研究目的
Investigating the nonisothermal crystallization behavior of graphene filled poly(ether ether ketone) (PEEK) nanocomposites prepared by different methods (ball milling and solution dispersed) and their effects on the crystallization kinetics and properties of the nanocomposites.
研究成果
The study demonstrated that the method of dispersing graphene into the PEEK matrix significantly affects the nonisothermal crystallization process. Mo's method was found to be the most appropriate model for describing the crystallization behavior. The addition of graphene decreased the crystallinity of PEEK but increased the nucleation activity. The dispersion method influenced the crystallization mechanisms, with the solution dispersed method showing better dispersion effects at lower graphene contents.
研究不足
The study focuses on the nonisothermal crystallization behavior and does not explore the mechanical or thermal properties of the nanocomposites in detail. The effects of graphene dispersion methods on other properties of PEEK/GE nanocomposites are not fully investigated.
1：Experimental Design and Method Selection:
The study utilized differential scanning calorimetry (DSC) to investigate the nonisothermal crystallization behavior of PEEK/GE nanocomposites. Jeziorny and Mo's methods were selected to evaluate the nonisothermal crystallization kinetics.
2：Sample Selection and Data Sources:
Pure PEEK and PEEK/GE nanocomposites with various graphene contents (0.5, 1, and 2 wt%) were prepared by ball milling and solution dispersed methods.
3：5, 1, and 2 wt%) were prepared by ball milling and solution dispersed methods.
List of Experimental Equipment and Materials:
3. List of Experimental Equipment and Materials: DSC (Netzsch, Germany), Haake Rheometer twin screw extruder, JEM-2010HR transmission electron microscope (TEM, JEOL Ltd., Japan).
4：Experimental Procedures and Operational Workflow:
Samples were heated from 30°C to 390°C at a rate of 10°C/min, held for 5 minutes, then cooled to 30°C at various cooling rates (5, 10, 15, 20, 25°C/min), and reheated to 390°C at 10°C/min.
5：Data Analysis Methods:
The crystallization kinetics were analyzed using Jeziorny and Mo's methods. The activation energy and nucleation activity were calculated.
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