摘要
利用高压釜对热塑性聚氨酯(TPU)进行发泡,考察了发泡温度、泄压速率、熔体流动性对泡孔结构、发泡倍率的影响。结果表明,TPU在发泡温度185和195℃下,均可得到泡孔结构;泡孔平均直径随着泄压速率的增大而减小;两种发泡温度下的泡孔密度随着泄压速率的增大,具有不同的趋势;最大发泡倍率出现在发泡温度195℃、泄压速率1. 72 MPa/s的条件下。
Thermoplastic polyurethane( TPU) was foamed in autoclave. The effects of foaming temperature,pressure release rate and melt fluidity on cell structure and foaming ratios were investigated. The results show that TPU can obtain the cell structure at 185 and195 ℃. The average diameter of the cell decreases with the increase of the pressure relief rate. The cell density at the two foaming temperatures has different trends with the increase of the pressure relief rate. The maximum foaming rate is 195 ℃ and the pressure relief rate is 1. 72 MPa/s.
作者
路宏伟
王建康
LU Hong-wei;WANG Jian-kang(Tianjin Key Laboratory of Integrated Design and On-line Monitoring for Light Industry&Food Machinery and Equipment,College of Mechanical Engineering,Tianjin University Science and Technology,Tianjin 300222,China;Tianjin Polymorphic Hybrid Machinery Equipment Co.,Ltd.,Tianjin 300222,China)
出处
《塑料工业》
CAS
CSCD
北大核心
2020年第5期49-52,149,共5页
China Plastics Industry
关键词
超临界二氧化碳
高压釜
热塑性聚氨酯
发泡
Supercritical Carbon Dioxide
Autoclave
Thermoplastic Polyurethane
Foaming
