Medium-density polyethylene

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MDPE
Density 0.926-0.940 g/cm3
Young modulus/ E modulus/ Tensile modulus 172–379 MPa
Tensile strengtht) 12.4–19.3 MPa
Elongation @ break 100–150%
Brittleness, low temperature -118 °C
Vicat 99-124 °C
Specific heat (c) 1.916 kJ/kg.K
Source: J.Brandrup, E. H. Immergut & E.A. Grulke, Polymer Handbook Fourth edition, ISBN 0-471-48171-8

Medium-density polyethylene (MDPE) is a type of polyethylene defined by a density range of 0.926–0.940 g/cm3.[1] It is less dense than HDPE, which is more common.

MDPE can be produced by chromium/silica catalysts, Ziegler-Natta catalysts or metallocene catalysts. MDPE has good shock and drop resistance properties. It also is less notch sensitive than HDPE. Stress cracking resistance is better than that of HDPE. MDPE is typically used in gas pipes and fittings, sacks, shrink film, packaging film, carrier bags, and screw closures.[2]

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