Analysis of tensile properties of tpe materials
Time of issue:2023-10-25
Before understanding the tensile properties of TPE materials, it is important to understand the three concepts of tensile strength, elongation at break, and permanent deformation.
01 Tensile Strength
It refers to the external force used to stretch the material (dumbbell specimen) to a certain length. The greater the external force, the greater the tensile strength.
02 Elongation at break
It refers to the ratio of the length of the material (dumbbell specimen) when it is stretched to its ultimate breakage to the length of the material before it is stretched.
03Permanent Deformation
The percentage of the deformed size to the original size of the material specimen after eliminating the applied stress and resting for a certain period of time.
TPE tensile strength we all know, and in fact the data measured by the tensile machine is not only the tensile strength of such a data, there is the elongation at break, permanent deformation rate, 10% 50% 100% 300% constant tensile stress. But not all measured data are above.
Hooke's law
I don't know if you still remember Hooke's law? It is the linear relationship between stress and strain in a material after it has been subjected to a force. Of course. Hooke's law must be applied within the elastic limit of the material. What does that mean? It means that Hooke's law only applies if the permanent deformation rate of the material is zero.
TPE Tensile Properties
If the permanent deformation rate of a TPE material is 0, then 300% constant tensile stress should be 100% constant tensile stress of 3 times to the right, but due to the existence of permanent deformation of TPE, that is to say, TPE in the stretching of the molecular chain will exist in the case of destruction, so generally in the stretching of the more the last with a smaller force, so generally 300% constant tensile stress than 100% constant tensile stress of 3 times to be smaller. To small. The further you pull, the more serious the destruction of molecular chain, this situation will be more and more obvious.
There is also a more obvious law, that is, the general tensile strength of the material fracture elongation is small, the tensile strength of the material fracture elongation is large. (Provided, of course, that the material is of the same base material). In the case of filler is not taken into account, the higher the general hardness of the material tensile strength is also higher.
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