Catalytic Polymerization Processes in Media Free of Solvents: the Kinetics, Productivity, Polymer Characteristics, and Enthalpy Changes

摘要

The processes of solid polyethyleneoxide (PEO), polyethylene (PE), and trans-1,4-polybutadiene (PB) formation at solid catalysts in gas-solid systems with no solvent are studied. For a monomer pressure of 760 Torr, maximum rates of 1.5·10~(-7), 1.2·10~(-5), and 4·10~(-7) (mol/s per 1 cm~3 of catalysts) are fixed for C_2H_4O, C_2H_4, and 1,4-C_4H_6 polymerization, respectively; therewith, potentialities of intensification of the reactions are not exhausted. The ΔH_(298)~0 values measured for reactions (MON)_((gas)) = (1/n) (-MON-)_(n(solid)) (MON is a monomer molecule) are equal to -107.5+- 2.5, -112.5+-2.5, and -140.5+-3.8 (kJ/mol) for PE, PB, and PEO, respectively.