Properties 

Styrene-Maleic Anhydride  Copolymer  (SMA)
Molding and Extrusion

Topics   Index

**************************************
Copyright 2002 by Roger D. Corneliussen
**************************************

Values are from Modern Plastics Encyclopedia 99.

To jump to a particular property, click on the name 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)

--- gm /10 min

Melting Temperature  degrees C
Tm Crystalline
--- C

Glass Transition (C)
Tg (Amorphous)

114 C

Processing Temperature Range Degrees F
Extrusion

430 to 510 F for Injection Molding
400 to 500 F for Extrusion

Molding Pressure Range ( PSI) (ksi)
12000 to 17000 psi
12 to 17 ksi
80 to 113 MPa

To go back to the top of this page, click on
Top

Compression Ratio
---

Mold(Linear) Shrinkage (in/in)
ASTM D955
0.004 to 0.006 in/in 

Tensile Strength at Break
ASTM D638
8100 psi
54 MPa

To go back to the top of this page, click on
Top

Elongation at break (%)
ASTM D638
1.8 to 30 %

Tensile Yield Strength (psi)
ASTM D638
5200 to 8100 psi
35 to 54 MPa

Compressive Strength (psi)
Rupture or Yield
ASTM D695
--- psi
--- MPa

To go to Compressive Strength Values,
click on
Compressive Strength

To go back to the top of this page, click on
Top

Flexural Strength (psi)
Rupture or Yield
ASTM D790
8000 to 14200 psi
53 to 95 MPa

Tensile Modulus (psi)
ASTM D638
340000 to 390000 psi
2.3 to 2.6 GPa

To go to Modulus Values,
click on
Modulus

Compressive Modulus (psi)
ASTM D695
--- psi
--- GPa

To go back to the top of this page, click on
Top

Flexural Modulus (psi)
ASTM D790
At 73 F
320000 to 470000 psi
2.1 to 3.1 GPa
At 200 F
--- psi
--- GPa
At 250 F
--- psi
--- GPa
At 300 F
--- psi
--- GPa

Izod Impact (ft-lb/in of notch)
ASTM D256A

0.4 to 2.0  ft lb/in of notch

To go to Izod Values,
click on
Izod

To go back to the top of this page, click on
Top

Hardness
Rockwell ASTM D785
R106 to 109
--
Shore D65 ASTM D2240/D2583
D60 to 65

Coefficient of Linear Thermal Expansion
(10 exp-6 )in/in/C
 80 (10 x exp 6) in/in /C
0.000 080   in/in /C

Deflection Temperature under flexural load (F)
ASTM D648
264 psi ---
214 to 245 F
66 psi  ---
--- F

To go back to the top of this page, click on
Top

Thermal Conductivity
(10 x exp 4)al cm/sec cm2 C
ASTM C177
--- (10 x exp 4) cal cm/sec cm2
--- cal cm/sec cm2

Specific Gravity
ASTM D792
1.05 to 1.08

To go to Density /Specific Gravity Values,
click on
Density

Water Absorption
(1/8 in thick specimen) (%)
ASTM D570
24 hr --- 0.1 %
Saturation 
---  %

Dielectric Strength v/mil
(1/8 in thick Specimen; short time)
--- v/mil

**************************************

Top

Topics   Index

**************************************
Copyright 2002 by Roger D. Corneliussen
No part of this transmission is to be
duplicated, in any manor, or forwarded by
electronic mail without the express written
permission of Roger D. Corneliussen
**************************************

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Hit Counter