The investigation of low melt fl ow index polyetheretherketone crystallization kinetics in isothermal mode

Abstract

The crystallization kinetics of low melt fl ow index polyetheretherketone has been investigated. The purpose of the work was obtaining the parameters of the crystallization kinetics, which allow infl uencing the properties of the products obtained during the processing of polyetheretherketone into thick-walled products.The considered material was PEEK-5G grade polyetheretherketone with low melt fl ow index. The study of the process was carried out by the method of diff erential scanning calorimetry in isothermal mode.The processing of experimental data was performed using Kolmogoff-Avrami equation, the activation energy of the process – using Kissinger one.The parameters of the process were calculated: the nucleation and growth rates of crystalline structures, the activation energy of the process. The temperature range for the crystallization of polyetheretherketone in the technological process of obtaining thickwalled products has been established.