摘要
采用研制的压力-体积-温度(PVT)-超声波同步检测装置,表征了高密度聚乙烯的超声波传递特性和比容。实验表明,检测超声波信号的衰减系数和声速能够连续分析高密度聚乙烯(HDPE)的熔融过程、熔点和固熔两态PVT。进一步,对声速和比容实验数据直接拟合及分析得出三组定量二者关系的方程(组),均能很好地描述声速和比容之间的函数关系,这为在线检测提供了理论依据,可分析压力对材料热学性能、绝热压缩性的影响。
One simultaneous test equipment of pressure-volume-temperature （PVT） and ultrasonic wave was used to quantifying wave transmission and specific capability. Experimental results show that ultrasonic velocity and a^tenuation coefficient can be used to characterize melting and PVT at solid state and meh state continuously. Three sets of functions of uhrasonic velocity and specific capability were established from fitting data and theoretic analysis. They are good at describing their relationships such as the effects of pressure on thermodynamics, adiabatic compressiblity and differentializing materials, which are the basics for the on-line inspection.
出处
《高分子材料科学与工程》
EI
CAS
CSCD
北大核心
2012年第11期121-124,共4页
Polymer Materials Science & Engineering
基金
国家自然科学基金资助项目(51073021)
教育部新世纪优秀人才和北京市优秀人才课题
