Abstract

In this work, elastic and strength properties of polymer composites with a polytrifluorochloroethylene matrix and expanded graphite (EG) filler have been evaluated using the microindentation method. The influence of the filler dispersion and concentration on the mechanical characteristics of the nanocomposite materials (NCM) has been studied. It has been established that the microhardness of the NCM decreases with increasing the filler concentration. An increase in the filler particles sizes of NCM with a filler concentration of 3 vol.% led to an increase of microhardness and Young's modulus. As for NCM with 10 vol.% of the filler, an increase in the EG particles size up to 180 μm showed a similar change in the mechanical characteristics. However, a further increase in the EGs average particle size caused a decrease in Young's modulus and the microhardness of the nanocomposites. The reason for that might be a different degree of the polymer structuring and the formation of different orientational ordering of the filler nanoparticles.

摘要

在这项工作中，使用显微压痕法评估了具有聚三氟氯乙烯基体和膨胀石墨 (EG) 填料的聚合物复合材料的弹性和强度性能。研究了填料分散和浓度对纳米复合材料 (NCM) 机械特性的影响。已经确定，NCM 的显微硬度随着填料浓度的增加而降低。填料浓度为 3 vol.% 时，NCM 填料粒径的增加导致显微硬度和杨氏模量的增加。对于具有 10 vol.% 填料的 NCM，EG 颗粒尺寸增加至 180 μm 显示出类似的机械特性变化。然而，进一步增加 EG 的平均粒径导致 Young' s 模量和纳米复合材料的显微硬度。其原因可能是不同程度的聚合物结构化和不同方向排列的填料纳米粒子的形成。