摘要
采用毛细管流变仪研究了高黏度聚酯(PET)的表观黏度及黏流活化能随温度(280～300℃)及剪切速率(20～104s-1)的变化。结果表明:高黏度PET熔体随着剪切速率的增加出现切力变稀现象,随着熔体温度升高,剪切速率对熔体的表观黏度的影响降低;高黏度PET的黏流活化能随着剪切速率的提高而降低;在温度为300℃,剪切速率为3 000 s-1时,高黏度PET熔体具有较好的流动性。
The change of the apparent viscosity and viscous flow activation energy of high-viscosity polyester（PET） with the temperature （280 -300 ℃ ） and shear rate （20 -104 s-1） was studied with a capillary rheometer. The results showed that the high-viscosity PET melt exhibited a shear thinning behavior while increasing the shear rate; the shear rate had a lower effect on the apparent viscosity of the melt while elevating the melt temperature ; the viscous flow activation energy was decreased with the increase of shear rate; and the high-viscosity PET melt exhibited favorable fluidity at 300 ~C and shear rate 3 000 s-1
出处
《合成纤维工业》
CAS
北大核心
2013年第1期17-19,共3页
China Synthetic Fiber Industry
关键词
聚对苯二甲酸乙二酯
高黏度聚酯
流变性
表观黏度
黏流活化能
polyethylene terephthalate
high-viscosity polyester
rheological behavior
apparent viscosity
viscous flow activation energy
