eFunda Polymers: Properties of Phenolic {phenol-formaldehyde, high strength glass fiber reinforced, molding compounds}
engineering fundamentals Polymer Material Properties
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Phenolic		  
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State: phenol-formaldehyde
Additives: high strength glass fiber reinforced
Application: molding compounds
Material Properties
 Mechanical Properties Conditions
State 1 State 2 ASTM
Elastic Modulus (MPa)  13110 - 22770  tensile   D638
 18906 - 24150  compressive   D638
Flexural Modulus (MPa)   7935 - 22770   23 ºC   D790
Tensile Strength (MPa)   49 - 125 at break   D638
Compressive Strength (MPa)
at yield or break		  111 - 483     D695
Flexural Strength (MPa)
at yield or break		   83 - 414     D790
Elongation at break (%)   1     D638
Hardness   54 - 101  Rockwell E   D638
  72  Barcol   D638
Izod Impact (J/cm of notch)
1/8" thick specimen unless noted		   0.3 - 9.5     D256A

 Thermal Properties Conditions
Pressure State ASTM
Coef of Thermal Expansion (10-6/ºC)   8 - 34     D696
Deflection Temperature (ºC)  177 - 316   1.82 MPa   D648
Thermal Conductivity (W/m-ºC)  0.334 - 0.585     C177

 Physical & Electrical Properties Conditions
State ASTM
Specific Gravity  1.69 - 2   D792
Water Absorption (% weight increase)  0.12 - 1.5  saturated D570
 0.03 - 1.2  after 24 hrs D570
Dielectric Strength (V/mil);
1/8" thick specimen unless noted		   140 - 400   D149

 Processing Properties Conditions
Type ASTM
Melting Temperature (ºC)  thermoset  Tm, crystalline  
Processing Temperature (ºC)  149 - 194  compression molding  
 149 - 177  transfer molding  
 166 - 199  injection molding  
Molding Pressure (MPa)   7 - 138    
Compression Ratio  2 - 10    
Linear Mold Shrinkage (cm/cm)  0.001 - 0.004   D955

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Suppliers
Cytec Fiberite, Inc. Tempe, AZ   
Occidental Chemical Corp. Dallas, TX  800-578-8880
Plastics Engineering, Inc. Auburn Hills, MI   
Quantum Composites, Inc. Midland, MI  800-462-9318
Resinoid Engineering Corp. Hebron, OH   
Rogers Corp. Rogers, CT  800-227-6437

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