eFunda Polymers: Properties of Polycarbonate {polycarbonate / polyester blends, impact modified}
engineering fundamentals Polymer Material Properties
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Polycarbonate		  
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Additives: polycarbonate / polyester blends, impact modified
Material Properties
 Mechanical Properties Conditions
State 1 State 2 ASTM
Flexural Modulus (MPa)   1932 - 2243   23 ºC   D790
Tensile Strength (MPa)   53 - 59 at break   D638
  52 - 58 at yield   D638
Compressive Strength (MPa)
at yield or break		   49     D695
Flexural Strength (MPa)
at yield or break		   76 - 87     D790
Elongation at break (%)   120 - 165     D638
Hardness  114 - 122  Rockwell R   D638
Izod Impact (J/cm of notch)
1/8" thick specimen unless noted		   1.1 - 9.5     D256A

 Thermal Properties Conditions
Pressure State ASTM
Coef of Thermal Expansion (10-6/ºC)   80 - 95     D696
Deflection Temperature (ºC)  107 - 130   0.46 MPa   D648
  88 - 122   1.82 MPa   D648
Thermal Conductivity (W/m-ºC)  0.180     C177

 Physical & Electrical Properties Conditions
State ASTM
Specific Gravity  1.2 - 1.22   D792
Water Absorption (% weight increase)  0.35 - 60  saturated D570
 0.12 - 0.16  after 24 hrs D570
Dielectric Strength (V/mil);
1/8" thick specimen unless noted		   440 - 500   D149

 Processing Properties Conditions
Type ASTM
Processing Temperature (ºC)  247 - 294  injection molding  
Molding Pressure (MPa)   104 - 138    
Compression Ratio  2 - 2.5    
Linear Mold Shrinkage (cm/cm)  0.006 - 0.009   D955

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Suppliers
Bayer Corp. Pittsburgh, PA  800-662-2927
Eastman Chemical Co. Kingsport, TN  800-327-8626
GE Plastics Pittsfield, MA  800-845-0600
MRC Polymers, Inc. Chicago, IL   
Polymer Resources, Ltd. Farmington, CT  800-243-5176

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