Temperature Retraction Testers

Rubbers and elastomeric materials are characterized by their ability to undergo large amounts of deformation and then return to their original state. However, as temperatures drop, this ability is decreased until its glass transition temperature is reached. Cooling below this temperature will produce a stiff, brittle material. The temperature retraction or TR test involves stretching a rubber sample and cooling to -70°C and then measuring the retraction in length as the temperature in slowly increased. This type of testing is particularly important when rubber materials are exposed to cooler climates such as in Scandinavia.

Equipment

Elastocon Temperature Retraction Tester from Nortest

The Elastocon TR-tester is computerised and performs the test automatically after the cooling media has been cooled and the samples have been mounted. An automatic release of the samples, after the precooling period, is included.

TR 2200 Temperature Retraction Tester from Benz Materials Testing Instruments

The Benz TR 2200 temperature retraction tester measures the effects of low temperature on rubber, plastic and other elastomeric materials. Meeting and exceeding ISO 2921 and ASTM D-1329, the TR 2200 allows the accurate evaluation of crystallization and the comparison of rubber and rubber-like sample viscosity at low temperatures.

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