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首页> 外文期刊>Journal of Applied Polymer Science >Study of rheological property of nylon-1212 with Haake Rheometer
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Study of rheological property of nylon-1212 with Haake Rheometer

机译：Haake流变仪研究尼龙1212的流变性能

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Rheological properties of nylon-1212 have been studied by means of Haake Rheometer. The effect of shear rate and temperature on the apparent vicosity of nylon-1212 was discussed. A correlation of non-Newtonian index with the temperature was obtained. The results showed that the apparent viscosity decreases with the increase of the temperature. With increasing shear rate, shear thinning of nylon-1212 was observed clearly. From the relation of the temperature dependence of the polymer, we obtained the viscous flow activation energy. We conclude that the apparent viscosity is sensitive to temperature at lower shear stress because of higher viscous flow activation energy, and the temperature affect on the apparent viscosity becomes weaker at higher shear stress because of lower viscous flow activation energy. We have investigated the creep and elastic recovery of nylon-1212. A creep test was carried out to define the linear viscoelastic range as 1.0 and 5.0 Pa for 195 and 190degreesC nylon-1212 melts, respectively. A time-dependent response was found for the creep and recovery phases at a lower applied shear stress. However, at higher shear stress, the creep and recovery phases were time-independent. (C) 2003 Wiley Periodicals, Inc. [References: 28]
机译：已经通过Haake流变仪研究了尼龙-1212的流变性质。讨论了剪切速率和温度对尼龙1212表观粘度的影响。获得了非牛顿指数与温度的相关性。结果表明，表观粘度随温度的升高而降低。随着剪切速率的增加，可以清楚地观察到尼龙1212的剪切稀化。从聚合物的温度依赖性的关系，我们获得了粘性流动活化能。我们得出结论，表观粘度在较低剪切应力下对温度敏感，这是因为较高的粘性流动活化能，而温度对表观粘度的影响在较高剪切应力下由于较低的粘性流动活化能而变得较弱。我们已经研究了尼龙1212的蠕变和弹性回复率。进行蠕变测试以将线性粘弹性范围定义为195和190°C尼龙1212熔体的1.0和5.0 Pa。在较低的剪切应力下，蠕变和恢复阶段发现了随时间变化的响应。但是，在较高的剪切应力下，蠕变和恢复阶段与时间无关。 （C）2003 Wiley Periodicals，Inc. [参考：28]

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