PLASTICS – DETERMINATION OF TEMPERATURE OF DEFLECTION UNDER LOAD – PART 2: PLASTICS AND EBONITE (FIRST REVISION) (ISO 75-2:2004, IDT)
This Malaysian Standard specifies three methods, using different values of constant flexural stress, that can be used for the determination of the temperature of deflection under load of plastics (including filled plastics and fibre-reinforced plastics in which the fibre length, prior to processing, is up to 7,5 mm) and ebonite: method A, using a flexural stress of 1,80 MPa; method B, using a flexural stress of 0,45 MPa; method C, using a flexural stress of 8,00 MPa.
The Malaysian Standard deflection ?s used to determine the temperature of deflection under load corresponds to a flexuralstrain increase ? ? f defined in this part of ISO 75. The initial flexural strain due to the loading of the specimen at room temperature is neither specified nor measured in this part of ISO 75. The ratio of this flexural-strain difference to the initial flexural strain depends on the modulus of elasticity, at room temperature, of the material under test.
This Malaysian Standard is therefore only suita
