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Surlyn® 7940

Ethylene Methacrylic Acid

Supplied by DuPont Packaging & Industrial Polymers

The technical datasheet with complete property values for Surlyn® 7940 is available to members of the Prospector Plastics Database.
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Product Description
Surlyn® 7940 is a lithium ionomer thermoplastic resin. It is available for use in
conventional extrusion and injection equipment, to create various sheets or shapes.
Surlyn® 7940 thermoplastic resin is an advanced ethylene/acid/acylate terpolymer,
in which some of the MAA acid groups have been partially neutralized with lithium
ions.
General  
Material Status 
  • Commercial: Active
Availability 
  • Africa & Middle East
  • Asia Pacific
  • Europe
  • Latin America
  • North America
  • South America
Features 
  • Terpolymer
Forms 
  • Pellets
Processing Method 
  • Blow Molding
  • Extrusion
  • Injection Molding
  • Sheet Extrusion
  
Physical
Nominal Value
Unit
Test Method
Specific Gravity
      
--
 
 ASTM D792
--
g/cm³
 ISO 1183
Melt Mass-Flow Rate (MFR) (190°C/2.16 kg)
g/10 min
 ASTM D1238, ISO 1133
Mechanical
Nominal Value
Unit
Test Method
Tensile Strength
      
Yield, 73°F, Compression Molded 2
psi
 ASTM D638
Break, 73°F
psi
 ASTM D638, ISO 527-2
Tensile Elongation (Break, 73°F)
%
 ASTM D638, ISO 527-2
Flexural Modulus (73°F)
psi
 ASTM D790
Impact
Nominal Value
Unit
Test Method
Tensile Impact Strength
     ASTM D1822
-40°F
ft·lb/in²
  
73°F
ft·lb/in²
  
Hardness
Nominal Value
Unit
Test Method
Durometer Hardness (Shore D)
 
 ASTM D2240, ISO 868
Thermal
Nominal Value
Unit
Test Method
Vicat Softening Temperature
°F
 ISO 306/120, ASTM D1525 3
Peak Melting Temperature
°F
 ASTM D3418, ISO 3146
Optical
Nominal Value
Unit
Test Method
Haze (250 mil)
%
 ASTM D1003
Additional Information
Cation Type: Lithium
Freezing Point, ASTM D3418: 48°C
Maximum Processing Temperature: 285°C
Related Terminology
This supplier and product may also be known by these terms: Surlin

Product names can be difficult to match. You may have searched any one of these terms to find this product: Surlyn® 7940, Surlyn 7940, Surlyn® , Surlyn, Surlyn7940, 7940, Ethylene Methacrylic Acid, EMAA, Thermoplastic Elastomer, TPE, DuPont P&IP, EthyleneMethacrylicAcid, ThermoplasticElastomer
Injection
Nominal Value
Unit
 
Processing (Melt) Temp
°F
  
Notes
1Typical properties: these are not to be construed as specifications.
2Type IV, 2.0 in/min
3Rate B (120°C/h)
 
IDES
Copyright © 2012 IDES
The information presented on this datasheet was acquired by IDES from the producer of the material. IDES makes substantial efforts to assure the accuracy of this data. However, IDES assumes no responsibility for the data values and strongly encourages that upon final material selection, data points are validated with the material supplier.