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Performance of Corrugated Pipe Manufactured with Recycled Polyethylene Content (2011) / Chapter Skim
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Appendix E - Proposed Draft Standard Specification for PCR MCR High-Density PE Bottles for Use in AASHTO-Approved Corrugated Drainage Pipe
Pages 70-76

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From page 70...
... E-1 A P P E N D I X E Proposed Draft Standard Specification for PCR MCR High-Density PE Bottles for Use in AASHTO-Approved Corrugated Drainage Pipe
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From page 71...
... of Plastics by Displacement D1238, Test Method for Melt Flow Rates of Thermoplastics by Extrusion Plastometer D1505, Test Method for Density of Plastics by the Density-Gradient Technique D4218, Test Method for Determination of Carbon Black Content in Polyethylene Compounds By the Muffle-Furnace Technique D4703, Practice for Compression Molding Thermoplastic Materials into Test Specimens, Plaques, or Sheets D5630, Test Method for Ash Content in Plastics ______________________________________________________________________ 3. TERMINOLOGY 3.1 Post-Consumer Recycled HDPE (PCR-HDPE)
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From page 72...
... Required properties for PCR mixed-color reprocessed resin. Property Test Method Sample Specified Value Frequency Density ASTM D1505 ASTM D792 Pellets/Plaque 0.945-0.960 g/cm 1 per shif t Melt Index ASTM D1238 190°C/2.16 Kg Pellets/Plaque <0.60 g/10 min 1 per shift % Volatiles 175°C/1 Hour Pellet s a <0.2 % Certif y b % Ash ASTM D5603 Pellets/Plaque <1.5 % 1 per shift % PP DSC Plaque <10.0 % 1 per lot c Yield Stress (psi)
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From page 73...
... ______________________________________________________________________ 7. TEST METHODS 7.1 Test Conditions – Unless otherwise specified in the test methods or in this specification, conduct tests at the standard laboratory temperature of 23 2°C (73.4 3.6°F)
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From page 74...
... 7.6.3 Integrate the curve from a flat point before the PP melting to a point where the PP curve returns to baseline.
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From page 75...
... 7.6.5 Record the HDPE end-of-melt temperature and the PP heat of fusion in J/g. 7.6.6 Calculate the theoretical heat of fusion for 100% polypropylene for the portion of the PP melting curve that does not overlap with HDPE by: -4 -3 -2 -1 0 H ea t F lo w (W /g)
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From page 76...
... For H f sample = 2.57 J/g, %PP = 3.4 % 7.6.8 Test two specimens from different parts of the molded plaque and report the average. 7.7 Yield Stress/Break Strain – Test ASTM Method D638, with Type IV dumbbell, 2- in./min crosshead speed.
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Key Terms

  • recycled hdpe
  • required properties
  • method astm
  • hdpe containing
  • dsc curve

  • break strain
  • standard laboratory
  • lot sample
  • hdpe melt
  • reprocessed resin

  • melt index
  • melting curve
  • manufacturing quality
  • pellet samples
  • gage length

  • compression molded
  • separate determinations
  • sample preparation
  • laboratory extruder
  • tensile properties

  • methods astm
  • primarily bottles
  • weight loss
  • index astm
  • percentage weight

  • flow rates
  • laboratory conditions
  • include primarily
  • melt returns
  • pipe manufacturers


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