eFunda Polymers: Properties of Epoxy {unfilled, casting resins and compounds}
engineering fundamentals Polymer Material Properties
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Epoxy
 
List of Suppliers
Additives: unfilled
Application: casting resins and compounds
Material Properties
 Mechanical Properties Conditions
State 1 State 2 ASTM
Elastic Modulus (MPa)   2415  tensile   D638
Tensile Strength (MPa)   28 - 90 at break   D638
Compressive Strength (MPa)
at yield or break
 104 - 173     D695
Flexural Strength (MPa)
at yield or break
  90 - 145     D790
Elongation at break (%)   3 - 6     D638
Hardness   80 - 110  Rockwell M   D638
Izod Impact (J/cm of notch)
1/8" thick specimen unless noted
  0.1 - 0.5     D256A

 Thermal Properties Conditions
Pressure State ASTM
Coef of Thermal Expansion (10-6/ºC)   45 - 65     D696
Deflection Temperature (ºC)   46 - 288   1.82 MPa   D648
Thermal Conductivity (W/m-ºC)  0.188     C177

 Physical & Electrical Properties Conditions
State ASTM
Specific Gravity  1.11 - 1.4   D792
Water Absorption (% weight increase)  0.08 - 0.15  after 24 hrs D570
Dielectric Strength (V/mil);
1/8" thick specimen unless noted
  300 - 500   D149

 Processing Properties Conditions
Type ASTM
Melting Temperature (ºC)  thermoset  Tm, crystalline  
Linear Mold Shrinkage (cm/cm)  0.001 - 0.01   D955

Suppliers
Ciba Specialty Chemicals Corp. Tarrytown, NY  800-431-2360
Conap, Inc. Olean, NY  800-836-3666
Dow Plastics Midland, MI  800-441-4369
Emerson & Cuming Specialty Polymers Billerica, MA  800-832-4929
Epic Resins Palmyra, WI  800-242-6649
ITW Devcon Danvers, MA  800-933-8266
Shell Chemicals Houston, TX  800-872-7435
United Mineral & Chemical Corp. Lyndhurst, NJ  800-777-0505
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