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About This Item
Full Description
1.1 This practice covers the determination of a degradation-end point (a brittle point) for degradable polyethylene/polypropylene films and sheeting less than 1.0 mm (0.04 in.) thick. This practice is not intended for determination of the rate of degree of degradation of a polyethylene/polypropylene film or sheet, but rather, to assess when in the course of its degradation under some condition, a brittle point is reached. If one wishes to monitor tensile elongation during the degradation process (such as when the tensile elongation is significantly greater than 5 %), Test Method D882 is recommended. This practice should not be considered the only way of determining a degradation-end point.
1.2 Tensile properties of plastics 1.0 mm (0.04 in.) or greater in thickness shall be determined in accordance with Test Method D638.
1.3 Use a static weighing-constant rate of grip separation test. This procedure employs a constant rate of separation of the grips holding the sample and a static load cell.
1.4 This procedure has been successful for determining the degradation end point of ethylene-carbon-monoxide copolymers and has screened successfully two other additive-type polyethylenes in a round robin test.
1.5 The values stated in SI units are to be regarded as the standard. The values in parentheses are for information only.
Document History
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ASTM D3826-18
Standard Practice for Determining Degradation End Point in Degradable Polyethylene and Polypropylene Using a Tensile Test- Most Recent
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ASTM D3826-98(2013)
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Standard Practice for Determining Degradation End Point in Degradable Polyethylene and Polypropylene Using a Tensile Test- Historical Version
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ASTM D3826-98(2008)
Standard Practice for Determining Degradation End Point in Degradable Polyethylene and Polypropylene Using a Tensile Test- Historical Version
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ASTM D3826-98(2002)
Standard Practice for Determining Degradation End Point in Degradable Polyethylene and Polypropylene Using a Tensile Test- Historical Version