THERMODYNAMIC PROPERTIES OF POLY(N-DECYL- ALPHA-CYANOACRYLATE), N-DECYL-ALPHA-CYANOACRYLATE, AND THE PROCESS OF THEIR POLYMERIZATION AT 10-430-K

The thermodynamic properties of n-decyl alpha-cyanoacrylate (DCA) and poly(n-decyl alpha-cyanoacrylate) (PDCA) were studied by adiabatic and isothermal calorimetry. Isobaric heat capacities C(p)0 were measured at 10 - 330 K (DCA) and at 14 - 430 K (PDCA). The thermodynamic parame ters of DCA melting, PDCA glass transition, and the heat of combustion of both compounds were determined. From the experimental data, the th ermodynamic functions H0(T) - H0(0), S0(T), and G0(T) - H0(0) at 0 - ( 330 - 420) K were calculated and the thermochemical parameters of form ation DELTAH(f)0 , DELTAS(f)0, and DELTAG(f)0 at 298.15 K and 101.325 kPa were evaluated. These data were used to calculate the enthalpy, en tropy, and Gibbs free energy for the bulk polymerization of n-decyl al pha-cyanoacrylate at 0 - 430 K and to estimate the upper limiting temp erature of the process.