Tensile and Tensile Adhesion Properties of Rigid Cellular Plastics ASTM D1623-17

Tensile and Tensile Adhesion Properties of Rigid Cellular Plastics ASTM D1623-17

ASTM D1623-17 test method determines cellular plastics' tensile and tensile adhesion properties and detects how they are affected by specific conditions of temperature, humidity, and testing machine speed. It uses different methods by the quantity of specimens obtained from the materials under test. The final results are expressed in SI units.

    Scope:

    The ASTM D1623-17 test method is essential in determining rigid cellular materials’ tensile and tensile adhesion properties under specific conditions and at different specimen quantities. It provides data for research and aids in development and quality control, along with specifying the applications of these materials. In this way, this test method defines the standard for preparing and testing rigid cellular materials, especially plastics. The durability of the materials concerning specific temperature, humidity and speed conditions is also observed.

    Procedure:

    The apparatus consists of a testing machine, grips, load indicator, extension indicator, and specimen cutter. The specimen area is measured, the load indicator is set to zero, and the specimen is inserted in the grips. The grip assembly is aligned concerning the specimen.  The screws are tightened until the surfaces of the specimen are firmly pressed. The measurements are taken with the help of a stress-strain curve formed by an extensometer. The extension of the specimen at the point of rupture is also calculated. 

    Specimen size:

    The specimen size should be as per the requirements. In this case, the dimensions of the specimen should be 1.129 inches or 28.7 mm in diameter and area 645 mm².

    Data:

    Elongation and tensile strength are determined. Calculate the standard deviation (estimated) as follows and report it to two significant figures:

    Where: s = estimated standard deviation,
    X = value of a single observation,
    n = number of observations, and X ̄ = arithmetic mean of the set of observations.

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