Study of the Effect of Processing Cycles on the Thermophysical Properties of Polyether Ether Ketone

Abstract

The effect of heating cycles of polyether ether ketone up to 420 °C on the thermophysical properties was studied by the method of differential-scanning calorimetry. It is shown that with each subsequent heating the glass transition temperature increases, while the melting and crystallization temperature decreases, which may indicate an increase in the molecular weight of the polymer due to the structuring processes. The main degradation products of polyether ether ketone in air at temperatures of 350-450 °C were determined by gas chromatography and thermal decomposition schemes were proposed.

Synthesis and Research of Properties of Polyether Ether Ketone

“…Analysis of the literature suggests that the PEEK polycondensation is most often carried out in a medium of high-boiling solvent -diphenyl sulfone (DPS), which is due to the possibility of obtaining high-molecular PEEK powder and the relative simplicity of the purification stage from this solvent [7][8][9][10]. Earlier, we studied the synthesis of PEEK and copolymers based on it in a diphenyl sulfone medium and studied the dependence of thermal and mechanical properties on the molecular weight [11][12][13][14][15]. Optimized the method of PEEK synthesis, which has a complex of physicochemical properties necessary for use in additive technologies [16].…”