Common test methods for insulating and sheathing materials of electric and optical cables. Part 4-1. Methods specific to polyethylene and polypropylene compounds. Resistance to environmental stress cracking. Measurement of the melt flow index. Carbon black and/or mineral filler content measurement in polyethylene by direct combustion. Measurement of carbon black content by thermogravimetric analysis (TGA). Assessment of carbon black dispersion in polyethylene using a microscope
State system for ensuring the uniformity of measurements. Measurements of liquids and gases flow rate and quantity by means of orifice instruments. Part 1. Principle of the method of measurements and general requirements
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