Coefficient of Linear Thermal Expansion (CLTE) - ASTM D696 Plastic Test Standard
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Property information for specific grades of resin are available in the Prospector Plastics Database. Property Search let's you search for plastics by more than 400 material properties. Coefficient of Linear Thermal Expansion (CLTE) - ASTM D696The change in length per unit length of a material per degree of temperature change. CLTE is measured using a silica dilatometer. A specimen is placed inside a silica tube and silica rod is inserted into the tube. A dial gage or similar device is attached to the rod.
Dilatometer SetupThe end of the tube containing the test specimen is placed in a -30°C (-22°F) constant temperature bath. After the specimen has reached a temperature of -30°C (as indicated by no movement in the dial gage), the constant temperature bath is replaced by a 30°C (86°F) constant temperature bath. After the specimen has reached a temperature of 30°C, the 30°C bath is replaced by the -30°C bath. After the specimen has reached a temperature of -30°C, the specimen is removed and measured at room temperature. ASTM D696 covers temperatures between -30°C and 30°C.
CLTE TestCLTE (α) is calculated using the formula:
Similar StandardsProperty information for specific grades of resin are available in the Prospector Plastics Database. |
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