Accession Number:

ADA210698

Title:

Thermodynamic Principles of the Process of the Effect of Electromagnetic Fields on a Polymer Melt

Descriptive Note:

Corporate Author:

FOREIGN TECHNOLOGY DIV WRIGHT-PATTERSON AFB OH

Report Date:

1989-06-23

Pagination or Media Count:

12.0

Abstract:

The effect of electromagnetic fields on a polymer melt leads to an increase in the strength of polymers while magnetostatic field virtually does not have an effect on the immobile polymer melt. However, if relative motion of magnetic field and polymer melt occurs, then, according to the laws of electrodynamics, besides magnetic field in the polymer melt appears the electric field, which will interact with the macromolecules of polymer. As a result of this can be changed the structure of polymer melt, which will be fixedrecorded in proportion to cooling fusionmelt, which must immediately be reflected in the properties of solid polymer. Change in structure of polymer melt can be considered as peculiar phase transitions. Apparently, for the polymer melts besides the phase transformations of the first and second kind there are other, possibly, mixed phase transitions. We experimentally established presence of Delta T-effect in polymer melts, which is characteristic for phase second-order transformations. Therefore in this article we use theory of second-order phase transitions in application to the phenomena in question. Russian translations.

Subject Categories:

  • Physical Chemistry
  • Polymer Chemistry
  • Electromagnetic Pulses

Distribution Statement:

APPROVED FOR PUBLIC RELEASE