eFunda Polymers: Properties of Polyester (thermoset) {glass fiber reinforced, unidirectional glass}
engineering fundamentals Polymer Material Properties
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Polyester (thermoset)
 
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Additives: glass fiber reinforced, unidirectional glass
Material Properties
 Mechanical Properties Conditions
State 1 State 2 ASTM
Flexural Modulus (MPa)  41400   23 ºC   D790
Tensile Strength (MPa)  621 at break   D638
Flexural Strength (MPa)
at yield or break
 1104     D790
Elongation at break (%)   1 - 2     D638
Izod Impact (J/cm of notch)
1/8" thick specimen unless noted
  37.1     D256A

 Thermal Properties Conditions
Pressure State ASTM
Coef of Thermal Expansion (10-6/ºC)   6     D696
Deflection Temperature (ºC)  260   1.82 MPa  lower limit D648

 Physical & Electrical Properties Conditions
State ASTM
Specific Gravity  1.95   D792
Water Absorption (% weight increase)  0.1  after 24 hrs D570

 Processing Properties Conditions
Type ASTM
Molding Pressure (MPa)   3 - 14    
Compression Ratio  1    
Linear Mold Shrinkage (cm/cm)  0   D955

Suppliers
Quantum Composites, Inc. Midland, MI  800-462-9318
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