Świetlicki Michał, Chocyk Dariusz, Klepka Tomasz, Prószyński Adam, Kwaśniewska Anita, Borc Jarosław, Gładyszewski Grzegorz
Department of Applied Physics, Lublin University of Technology, ul. Nadbystrzycka 38, 20-618 Lublin, Poland.
Department of Polymer Processing, Lublin University of Technology, ul. Nadbystrzycka 36, 20-618 Lublin, Poland.
Materials (Basel). 2020 Feb 4;13(3):698. doi: 10.3390/ma13030698.
In the presented work the influence of different 3MgO·4SiO·HO (talc) contents in polypropylene samples on the structure, hardness, elasticity, and friction of the surface layer was investigated. The talc content ranged from 0 to 25 wt.%, and all the samples were obtained in the same conditions by the injection molding process. The analysis of the microstructure was performed by X-ray diffraction. Changes in the hardness and elasticity were determined for three different depths (300, 800, and 4000 nm) using an ultra nano tester. For the purpose of the examination of the friction properties of the obtained compounds, a nano-scratch tester was applied. Increasing the talc content caused growth in the indentation modulus and hardness values. Simultaneously, an effect of decreasing hardness and elastic modulus with increasing indentation depth was observed. The smallest effect size was observed for 25 wt.% talc content, which might suggest that talc addition increased the homogeneity of the observed composites. Scratch tests showed increasing scratch resistance along with increasing talc content for both constant and progressive loads. The growth in talc concentration led to a decrease in the degree of the polypropylene (PP) crystallinity of the surface layer. The exfoliation process occurred in PP composites.
在本研究中，研究了聚丙烯样品中不同含量的3MgO·4SiO·H₂O（滑石粉）对表层结构、硬度、弹性和摩擦的影响。滑石粉含量范围为0至25 wt.%，所有样品均通过注塑工艺在相同条件下制备。通过X射线衍射对微观结构进行分析。使用超纳米测试仪测定了三种不同深度（300、800和4000 nm）处的硬度和弹性变化。为了检测所得化合物的摩擦性能，使用了纳米划痕测试仪。滑石粉含量的增加导致压痕模量和硬度值增大。同时，观察到随着压痕深度增加，硬度和弹性模量减小的效应。在滑石粉含量为25 wt.%时观察到最小的效应量，这可能表明添加滑石粉提高了所观察到的复合材料的均匀性。划痕试验表明，在恒定载荷和渐进载荷下，随着滑石粉含量的增加，耐划痕性增强。滑石粉浓度的增加导致表层聚丙烯（PP）结晶度降低。在PP复合材料中发生了剥离过程。
