This standard specifies the method to determine the reversible linear thermal expansion of plastics with exclusion of changes in length due to accidental factors such as changes in moisture content, degree of polymerization and stress release. Since it will not be possible to exclude all these accidental factors, the method can be expected to give only approximate values.
BS EN 2155-12:1997 history
0000 BS EN 2155-12:1997(2000)
1997BS EN 2155-12:1997 Specification for test methods for transparent materials for aircraft glazing - Determination of linear thermal expansion