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首页> 外文期刊>Journal of Applied Polymer Science >Processing, tensile, and fracture properties of injection molded Hdpe-Al2O3-HAp hybrid composites
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Processing, tensile, and fracture properties of injection molded Hdpe-Al2O3-HAp hybrid composites

机译：注塑Hdpe-Al2O3-HAp杂化复合材料的加工，拉伸和断裂性能

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摘要

The aim of this study is to characterize the physical and mechanical properties of HDPE-alumina-HAp composites prepared by injection molding techniques and to demonstrate their superiority over unreinforced HDPE. Composites with up to 30 vol. % of filler, composed of equal volumes of HAp and alumina, were successfully processed by injection molding. On the basis of the analysis of processing results, i.e., melt viscosity, volume flow rate, shear rate, mixing torque, the critical ceramic loading was determined. Tensile tests done at varying crosshead speeds confirm that an increase in ceramic loading results in an increase in strength, as well as a simultaneous decrease in the total elongation at failure. A maximum strength of 20 MPa and a maximum tensile modulus of around 1 GPa was achieved with 30 vol % ceramic loading in semicrystalline HDPE matrix. SEVNB test results demonstrate an improvement in toughness at 20 vol %. The fracture properties are discussed in terms of interfacial bonding between ceramic fillers and the semicrystalline HDPE matrix.
机译：这项研究的目的是表征通过注模技术制备的HDPE-氧化铝-HAp复合材料的物理和机械性能，并证明它们优于未增强的HDPE。最高30卷的复合材料由等体积的HAp和氧化铝组成的％的填料已通过注塑成功加工。在分析加工结果的基础上，即熔体粘度，体积流量，剪切速率，混合扭矩，确定了临界陶瓷载荷。在不同的十字头速度下进行的拉伸试验证实，陶瓷载荷的增加会导致强度的增加，同时断裂总伸长率也会同​​时下降。在半结晶HDPE基体中加入30体积％的陶瓷时，可获得20 MPa的最大强度和大约1 GPa的最大拉伸模量。 SEVNB测试结果表明，韧性提高了20％（体积）。根据陶瓷填料和半结晶HDPE基体之间的界面结合来讨论断裂性能。

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