THERMODYNAMIC PROPERTIES OF POLYPENTANAL AND THE PROCESS OF ITS PREPARATION BY THE BULK-POLYMERIZATION OF PENTANAL AT 0-330-K AND STANDARD PRESSURE

The heat capacity of polypentanal was studied by adiabatic vacuum calo rimetry at 10 - 330 K, and the thermodynamic parameters of the melting and the glass transition of the polymer were evaluated. Using these d ata, the thermodynamic functions of the polymer at 0 - 330 K were dete rmined. These results, together with the published thermodynamic prope rties of pentanal and its polymerization enthalpy, were used to calcul ate the enthalpy, entropy, and Gibbs free energy for the bulk polymeri zation of pentanal at 0 - 330 K. The upper limiting polymerization tem peratures were estimated for crystalline and elastomeric states of the final polymer.