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Determination of vulcanization characteristic of rubber compounds, including the scorch time, ts2 (the time a compound has to take the shape of the mold), optimum vulcanization time, t90, minimal & maximum torque & Delta S.
These are compound specific properties that determine the degree of vulcanization & length of time a particular product or test piece needs to be vulcanized.
The Tensile Strength of rubber indicates how much force or stress a rubber material can withstand before breaking. During the test we pull the material upto the point of failure. This point of rupture is called the ultimate tensile strength.
There are various method to measure hardness e.g Shore A & IRHD. They have no direct linear relation but they are comparable. Shore A & IRHD N(normal) are used for thicker test pieces. IRHD M (micro) is used for thinner test pieces and test pieces of particular curvatures.
To check the abrasion resistance & mileage of rubber compound.
These analyses are needed as quality control of rubber compounds and determine the amount of specific ingredients required to produce a certain volume of material. For example, to check how many gram of rubber compound is required to make a particular test piece or product & also to determine the batch weight for optimum quality production.
These are indications for the permanent deformation of a material after it has been compressed or strained for a certain time under certain conditions
It’s also a good method to determine whether a material or product has been properly vulcanized. This is a key property for sealing applications.
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