eFunda Polymers: Properties of Polyethylene and ethylene copolymers {crosslinked, molding grade}
engineering fundamentals Polymer Material Properties
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Polyethylene and ethylene copolymers		  
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State: crosslinked
Application: molding grade
Material Properties
 Mechanical Properties Conditions
State 1 State 2 ASTM
Elastic Modulus (MPa)   345 - 3450  tensile   D638
  345 - 1035  compressive   D638
Flexural Modulus (MPa)   483 - 2415   23 ºC   D790
Tensile Strength (MPa)   12 - 32 at break   D638
Compressive Strength (MPa)
at yield or break		   14 - 38     D695
Flexural Strength (MPa)
at yield or break		   14 - 45     D790
Elongation at break (%)   10 - 440     D638
Hardness   55 - 80  Shore D   D638
Izod Impact (J/cm of notch)
1/8" thick specimen unless noted		   0.5 - 10.6     D256A

 Thermal Properties Conditions
Pressure State ASTM
Coef of Thermal Expansion (10-6/ºC)  100     D696
Deflection Temperature (ºC)   55 - 108   0.46 MPa   D648
  41 - 63   1.82 MPa   D648

 Physical & Electrical Properties Conditions
State ASTM
Specific Gravity  0.95 - 1.45   D792
Water Absorption (% weight increase)  0.01 - 0.06  after 24 hrs D570
Dielectric Strength (V/mil);
1/8" thick specimen unless noted		   230 - 550   D149

 Processing Properties Conditions
Type ASTM
Processing Temperature (ºC)  116 - 233  compression molding  
 122 - 149  injection molding  
Linear Mold Shrinkage (cm/cm)  0.007 - 0.09   D955

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Suppliers
A. Schulman Akron, OH  800-662-7203
Equistar Chemicals LP Houston, TX  888-777-0232
Mobil Chemical Co. Edison, NJ   
Phillips Chemical Co. Bartlesville, OK  800-537-3746

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