标准编号：ISO 11443:2014
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：2014-04
标准范围
This International Standard specifies methods for determining the fluidity of plastics melts subjectedto 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 meltsis generally not dependent solely on temperature, but also on other parameters, in particular shear rateand shear stress.The methods described in this International Standard are useful for determining melt viscosities from10 Pa?s to 107 Pa?s, depending on the measurement range of the pressure and/or force transducer andthe mechanical and physical characteristics of the rheometer. The shear rates occurring in extrusionrheometers range from 1 s?1 to 106 s?1.Elongational effects at the die entrance cause extrudate swelling at the die exit. Methods for assessingextrudate swelling have also been included.The rheological techniques described are not limited to the characterization of wall-adheringthermoplastics melts only; for example, thermoplastics exhibiting “slip” effects[1][2] and thermosettingplastics can be included. However, the methods used for determining the shear rate and shear viscosityare invalid for materials which are not wall-adhering. Nevertheless, this International Standard can beused to characterize the rheological behaviour of such fluids for a given geometry.
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