Standard Guide Describing the General Principles for Determination of Tensile Properties of Plastics
|Publication Date:||10 June 1996|
|ICS Code (Plastics in general):||83.080.01|
1.1 This guide specifies the general principles for determining the tensile properties of plastics under defined conditions.
1.2 Several different types of test specimen are defined to suit different types of material that are detailed in other standards.
1.3 This guide is used to investigate the tensile behaviour of the test specimens and for determining the tensile strength, tensile modulus and other aspects of the tensile stress/strain relationship under the conditions defined.
1.4 This guide is selectively suitable for use with the following range of materials:
1.4.1 Rigid and semirigid thermoplastics moulding and extrusion materials, including filled and reinforced compounds in addition to unfilled types, rigid and semirigid thermoplastics sheets and films,
1.4.2 Rigid and semirigid thermosetting moulding materials, including filled and reinforced compounds, rigid and semirigid thermosetting sheets, including laminates,
1.4.3 Fibre-reinforced thermoset and thermoplastics composites incorporating unidirectional or nonunidirectional reinforcements such as mat, woven fabrics, woven rovings, chopped strands, combination and hybrid reinforcements, rovings and milled fibres, sheets made from pre-impregnated materials (prepregs), and
1.4.4 Thermotropic liquid crystal polymers.
1.5 This guide is not suitable normally for use with rigid cellular materials or sandwich structures containing cellular material.
1.6 This guide is applied using specimens that may be either moulded to the chosen dimensions or machined, cut, or punched from finished and semifinished products such as mouldings, laminates, films, and extruded or cast sheet. In some cases, a multipurpose test specimen (see ISO 3167:1993 (Specification D 5936)), may be used.
1.7 This guide specifies preferred dimensions for the test specimens. Tests that are carried out on specimens of different dimensions, or on specimens that are prepared under different conditions, may produce results that are not comparable. Other factors, such as the speed of testing and the conditioning of the specimens, also can influence the results. Consequently, when comparative data are required, these factors must be carefully controlled and recorded.
1.8 This guide is identical to ISO 527-1. This standard is comparable to Test Method D 638 but neither standard should be substituted for the other. The two standards may differ with respect to test specimen dimensions, test specimen conditioning, test equipment, testing conditions, etc. The two methods may not give the same results.
1.9 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.