材料科学与工程学报2025，Vol.43Issue(4)：550-557,8.DOI:10.14136/j.cnki.issn1673-2812.2025.04.006
不同密度聚氯乙烯基木塑复合材料紫外加速老化性能
Ultraviolet Accelerated Aging Properties of PVC-based Wood-plastic Composites with Different Densities
摘要
Abstract
In order to investigate the impact of density on the aging performance of wood-plastic composites(WPCs),PVC-based foamed WPCs with three different densities of 0.62,0.75 and 0.82 g·cm-3 were prepared through extrusion molding.Accelerated aging using UV radiation was employed to study the effects of accelerated aging on the color,mass loss,and mechanical properties of PVC-based foamed WPCs with different densities.The surface microstructure of the materials was observed using scanning electron microscopy(SEM).After 180 days of accelerated aging,the surface of WPCs underwent decomposition and discoloration.WPCs with a density of 0.75 g·cm-3 exhibited the best resistance to photo-oxidation and photodegradation,with a color difference of only 6.37.In terms of mass loss,a trend of decreasing mass loss rate with increasing density was observed.Regarding mechanical properties,WPCs with a density of 0.75 g·cm-3 showed the highest retention rates for bending strength(64.86%)and tensile strength(76.93%),indicating the best overall performance among the three densities.SEM analysis revealed severe surface chalking,numerous cracks and voids,and a significant exposure of wood fibers after 180 days of aging.These research findings provide valuable insights for further exploration of the aging behavior of PVC-based foamed WPCs.关键词
复合材料/加速老化/聚氯乙烯/密度/力学性能/材色/微观结构Key words
Composite materials/Accelerated aging/Polyvinyl chloride/Density/Mechanical properties/Wood color/Microstructure分类
通用工业技术引用本文复制引用
吴茂源,方海,霍瑞丽,陈航..不同密度聚氯乙烯基木塑复合材料紫外加速老化性能[J].材料科学与工程学报,2025,43(4):550-557,8.基金项目
国家重点研发计划项目(2019YFD1101205) （2019YFD1101205）
