CH2, mol.wt.=14
Cristalinity
        Low Linear: 60%
        High Density: up to 95%

Pyrolysis: melts and becomes transparent; in the absence of air is stable up to 300 deg. C.
                  Cross-linked types do not melt.

Specific gravity: Low density 0.915 to 0.94
                  High density 0.94 to 0.97

Refractive index: 1.51 to 1.52

Moisture relations: being paraffins, polyethylenes are resistant to water; increase in weight
                    after 1 year less than 0.2%.

Thermal properties

Specific heat 0.55 at 20 deg. C, rising to 0.7 at 120 deg. C.
Coeficient of linear expansion: 0.00017 to 0.00022 for low density
                                0.00013 to 0.00020 for high density
Melting point(loss of cristalinity): 109 to 125 deg. C for low density
                                     130 to 135 deg. C for high density

Electrical properties
Resistivity 1017 to 1019  (ohm cm)
Dielectric strength 20 to 160 (kV/mm)
Dielectric constant 2.28

Mechanical properties
Elastic modulus 15.4 to 125.0 (daN/mm2)

Strain rate(mm/min)                          50           500
Yield strength(daN/mm2)                      2.28        2.36
Ultimate tensile strength(daN/mm2)           3.43        1.33

Hardness: low density, 50-60
          high density, 65-70
Impact:   low density, 0.92
          high density, 0.96