ASTM D1708 | Plastics and Elastomers | Tension Testing
ASTM D1708 is a test method used to determine the tensile and elongation properties of plastics in the form of standard microtensile test specimens. Microtensile test specimens consist of materials of any thickness up to 3.2 mm (1/8 in), including thin films.
The convenient feature of D1708 is that the specimen shape is such that an extensometer is not required to perform the test. Rather, the universal testing machine’s built-in jaw separation position is sufficient to measure elongation. It becomes critical however that you have a very accurate initial jaw separation which happens to be less than an inch. Before conducting ASTM D1708, it is important to read the entire specification in the relevant ASTM publication.
A much more common test method to test similar materials is ASTM D638. For determination of Modulus of Elasticity, ASTM D638 should be performed. If interested, another ADMET article discusses ASTM D638 here.