Melting of High-and Low-Density Polyethylene in Mixtures with Aluminum after Plastic Deformation under High Pressure

摘要

Mixtures of low-and high-density polyethylene with aluminum were subjected to plastic deformation at a pressure of 0.5-4.0 GPa. DSC analysis showed that heating of samples at 110 and 140 degrees C results in addition to the melting of polymers in the melting of ultrafine polymer crystallites at 40 degrees C and also in chemical interaction at 80 degrees C at the polymer-metal phase interface; crystallization of the polymer phase in deformed mixtures occurs at 14-18 degrees higher than that of the initial polymers. Enthalpies of thermal processes in baric dependences reached extremum values at the pressures at which restructuring of the electron subsystem occurs in the deformed mixtures.