Gnatowski Adam, Gołębski Rafał, Stachowiak Krystian, Petrů Jana, Měsíček Jakub
Department of Technology and Automation, Czestochowa University of Technology, 42-200 Czestochowa, Poland.
Department of Machining, Assembly and Engineering Metrology, Technical University of Ostrava, 70800 Ostrava, Czech Republic.
Polymers (Basel). 2024 Sep 27;16(19):2742. doi: 10.3390/polym16192742.
The paper presents an analysis of the filler's effect on the machining process and on changes in the thermomechanical properties of polymer composites based on aluminum chips. Composite research samples with a polymer matrix in the form of polyamide 6 were made by the pressing method. Comparative studies were carried out on the changes in thermomechanical properties and structure of the obtained molders with different filler contents and different fractions after the machining process. In order to determine the changes in thermal and mechanical properties, analysis was carried out using the differential scanning calorimetry (DSC) method, thermal analysis of dynamic mechanical properties (DMTA) and a detailed stereometric analysis of the surface. After mechanical processing, roughness amplitude parameters and volumetric functional parameters were determined. In order to analyze the structure, tomographic examinations of the manufactured composite were conducted. In relation to the polymer matrix, a significant increase in the storage modulus of the composites was noted in the entire temperature range of the study. An increase in the enthalpy of melting of the matrix was noted in composites with a lower filler content and a shift in the melting range of the crystalline phase. Significant differences were noted in the study of the composite surfaces in the case of using fillers obtained after machining with different fractions. The dependencies of the functional and amplitude parameters of the surfaces after machining of composite samples prove the change in the functional properties of the surface. The use of aluminum chips in the composite significantly changed the surface geometry.
本文对填料对基于铝屑的聚合物复合材料加工过程及热机械性能变化的影响进行了分析。采用压制法制备了以聚酰胺6为聚合物基体的复合材料研究样品。对加工过程后不同填料含量和不同粒径的成型件的热机械性能和结构变化进行了对比研究。为了确定热性能和机械性能的变化，使用差示扫描量热法（DSC）、动态机械性能热分析（DMTA）以及对表面进行详细的立体测量分析。机械加工后，测定了粗糙度幅度参数和体积功能参数。为了分析结构，对制造的复合材料进行了断层扫描检查。相对于聚合物基体，在整个研究温度范围内，复合材料的储能模量显著增加。在填料含量较低的复合材料中，基体的熔化焓增加，并且结晶相的熔化范围发生了偏移。在使用不同粒径加工后获得的填料的情况下，对复合材料表面的研究发现了显著差异。复合材料样品加工后表面功能参数和幅度参数的相关性证明了表面功能特性的变化。在复合材料中使用铝屑显著改变了表面几何形状。
