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An important characteristic of a thermoplastic elastomer is its tensile modulus of elasticity. This is the material’s ability to resist stretching and is one of the indicators of the rubber-like properties of TPEs. The modulus of elasticity is determined on a tensile testing machine using TPE specimens shaped like a dumbbell.
The modulus of elasticity primarily depends on the hardness of the material. As hardness increases, the modulus of elasticity rises significantly. However, TPEs with the same hardness (for example, Shore A60 for sealing applications) may have different modulus values depending on the formulation. Low-quality TPE grades have a tensile modulus at 100% elongation of less than 0.5 MPa. This is due to the low rubber content and the high proportion of filler and oil in their composition.
The TPE grades we recommend have a modulus of elasticity of up to 1.5 MPa at 100% elongation and surpass rubbers in this performance parameter.
