摘要
采用毛细管流变仪、旋转流变仪等仪器，对4种不同相对分子质量的聚丙烯无纺布专用树脂流变性能进行了研究。结果表明，随温度的升高，各试样的剪切黏度（ηa）和剪切应力（τ）下降；在250℃，剪切速率（γ）为200～10000s^-1的条件下，各试样ηa和τ的差距逐渐缩小，流变曲线趋于重合。在250℃时，各试样的非牛顿流体指数接近于1，即此时试样接近于牛顿流体。在温度为230屯，γ为10^-2 - 1s^-1的条件下。各试样零切黏度大小依下列顺序递减：试样2，试样1，试样3，试样4。
The theological properties of four kinds of polypropylene （PP） non - woven fabrics special resin with different relative molecular mass were studied with capillary rheometer and rotational rheometer. The results showed that the apparent shear viscosity （ ηa ） and shear stress（τ） of all samples decreased with temperature increasing. Under the condition of 250 ℃,and shear rate （γ）from 200 to 10 000 s^-1, the differences of ηa and τ for each samples were gradually reduced, and the rheological curves tended to overlap. The non - Newtonian index for all samples closed to 1 at 250 ℃, it implied that the samples were on the verge of Newtonian fluid. At 230 ℃ ,γ from 10^-2 to 1 s^-1 ,zero shear viscosity sampl of the samples decreased in following order： sample 2, sample 1, sample 3, sample 4.
出处
《石化技术与应用》
CAS
2009年第6期518-522,共5页
Petrochemical Technology & Application
基金
中国石油天然气股份有限公司炼油与化工分公司资助项目(项目编号:0704A07-08)
关键词
无纺布
聚丙烯
流变性能
剪切黏度
剪切应力
剪切速率
non - woven fabrics
polypropylene
rheological property
shear viscosity
shear stress
shear rate
