V. A. Zhorin*, V. S. Svistunov**, A. N. Zelenetskii**, I. S. Reshetnikov**,
and A. N. Ozerin**
* Semenov Institute of Chemical Physics, Russian Academy of Sciences,
ul. Kosygina 4, Moscow, 117977 Russia
** Institute of Synthetic Polymeric Materials, Russian Academy of Sciences,
Profsoyuznaya ul. 70, 117393 Russia
Received April 1, 1998;
Revised Manuscript Received September 17, 1998
Abstract—Heats of fusion of LDPE, ultrahigh-molecular-mass PE (UHMPE), PP, and their binary blends were
studied after their plastic flow at a pressure of 1 and 2 GPa. The pressure treatment of LDPE and UHMPE results
in an increase (by about 50%) in the heat of fusion of these polymers, while the same treatment of PP leads to
a decrease in the melting temperature by 10°C. Effect of the composition of a binary polymer blend on the heat
of fusion of each component was studied for the LDPE–UHMPE, LDPE–PP, and UHMPE–PP blends. It was
established that the application of magnetic field to polymers in the course of deformation under high pressure
favors a decrease in the heats of fusion.
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