压力对PET/PA6共聚物流变行为的影响  

Effect of Pressure on Rheological Behavior of PET/PA6 Copolymer

作　　者：郭增革[1,2] 李健[2] 程博闻[1] 张斌[1,2] 唐兵兵[1,2] 李鑫[2] 

机构地区：[1]天津工业大学纺织学部中空纤维膜材料与膜过程省部共建国家重点实验室,天津300387 [2]中国纺织科学研究院生物源纤维制造技术国家重点实验室,北京100025

出　　处：《高分子材料科学与工程》2014年第1期53-57,共5页Polymer Materials Science & Engineering

基　　金：国家"十二五"科技支撑计划资助项目(2011BAE05B00)

摘　　要：利用毛细管流变仪及反向压力腔组件在毛细管出口压力高于常压条件下,对聚对苯二甲酸乙二醇酯/尼龙6(PET/PA6)共聚物熔体的流变行为进行了研究。结果表明,在恒定剪切速率下,随着毛细管内平均压力(pm)的增大,剪切黏度逐渐增大,在实验温度为300℃和剪切速率为108 s-1时,剪切黏度从10 MPa的130 Pa·s增到大50 MPa的215Pa·s;随着剪切速率的增大或温度的升高,pm对剪切黏度的影响均逐渐减小;同时压力系数随着剪切速率的增大和温度的升高而呈下降趋势。The rheological behavior of polyethylene terephthalate/polyamides 6（PET/PA6） copolymer melt was investigated through the capillary rheometer and counter pressure chamber when the pressure at the outlet of capillary was higher than normal pressure. The results show that when the shear rate is a fixed constant, the shear viscosity of copolymer increases with the increase of average capillary pressure, and the shear viscosity increases from 130 Pa＇s to 215 Pa＇s along with Pm increasing from 10MPa to 50 MPa while the temperature is 300 ℃; and the shear rate is 108 s-1. It is found that effect of the average capillary pressure on the shear rate decreases with the increase of the shear rate or the temperature; the pressure coefficient shows a downward trend with the increase of the shear rate and the temperature.

关 键 词：聚对苯二甲酸乙二醇酯 尼龙6 共聚物 压力 剪切黏度 剪切速率 

分 类 号：O631.21[理学—高分子化学]