Elastic Modulus Of Natural Rubber

Main applications are flexible seals o rings etc.

Elastic modulus of natural rubber.

The term a portmanteau of elastic polymer is often used interchangeably with rubber although the latter is preferred when referring to vulcanisates. He then used a compound with low modulus that deformed easily allowing the door to close easily. Natural rubber is derived from a milky suspension found in the milky sap of some plants such as the hevea tree. Ut tensio sic vis latin sentence from robert hooke 1678 means such extension such strength proportionality rule.

Elongation is proportional to applied strength. E young s modulus of elasticity pa n m 2 lb in 2 psi named after the 18th century english physician and physicist thomas young. Hardness type a tensile strength at break mpa kgf cm 2 elongation at break hardness change type a change rate of tensile strength change rate of elongation at break black rubber sheet 30 50 48 48 8 9 9 1 600 4 2 7. Silicones are polymers with a si o si backbone.

Thomas young his british fellow countryman will leave his name associated to this linear behavior of many materials. This can be repeated many times with no apparent degradation to the rubber. An engineer was installing a rubber seal on a door. The rubber he used had high modulus.

Hardness type a tensile strength at break mpa kgf cm 2 elongation at break hardness change type a change rate of tensile strength change rate of elongation at break jis 1 volume change rate jis 3 volume change rate butyl sheet 40 40 38 8 3 85 640 11 4. Elastic modulus in static shear mpa jis k 6380 corres ponding no. Takl 5005 60 60 60. Synthetic elas tomers have widely varying static and dynamic properties compared to natural rub ber some of them have much greater resistance to degradation from heat oxidation.

The door was hard to close because the rubber resisted being deformed. It can be stretched by up to a factor of 10 from its original length and when released returns very nearly to its original length. A spring is an example of an elastic object when stretched it exerts a. Rubber is a member of a larger class of materials called elastomers and it is difficult to overestimate their economic and.

Rubber elasticity refers to a property of crosslinked rubber. Elastic modulus in static shear jis k 6380 corres ponding no. Young s modulus is measured during a tensile strength test. There are different types depending on functional groups in the structure and curing mechanisms.

An elastomer is a polymer with viscoelasticity i e both viscosity and elasticity and has very weak intermolecular forces generally low young s modulus and high failure strain compared with other materials. Young modulus for rubber. Key properties include thermal stability chemical stability electrical insulation and low toxicity. Gruand méca sarl cy for his redaction.

In the case of latex rubber it has an elastic modulus of about 0 1 gpa.