ISO 75-2:2013 pdf free

ISO 75-2:2013 pdf free.Plastics – Determination of temperature of deflection under load
This part of ISO 75 specifies three methods, using different values of constant flexural stress, which can be used for the determination of the temperature of deflection under load of plastics (including flled plastics and fibre-reinforced plastics in which the fibre length, prior to processing, is up to 7,5 mm) and ebonite:
一method A, using a flexural stress of 1,80 MPa;
一method B, using a flexural stress of 0,45 MPa;
一method C, using a flexural stress of 8,00 MPa.
The standard deflection, used to determine the temperature of deflection under load corresponds to a flexural-strain increase,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 increase to the initial flexural strain depends on the modulus of elasticity, at room temperature, of the material under test. This method is, therefore, only suitable for comparing the temperatures of deflection of materials with similar room-temperature elastic properties.
NOTE 1 The methods give better reproducibility with amorphous plastics than with semi-crystalline ones.  With some materials, it can be necessary to anneal the test specimens to obtain reliable results. Annealing procedures, if used, generally result in an increase in the temperature of deflection under load (see 6.6).
NOTE 2 For additional information, see ISO 75-1:2013, Clause 1.
The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For undated references, the latest edition of the referenced document (including any amendments) applies.
ISO 75-1, Plastics一Determination of temperature of deflection under load一Part 1: General test method
ISO 293, Plastics一Compression moulding of test specimens of thermoplastic materials
ISO 294-1, Plastics 一Injection moulding of test specimens of thermoplastic materials一Part 1: General principles, and moulding of multipurpose and bar test specimens
ISO 2818, Plastics一Preparation of test specimens by machining
ISO 10724-1, Plastics一Injection moulding of test specimens of thermosetting powder moulding compounds (PMCs)一Part 1: General principles and moulding of multipurpose test specimens
ISO 20753, Plastics一Test specimens.ISO 75-2 pdf download.