|  | Tensile strength, ultimate elongation and 100% modulus are the properties measured when a straining force is applied to a test specimen. The values from these tests provide a good measure of plasticizer efficiency and stiffness of the vinyl material.
| Tensile Strength
Tensile strength is a measure of the amount of force per unit of original cross-sectional area that is applied when the test specimen fails. This test is performed following the procedure outlined in ASTM D 638. The plasticizer concentration has the same affect on tensile strength as it has on hardness, increasing plasticizer concentration decreases tensile strength. The tensile strength figure below illustrates the effect of Jayflex plasticizer concentration and type on the tensile properties of a compound.
| Ultimate Elongation
Ultimate elongation at break is a measure of the elongation of a test specimen at failure compared to the initial length and is performed following the procedures outlined in ASTM D 638. The ultimate elongation figure below illustrates the effect of Jayflex plasticizer concentration and type on the elongation properties of a compound.
| 100% Modulus
Modulus is the amount of force required to reach 100% elongation of a sample as outlined by the procedure in ASTM D 638. The modulus of a material represents its resistance to extension or stretching, therefore a higher modulus corresponds to a stiffer compound. The 100% modulus figure below illustrates the effect of Jayflex plasticizer concentration and type on the modulus.
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