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Rubbers are able to withstand large amounts of deformation without breaking as well as being able to return to their original shape after deformation. Similarly most polymers can undergo a large amount of plastic deformation prior to failure. This property is possible as polymer segments have a high mobility. As the temperature drops, this ability diminishes until the glass transition temperature is reached at which point, the materials becomes stiff and brittle. Brittleness Testers determine the lowest temperature at which rubbers and polymers do not exhibit brittle failure.
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Equipment
Tinius Olsen's Stiffness tester is suitable to determine the stiffness characteristics of a broad range of products and materials.
Manufactured in Taiwan by Hung Ta Instruments, this tester is used to soak specimens in a refrigerant under a given low temperature for 2.5 minutes (3 minutes for rubber) and then test for ruptures, so as to measure the brittleness resistance under low temperature.
The LTBT instrument is designed to determine the “TEMPERATURE” at which plastics and elastomers exhibit brittle failure under specified impact conditions.
Designed to study the effects on plastic polymers when subject to impact loads at low temperature. Many materials which are flexible at normal ambient temperature become brittle at low temperatures, which severely affect the material’s impact strength.
Taber’s V-5 Stiffness Tester - Model 150-B or 150-E has been specifically designed to determine materials’ stiffness and resiliency properties of up to 10,000 Taber Stiffness Units.
The CSI-153 Low Temperature Brittleness Tester is the most suitable apparatus used in the industry for the determination of the temperature at which plastics and elastomers exhibit brittle failure due to controlled impact.
This tester is equipped with a rotary holder to continuously run maximum of 4 tests. The testing condition (test temperature and dip time) for the 4 tests can be set on the touch panel screen, which will enable efficient testing.
The Brittleness Tester TM-2100 Series from Ueshima Seisakusho Co. determines the brittleness temperature and the 50% brittleness temperature of vulcanized rubber and plastics in a low-temperature environment.