【摘要】 以高密度聚乙烯(PE-HD)为基体,以木粉作为填充料,用微型挤出成型设备制备PE-HD基木塑复合材料(WPC),研究高填充木粉质量分数变化对WPC热性能的影响。结果表明,随着木粉含量的增加,WPC的尺寸热稳定性得到改善,玻璃化转变温度(Tg)相应提高,玻璃化转变台阶高度减小;当木粉质量分数为60%～70%、温度低于Tg时,WPC的尺寸热稳定性较好,并趋于恒定,有利于其保持力学性能。更多还原

【Abstract】 Wood plastic composites(WPC) were prepared by mini extrusion equipment with PE-HD as plastic matrix and wood flour as filler.The effects of highly filled wood flour mass fraction on the thermal properties of WPC were studied.The results show that the dimension thermal stability of WPC is improved with increasing the wood flour mass fraction.The glass transition temperatures(Tg) of WPC increase and the glass transition step height of WPS decrease with increasing the wood flour mass fraction.The dimension thermal stability of WPC under Tg is good and tend to a constant when the wood flour mass fractions are 60%~70%,which is benefit to maintaining the mechanical properties of WPC.更多还原