METHOD OF POLYMERS THERMAL ANALYSIS Russian patent published in 2018 - IPC G01N25/02 G01N25/58 G01N27/14 G01N33/44 

FIELD: measurement technology.

SUBSTANCE: invention relates to the field of thermal methods of polymers analysis and can be used to analyze the electrical conductivity of polymers from the conditions of its heating. This method for the thermal analysis of polymers is described, which includes heating the initial sample of the polymer in an inert medium, determining and analyzing its properties through structural changes in the polymer. According to the claimed method, a preliminary thermal treatment of the initial polymer sample is carried out at a temperature lying in the low temperature range, starting from 25 °C to the temperature of the thermal destruction of the polymer sample, and held for up to 30 minutes at this temperature. A previously thermally treated polymer sample is transferred to an electrically conductive state by carbonizing it to 900 °C, cooled to 25 °C, the conductivity of the carbonized polymer sample is determined. Similar actions are carried out on the following sample of the original polymer for other temperatures of preliminary heat treatment from the low-temperature interval in increments of 5 °C, a scheme is plotted of the specific electrical conductivity of the carbonized polymer samples from the temperature of the preliminary heat treatment from the low temperature interval, and the nature of the dependence of the specific electrical conductivity of carbonized polymer samples on the temperature of the preliminary heat treatment in the low-temperature range, a predetermined conductivity of the carbonized polymer is judged.

EFFECT: increasing the determining accuracy of the specific electrical conductivity of polymers by detecting structural changes in them during heating in the low-temperature range.

1 cl, 4 dwg, 4 ex