ASTM D696-24 pdf download,Standard Test Method for Coefficient of Linear Thermal Expansion of Plastics Between 30°C and +30°C with a Vitreous Silica Dilatometer. 1.1 This test protocol is designed for the assessment of the linear thermal expansion coefficient in plastics that have an expansion coefficient in excess of 1 µm/(m·°C), employing a glassy silica dilatometer. The plastics being tested must demonstrate a minimal level of creep or elastic strain rate, or a combination of both, during the test conditions and the forces applied, to guarantee that the measurement accuracy is not adversely affected by these characteristics. 1.1.1 When testing at...