| Popis: |
Adiabatic and isothermal calorimetry have been used to study the thermodynamic properties of allyloxy-ethyl-α-cyanoacrylate and polyallyloxyethyl-α-cyanoacrylate and the following properties have been determined: the isobaric heat capacity of the monomer and the polymer in the range 11–330 K, the glass-transition parameters and the parameters of the glassy state of the monomer, the energy of combustion of the monomer and the polymer. The following thermodynamic functions have been calculated from the experimental data obtained: H0(T) − H0(0), S0(T) and G0(T) − H0(0) for the range 0–330 K, and the enthalpy of combustion and the thermodynamic parameters of formation, ΔHf0, ΔSf0 and ΔGf0. These results been used to calculate the enthalpy, entropy and the Gibbs function for the polymerization of allyloxyethyl-α-cyanoacrylate in bulk in the range 0–330 K and the upper limiting temperature for polymerization has been estimated. |
