Rubber materials are broadly utilized in modern parts and general product, exploiting the mechanical properties of versatility and adaptability that are most attributes of rubber.
There are many sorts of elastic, including normal elastic, which has been utilized in modern applications since the mid 1800s, and different kinds of synthetically delivered engineered elastic, which have become increasingly more typical since their presentation during the 1900s.
The tensile strength of rubber indicates how much force or stress a rubber material can withstand before breaking. The tensile strength of rubber is typically expressed as the amount of force in megapascals (10-25 MPa) or pounds per square inch (psi). During this test we pull the material up to the point of failure. This point of rupture is called the ultimate tensile strength.
What is the best way to determine the tensile strength of rubber for an existing product?
To comprehend the rigidity of a current elastic part, a test piece in the genuine material used to fabricate that item would need to be made. This should be possible by embellishment an example sheet under the right fix conditions from the right compound, and afterward a bunch of free weight test pieces made and put through the test interaction portrayed previously. It is beyond the realm of possibilities to expect to lay out the data regarding this property from a non-standard shape, albeit exact relative testing might actually be utilized to show better or more awful execution.
What are the differences in rubber tensile strength between different kinds of rubber?
The rigidity of rubbers can change generally relying upon the compound being referred to; the distinctions in the designs of the polymer chains and their crosslinks give a wide scope of elasticity values and prolongation at break values. As ever with elastic, there is a practically endless blend of variable properties that should be considered for the best presentation in some random application, of which rigidity is just one - and which, indeed, may not be the main material property for certain applications.
Common Standards for Tensile Testing Polymer Materials
ASTM D412—Standard Test Methods for Vulcanized Rubber and Thermoplastic Elastomers—TensionBS ISO 37:2017—Rubber, vulcanized or thermoplastic — Determination of tensile stress-strain propertiesBS ISO 527—Plastics — Determination of tensile properties
Rubber Tensile Stress Strain Properties per ASTM D412 & ISO 37
ASTM D412 and ISO 37 are good tensile test methods to characterize the general stress-strain characteristics of natural rubber, synthetic rubber, silicone rubber, and TPEs (Thermoplastic Elastomers). Both ASTM D412 and ISO 37 specify the test method details to determine tensile stress-strain properties of molded and die cut rubber and elastomers. Rubber and elastomers both feature high extensibility and so extensometers are typically required to accurately measure elongation or stretch while loading is applied. An application engineer can assist in the selection of the best grip and jaw face for rubber tests. Pneumatic air grips with serrated or rubber coated faces are common. A constant gripping force can prevent specimen slippage when specimens elongate. Self-tightening grips, such as roller grips, are also adequate for rubber tests.
Conclusion
Our experts can conduct standard tests or design custom protocols to meet your specific needs. Testing for the property of tear resistance of thermoplastic elastomers and conventional vulcanized thermoset rubber are performed in MAEON laboratories using different shapes of specimens as per the standard chosen.
Visit at Rubber Testing Laboratory
Sign in to leave a comment.