ISO 11443:2005 塑料 用毛细管和狭缝流变仪测定塑料的流动性
标准编号：ISO 11443:2005
中文名称：塑料 用毛细管和狭缝流变仪测定塑料的流动性
英文名称：Plastics — Determination of the fluidity of plastics using capillary and slit-die rheometers
发布日期：2005-03
标准范围
ISO 11443:2005规定了测定在接近塑料加工中产生的速率和温度下经受剪切应力的塑料熔体的流动性的方法。根据这些方法测试塑料熔体是必要的，因为塑料熔体的流动性通常不仅取决于温度，还取决于其他参数，特别是剪切速率和剪切应力。根据压力和/或力传感器的测量范围以及流变仪的机械和物理特性，本国际标准中描述的方法可用于测定10Pa·s至107Pa·s的熔体粘度。挤出流变仪中出现的剪切速率范围为1s-1至106s-1。模头入口处的伸长效应导致挤出物在模头出口处溶胀。还包括用于评估挤出物溶胀的方法。所描述的流变技术不限于仅表征壁粘附热塑性塑料熔体:例如，可以包括表现出“滑动”效应的热塑性塑料和热固性塑料。然而，用于确定剪切速率和剪切粘度的方法对于不粘壁的材料是无效的。然而，该标准可用于表征给定几何形状的此类流体的流变行为。
ISO 11443:2005 specifies methods for determining the fluidity of plastics melts subjected to shear stresses at rates and temperatures approximating to those arising in plastics processing. Testing plastics melts in accordance with these methods is necessary since the fluidity of plastics melts is generally not dependent solely on temperature, but also on other parameters, in particular shear rate and shear stress.The methods described in this International Standard are useful for determining melt viscosities from 10 Pa·s to 107 Pa·s, depending on the measurement range of the pressure and/or force transducer and the mechanical and physical characteristics of the rheometer. The shear rates occurring in extrusion rheometers range from 1 s-1 to 106 s-1.Elongational effects at the die entrance cause extrudate swelling at the die exit. Methods for assessing extrudate swelling have also been included.The rheological techniques described are not limited to the characterization of wall-adhering thermoplastics melts only: for example, thermoplastics exhibiting 'slip' effects and thermosetting plastics can be included. However, the methods used for determining the shear rate and shear viscosity are invalid for materials which are not wall-adhering. Nevertheless, the standard can be used to characterize the rheological behaviour of such fluids for a given geometry.
标准预览图
