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Master Bond adhesives

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Dow Surlyn® 7940 Ionomer Resin, Lithium
Categories: Polymer; Thermoplastic; Ionomer; Ionomer, Molded

Material Notes: Surlyn® 7940 thermoplastic resin is an advanced ethylene/methacrylic acid (E/MAA) copolymer, in which the MAA acid groups have been partially neutralized with lithium ions. The amount of MAA and neutralization levels for this grade are optimized to deliver extra clarity and stiffness compared with other grades of Surlyn®. The resin can be injection or blow molded, and is processable by extrusion into sheets or shapes.

Data provided by the manufacturer.

This former DuPont product line is now a Dow product line.

Key Words: Ethylene/Methacrylic Acid (E/MAA) Copolymer
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Physical PropertiesOriginal ValueComments
Density 0.940 g/ccASTM D792
Melt Flow 2.6 g/10 min
@Load 2.16 kg,
Temperature 190 °C
condition E; ASTM D1238
 
Mechanical PropertiesOriginal ValueComments
Hardness, Shore D 68ASTM D2240
Tensile Strength, Ultimate 26.2 MPaASTM D638
Tensile Strength, Yield 15.2 MPa50 mm/min cross speed; ASTM D638
Elongation at Break 285 %ASTM D638
Flexural Modulus 0.420 GPaASTM D790
Izod Impact, Notched NBASTM D256
Tensile Impact Strength 460 kJ/m²ASTM D1822S
 
Thermal PropertiesOriginal ValueComments
Melting Point 91.0 °CDSC
Deflection Temperature at 0.46 MPa (66 psi) 46.0 °CASTM D648
Vicat Softening Point 63.0 °CRate B, ASTM D1525-70
 
Optical PropertiesOriginal ValueComments
Haze 4.0 %
@Thickness 6.40 mm
ASTM D1003A

Some of the values displayed above may have been converted from their original units and/or rounded in order to display the information in a consistent format. Users requiring more precise data for scientific or engineering calculations can click on the property value to see the original value as well as raw conversions to equivalent units. We advise that you only use the original value or one of its raw conversions in your calculations to minimize rounding error. We also ask that you refer to MatWeb's terms of use regarding this information. Click here to go back to viewing the property data in MatWeb's normal format.

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