TEMPERATURE-RANGE 0-420 K

The temperature dependence of the heat capacity C-p(0) = f(T), and the temperatures an enthalpies of physical transitions were studied by ad iabatic-vacuum and dynamic calorimetry in maleic anhydride and an alte rnating copolymer of furan and maleic anhydride in the temperature ran ge from 5 to 420 K, The energy of combustion Delta U-c(p) of maleic an hydride at T = 298.15 K was measured with the aid of a static-bomb iso thermal-shell calorimeter, Using the experimental data, the thermodyna mic functions of the copolymer and maleic anhydride, including C-p(0)( T), H-0(T)-H-0(0), S-0(T), and G(0)(T)-H-0(0), are calculated at 0-350 K and the standard pressure. The enthalpy of combustion Delta H-c(0) and the thermochemical parameters of copolymer formation are calculate d for T = 298.15 K and p = 101.325 kPa. The results of these calculati ons are used to calculate the thermodynamic parameters for the copolym erization reaction.