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<p>This document specifies a method for determining the drawing and break characteristics of molten plastics. The method involves the measurement of the force generated in deforming a molten filament under defined extrusion temperature and drawing conditions.</p>
<p>Data is generated under non-isothermal and non-homogeneous deformation conditions. However, it is useful for the interpretation of polymer behaviour in extensional flow.</p>
<p>The method is suitable for thermoplastics moulding and extrusion materials that can be extruded using a capillary extrusion rheometer, or an extruder with capillary rod die or other extrusion devices and have sufficient melt strength to be handled without difficulty.</p>
<p>The method is applicable to chemically stable materials that produce a uniform extrudate free from heterogeneities, bubbles, unmelted impurities, etc.</p>
<p>This method can provide information on</p>
<p>— processability for all extrusion techniques,</p>
<p>— the effect of mechanical and thermal history, and</p>
<p>— the effect of chemical structure, such as branching, entanglements and molecular mass.</p>
<p>This technique is one of a number of techniques that can be used to measure the extensional flow behaviour of a material. This method of measurement does not necessarily reproduce the drawing conditions to which thermoplastics are subjected to during their processing.</p>
Reģistrācijas numurs (WIID)
80004
Darbības sfēra
<p>This document specifies a method for determining the drawing and break characteristics of molten plastics. The method involves the measurement of the force generated in deforming a molten filament under defined extrusion temperature and drawing conditions.</p>
<p>Data is generated under non-isothermal and non-homogeneous deformation conditions. However, it is useful for the interpretation of polymer behaviour in extensional flow.</p>
<p>The method is suitable for thermoplastics moulding and extrusion materials that can be extruded using a capillary extrusion rheometer, or an extruder with capillary rod die or other extrusion devices and have sufficient melt strength to be handled without difficulty.</p>
<p>The method is applicable to chemically stable materials that produce a uniform extrudate free from heterogeneities, bubbles, unmelted impurities, etc.</p>
<p>This method can provide information on</p>
<p>— processability for all extrusion techniques,</p>
<p>— the effect of mechanical and thermal history, and</p>
<p>— the effect of chemical structure, such as branching, entanglements and molecular mass.</p>
<p>This technique is one of a number of techniques that can be used to measure the extensional flow behaviour of a material. This method of measurement does not necessarily reproduce the drawing conditions to which thermoplastics are subjected to during their processing.</p>
