IS 13360 : Part 4 : Sec 4 : 1999 Plastics - Methods of Testing - Part 4 : Rheological Properties - Section 4 : Determination of Properties of Polymeric Materials by Means of a Capillary Rheometer

1. Scope

1.1 This standard (Part 4/Section 4) covers measurement of the rheological properties of polymeric materials at various temperatures and shear ratescommon to processing equipment. It covers measurement of melt viscosity, sensitivity, or stabilityof melt viscosity with respect to temperature and polymer dwell time in the rheometer, die swell ratio (polymer memory), and shear sensitivity when extruding under constant rate or stress. The techniques described permit the characterization of materials that exhibit both stable and unstable melt viscosity properties.

1.2 The test method prescribed in this standard has been found useful for quality control tests on both reinforced and unreinforced thermoplastics, cure cycles of thermosetting materials, and other polymeric materials having a wide range of melt viscosities.