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Advanced Elastomer Systems Santoprene® 121-87 Thermoplastic Rubber
Subcategory: Elastomer, TPE; Polymer; Thermoplastic
Material Notes:
A black thermoplastic UV grade elastomer with good fluid resistance, formulated to replace thermoset elastomers such as EPDM, polychloroprene, and chlorosulfonated polyethylene. It can be processed using injection molding, extrusion, blow molding or other melt processing techniques.
Key Features: Dielectric constant 2.3, dielectric strength at 3.17 mm (125 mil), 19.6 kV/mm (500 v/mil); Flame resistant HB material; Continuous temperature rating 1000 hrs. @ 135°C (275°F); Excellent flex fatigue resistance; Excellent ozone resistance; Excellent UV resistance
Additional processing comments: This thermoplastic rubber is a shear-dependent material that can be processed on conventional thermoplastic equipment for injection molding, extrusion, or blow molding. For extrusion, a general purpose screw with a compression ratio of 2.5 to 3.0 is recommended. Material can be recycled. SANTOPRENE rubber is incompatible with acetal and PVC.
Values below are for injection molded plaques, side gated, 82.6 mm x 117.5 mm x 3.0 mm. Tensile properties measured across flow. Data provided by Advanced Elastomer Systems.
| Physical Properties | Metric | English | Comments | |
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| Density | 0.96 g/cc | 0.0347 lb/in³ | TPE-0105 (ASTM D792) | |
Mechanical Properties | ||||
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| Hardness, Shore A | 87 | 87 | 5 Second; TPE-0169 (ASTM D 2240) | |
| Tensile Strength, Ultimate | 14.2 MPa | 2060 psi | TPE-0153 (ASTM D 412) | |
| Elongation at Break | 550 % | 550 % | TPE-0153 (ASTM D 412) | |
| 100% Modulus | 0.007 GPa | 1.02 ksi | TPE-0153 (ASTM D 412) | |
| Tear Strength | 48 kN/m | 274 pli | 48 kN/m at 23°C. Value at 100°C is 23 kN/m. TPE-0056 (ASTM D 624) | |
| Compression Set | 30 % | 30 % | 23°C, 168 hrs.; TPE-0016 (ASTM D 412) | |
| Compression Set, Elevated Temperature | 47 % | 47 % | 100°C, 168 hrs.; TPE-0016 (ASTM D 412) | |
| Tensile Set | 33 % | 33 % | 23°C, 168 hrs.; TPE-0053 (ASTM D 412) | |
Electrical Properties | ||||
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| Dielectric Constant | 2.3 | 2.3 | Frequency not specified | |
| Dielectric Strength | 19.6 kV/mm | 498 kV/in | at 3.17 mm (0.125 in) | |
Thermal Properties | ||||
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| Maximum Service Temperature, Air | 135 °C | 275 °F | Continuous temperature Rating, 1000 hours | |
| Brittleness Temperature | Max -60 °C | Max -76 °F | TPE-0089 (ASTM D 746) | |
| Flammability, UL94 | HB | HB | ||
Processing Properties | ||||
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| Processing Temperature | 177 - 232 °C | 351 - 450 °F | ||
| Drying Temperature | 82 °C | 180 °F | Desiccant drying for 3 hours recommended | |
| Dry Time | 3 hour | 3 hour | ||
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