Hobbies And Interests
Resistance to Nature
One of the primary physical characteristics of EPDM is that is can withstand a large range of normal weathering. It can withstand temperatures of -50 to 160 Celsius. According to the Shore A type Durometer test, it can have a hardness of 30A to 95A. The A rating means that the rubber is not very dense or particularly hard. It is also resistant to sunlight, tearing, abrasion and oxidation. Resistant is a relative term because different types of EPDMs have different such characteristics.
Resistance to Manufacturing Environments
EPDM is extremely useful as it is resistant to a lot of the dangerous substances and forces that occur in manufacturing environments. It is a stable nonpolar compound known as an elastomer and as such is resistant to solvents and electricity.
Tensile Strength
Tensile strength is the measure of a material's resistance to stretching. It is measured in Mega Pascals and it takes between 7 and 21 to permanently deform an EPDM. Another way to describe this is by the percent elongation that it can experience, which varies between 100 percent and 600 percent.
Specific Gravity
EPDMs have a specific gravity measuring between 0.855 to 0.88 grams per milliliter. The specific gravity measures how much it weighs per amount of volume. They have a diene content of 0 to 15 percent by weight. Their ethylene content is between 45 and 80 percent by weight. The specific gravity is important for weight calculations. The different ethylene and diene content amounts are important as they define the properties of the EPDM, much the same as different carbon amounts define the properties of different types of steel.