Properties 

Polycarbonates /PC
High viscosity

Topics   Index

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Copyright 2002 by Roger D. Corneliussen
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Values are from Modern Plastics Encyclopedia 99.

To jump to a particular property, click on the name listed below.

Melt Flow
Melting Temperature
Glass Transition
Processing Molding Pressure
Processing Molding Temperature
Compression Ratio
Mold Shrinkage
Tensile Strength
Elongation
Tensile Yield Strength
Compressive Strength
Flexural Strength
Tensile Modulus
Flexural Modulus
Izod Impact Strength
Hardness
Deflection Temperature
Thermal Expansion
Thermal Conductivity
Specific Gravity
Dielectric Strength
Water Absorption

Note: The ASTM numbers are linked to 
their descriptions on the ASTM website.  
To go to the description, simply
click on the ASTM number

Melt Flow 
ASTM D1238
(gm/10 min)

3 to 10 gm /10 min

Melting Temperature  degrees C
Tm Crystalline
--- C

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Glass Transition (C)
Tg (Amorphous)

150 C

Processing Temperature Range Degrees F
Extrusion

560 F for injection molding

Molding Pressure Range ( PSI) (ksi)
10000 to 20000 psi
10 to 20 ksi
 67to 133 MPa

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Compression Ratio
1.74 to 5.5

Mold(Linear) Shrinkage (in/in)
ASTM D955
0.005 to 0.007 in/in

Tensile Strength at Break
ASTM D638
9100  to 10500 psi
61 to 70 MPa

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Elongation at break (%)
ASTM D638
110 to 120 % 

Tensile Yield Strength (psi)
ASTM D638
9000 psi
60 MPa

Compressive Strength (psi)
Rupture or Yield
ASTM D695
10000 to 12500 psi
67 to 83 MPa

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Flexural Strength (psi)
Rupture or Yield
ASTM D790
12000 to 13500 psi 
80 to 90 MPa

 Tensile Modulus (psi)
ASTM D638
345000 psi
2.3 GPa

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Modulus

Compressive Modulus (psi)
ASTM D695
350000 psi
2.3 GPa

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Flexural Modulus (psi)
ASTM D790
At 73 F
330000 to 340000 psi
2.2 to 2.3 GPa
At 200 F
275000 psi
1.8 GPa
At 250 F
245000 psi
1.6 GPa
At 300 F
--- psi
--- GPa

Izod Impact (ft-lb/in of notch)
ASTM D256

12 to 18 ft lb/in of notch (1/8 in)
2.3 ft lb/in of notch (1/4 in)

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Hardness
Rockwell ASTM D785
M70 to M75
--
Shore D65 ASTM D2240/D2583
D55-65

Coefficient of Linear Thermal Expansion
68 (10 x exp 6) in/in /C
0.000 068 to 0.000 150  in/in /C

Deflection Temperature under flexural load (F)
ASTM D648
264 psi ---
250 to 270 F
66 psi  ---
280 to 287 F

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Thermal Conductivity
ASTM C177
4.7 (10 x exp 4) cal cm/sec cm2
0.00047   cal cm/sec cm2

Specific Gravity
ASTM D792
1.2

To go to Density /Specific Gravity Values,
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Density

Water Absorption
(1/8 in thick specimen) (%)
ASTM D570
24 hr --- 0.15%
Saturation 
0.32 to 0.35  %

Dielectric Strength v/mil
(1/8 in thick Specimen; short time)
380 to >400 v/mil

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