Gnatowski Adam, Gołębski Rafał, Petru Jana, Pagac Marek
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). 2022 Aug 26;14(17):3501. doi: 10.3390/polym14173501.
Nowadays, the dynamic development of the entire market of composite materials is noticeable, which is very often associated with the need to use waste or recycled materials in their production. In the process of producing composites themselves, the easy possibility of shaping their mechanical and thermomechanical properties becomes apparent, which can be a big problem for materials with a homogeneous structure. For the tests, samples made of a combination of acrylic-phenolic resin with fine aluminum and brass chips were used. The tests were performed for composite samples produced by pressing. This paper presents the results of the DMTA method of the conservative modulus and the tangent of mechanical loss angle of the composite, a detailed stereometric analysis of the surface after machining, roughness parameters and volumetric functional parameters were performed. For the tested samples, changes in the values of the conservative modulus and the mechanical loss coefficient were recorded, which indicated significant differences for the composite with brass chips in relation to composites with aluminum chips. In the case of the composite with aluminum chips, slight changes in the conservative modulus were recorded in the glass transition phase and the elastic deformation phase at different frequencies. In contrast, for composites with brass, slight changes were recorded in the entire range of the course of the conservative module as a function of temperature when different excitation frequencies were applied. In relation to the polymer matrix, a significant increase in the value of the conservative modulus of composites was recorded in the entire temperature range of the test. Significant differences were recorded in the study of the surface of composites in the case of using different materials obtained after machining as fillers. The dependences of the amplitude parameters of the surface after machining the sample made of phenolic-acrylic resin prove the poor performance properties of the surface. The use of chips in the composite significantly changed the surface geometry.
如今，整个复合材料市场的动态发展十分显著，这常常与在生产过程中使用废料或回收材料的需求相关联。在复合材料自身的生产过程中，塑造其机械和热机械性能的简便可能性变得明显，而这对于具有均匀结构的材料而言可能是个大问题。在测试中，使用了由丙烯酸 - 酚醛树脂与细铝屑和黄铜屑组合制成的样品。测试针对通过压制生产的复合材料样品进行。本文呈现了复合材料的储能模量和力学损耗角正切的动态热机械分析（DMTA）方法的结果，对加工后的表面进行了详细的立体分析、粗糙度参数和体积功能参数的测定。对于测试样品，记录了储能模量和力学损耗系数值的变化，这表明含黄铜屑的复合材料与含铝屑的复合材料相比存在显著差异。在含铝屑的复合材料中，在不同频率下的玻璃化转变阶段和弹性变形阶段记录到储能模量有轻微变化。相比之下，对于含黄铜的复合材料，当施加不同激励频率时，在储能模量随温度变化的整个过程中都记录到了轻微变化。相对于聚合物基体，在测试的整个温度范围内，复合材料的储能模量值显著增加。在使用加工后获得的不同材料作为填料的情况下，对复合材料表面的研究记录到了显著差异。对酚醛 - 丙烯酸树脂制成的样品进行加工后表面的幅度参数依赖性证明了表面的性能较差。在复合材料中使用碎屑显著改变了表面几何形状。
