短玻纤和SiO_2颗粒增强PA66/UHMWPE复合材料的力学性能

MECHANICAL PROPERTIES OF SHORT GLASS FIBER AND SILICON DIOXIDE POWDER REINFORCED PA66/UHMWPE COMPOSITES

制备了PA66/UHMWPE/HDPE g MAH共混合金, 并对其力学性能和微观结构进行了研究。结果表明: 随着UHMWPE含量的增加, 共混合金缺口冲击强度显著提高, 拉伸强度、拉伸模量、弯曲强度和弯曲模量下降。为了弥补强度和刚性的损失, 使材料同时具有良好的韧性、强度和刚性, 采用了短玻璃纤维和无机粒子混杂增强PA66/UHMWPE/HDPE g MAH(80/20/20)。经短玻纤和无机粒子混杂增强后, 材料的拉伸强度、弯曲强度、模量和刚性都明显提高, 同时材料缺口冲击强度保持较高水平, 比尼龙66提高72 9%。

The microstructure and mechanical properties were studied for polyamide 66(PA66)/ultra high molecular weight polyethylene (UHMWPE) blends compatibilized by maleic anhydride high density polyethylene (HDPE-g-MAH). The results indicate that the notched izod impact strength increases obviously with the increase of content of UHMWPE at the expense of tensile/flexural strength and modulus. In order to improve the strength and stiffness of UHMWPE toughening polyamide 66, short glass fiber (SGF) and inorganic particles were employed to reinforce PA66/UHMWPE/HDPE-g-MAH (80/20/20). It is found that the tensile/flexural strength and tensile/flexural modulus are improved substantially, meanwhile the high notched izod impact strength is maintained, about 72.9% higher than that of PA66.