eFunda Polymers: Properties of Epoxy {silica filled, casting resins and compounds}
engineering fundamentals Polymer Material Properties
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Epoxy
 
List of Suppliers
Additives: silica filled
Application: casting resins and compounds
Material Properties
 Mechanical Properties Conditions
State 1 State 2 ASTM
Tensile Strength (MPa)   48 - 90 at break   D638
Compressive Strength (MPa)
at yield or break
 104 - 242     D695
Flexural Strength (MPa)
at yield or break
  55 - 97     D790
Elongation at break (%)   1 - 3     D638
Hardness   85 - 120  Rockwell M   D638
Izod Impact (J/cm of notch)
1/8" thick specimen unless noted
  0.2 - 0.2     D256A

 Thermal Properties Conditions
Pressure State ASTM
Coef of Thermal Expansion (10-6/ºC)   20 - 40     D696
Deflection Temperature (ºC)   71 - 288   1.82 MPa   D648
Thermal Conductivity (W/m-ºC)  0.418 - 0.836     C177

 Physical & Electrical Properties Conditions
State ASTM
Specific Gravity  1.6 - 2   D792
Water Absorption (% weight increase)  0.04 - 0.1  after 24 hrs D570
Dielectric Strength (V/mil);
1/8" thick specimen unless noted
  300 - 550   D149

 Processing Properties Conditions
Type ASTM
Melting Temperature (ºC)  thermoset  Tm, crystalline  
Linear Mold Shrinkage (cm/cm)  5 - 0.008   D955

Suppliers
Conap, Inc. Olean, NY  800-836-3666
Emerson & Cuming Specialty Polymers Billerica, MA  800-832-4929
Epic Resins Palmyra, WI  800-242-6649
ITW Devcon Danvers, MA  800-933-8266
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