羟基磷灰石增强聚乙烯的动态力学特性：粒径的影响

Dynamic mechanical characterization of hydroxyapatite reinforced polyethylene: effect of particle size.

作者信息

Nazhat S N, Joseph R, Wang M, Smith R, Tanner K E, Bonfield W

机构信息

IRC in Biomedical Materials, Queen Mary and Westfield College, University of London, Mile End Road, London, E1 4NS, UK.

出版信息

J Mater Sci Mater Med. 2000 Oct;11(10):621-8. doi: 10.1023/a:1008957729512.

DOI:10.1023/a:1008957729512

PMID:15348086

Abstract

Dynamic mechanical analysis (DMA) was used to characterize biomedical composites consisting of synthetic hydroxyapatite (HA) particulate reinforced polyethylene (PE). The effects of the HA volume fraction, temperature and HA particle on the storage modulus (E(I)) and damping (tan delta) were investigated. Increasing HA volume fractions increased E(I) and decreased tan delta. E(I) was found to be linearly related to the Young's modulus values obtained from quasi-static tensile tests. Relative modulus and damping studies showed that the viscoelastic behavior of unfilled PE was different to that of the filled matrix due to the presence of thermally induced tensile stresses in the matrix at the filler-matrix interface.

摘要

动态力学分析（DMA）用于表征由合成羟基磷灰石（HA）颗粒增强聚乙烯（PE）组成的生物医学复合材料。研究了HA体积分数、温度和HA颗粒对储能模量（E(I)）和阻尼（tanδ）的影响。增加HA体积分数会提高E(I)并降低tanδ。发现E(I)与通过准静态拉伸试验获得的杨氏模量值呈线性关系。相对模量和阻尼研究表明，由于在填料-基体界面处基体中存在热致拉应力，未填充PE的粘弹性行为与填充基体的不同。