1.0 Scope1.1 This method covers determination of the coefficient oflinear thermal expansion of electrical insulating materials1 byuse of a thermomechanical analyzer.1.2 This method is applicable to materials that are solid overthe entire range of temperature used, and that retain sufficienthardness and rigidity over the temperature range so that irreversible indentation of the specimen by the sensing probedoes not occur.1.3 Transition temperatures also may be obtained by thismethod.