What are the 5 properties of rubber?
Natural Rubber
Some of the material’s key characteristics are high tear and tensile strength, resilience, and resistance to abrasion, friction, extreme temperatures, and water swell.
What are the chemical properties of rubber?
Chemistry and Properties
Natural rubber is a polyterpene, i.e., it consists of isoprene molecules linked into loosely twisted chains. The monomer units along the backbone of the carbon chains are in a cis arrangement (see isomer) and it is this spatial configuration that gives rubber its highly elastic character.
What are 3 physical properties of rubber?
These are the physical properties of rubber.
- Hardness.
- Tensile Strength.
- Tensile Modulus.
- Elongation.
- Resilience.
- Compression Set.
- Tear Resistance.
- Abrasion Resistance.
Which is the most useful property of rubber?
It is elastic; because of this property a rubber band can be stretched to 9 or 10 times its original length and when the load is removed it regains its original length. 2. It is strong and tough. Because of this property it can be put to use even under abnormal conditions.
What is natural rubber compound?
Natural rubber is polyisoprene in which monomer units are of isoprene i,e 2-methyl-1,3 butadiene. Natural rubber is obtained in the form of solid particles suspended in a milky white liquid (called latex) that drips from the bark of certain tropical and subtropical trees.
What are two properties of natural rubber?
Natural Rubber Properties
- Abrasion Resistance: Excellent.
- Tear Resistance: Excellent.
- Solvent Resistance: Poor.
- Oil Resistance: Poor.
- Aging Weather/Sunlight: Poor.
What is property of rubber?
It has excellent tensile, elongation, tear resistance and resilience. It has good abrasion resistance and excellent low temperature flexibility. Without special additives, it has poor resistance to ozone, oxygen, sunlight and heat. It has poor resistance to solvents and petroleum products.
What is chemical composition of rubber?
Natural rubber is a polymer of isoprene (also known as 2-methylbuta-1,3-diene) with the chemical formula (C5H8)n. To put it more simply, it’s made of many thousands of basic C5H8 units (the monomer of isoprene) loosely joined to make long, tangled chains.
What is 100% modulus in rubber?
Modulus, as used in rubber terminology, refers to stress at a predetermined elongation, usually 100%. It is expressed in pounds per square inch (psi) or MPa (Mega Pascals). This is actually the elastic modulus of the material.
What is the unique physical property of rubber?
It has outstanding resistance to oxygen, ozone, and sunlight. Its resistance to polar materials such as phosphate esters, many ketones and alcohol. It has good electrical properties, low temperature flexibility, excellent heat, water and steam resistance. Its resistance to petroleum products is poor.
What is rubber compound used for?
Rubber compounding involves the science and engineering of rubbers and rubber additives, such as processing aids, fillers, and curing agents, in definite proportions to obtain a uniform mixture that will have desirable physical and chemical properties to meet processing at low cost and end use performance.
Why rubber is compounded?
Elastomers such as natural and synthetic rubbers are amorphous polymers and are viscoelastic in nature. These materials have lower mechanical and thermal properties. To overcome this problem various ingredients are added to the rubber matrix to improve its functional properties, this process is termed as compounding.
What are the 10 uses of rubber?
Here are some of its uses:
- Tires and Tubers.
- Manufacturing of automobile padding.
- Manufacturing of airbags.
- Flooring purposes.
- Used in the manufacturing of clothes.
- Manufacturing of erasers, balls and waterproof shoes.
- Manufacturing of nozzle sprayers.
- Manufacturing of latex and tubes.
What type of material is rubber?
Technically speaking, rubber is a natural polymer of Isoprene (usually cis-1,4-polyisoprene). It is hydrocarbon polymer occurring as milky latex in the sap of various plants and can also be made synthetically.
What is the strength of rubber?
Solid rubber, with a consistency of pencil erasers, has a hardness of 40 duro. By contrast, harder rubber, like that used in hockey pucks, has 90 duro hardness.
Why is sulfur used in rubber?
Mineral sulfur is a widely used ingredient to form cross-links between the rubber chains in the vulcanization process. During compounding, a high elastic state of sulfur at temperatures between 40°C and 70°C promotes elongation of its particles and, next, breaking these thin and weak needles into pieces.
What is synthetic rubber properties?
Synthetic Rubber Properties
These qualities largely stem from the material’s resistance to damage and degradation from chemicals, high and low temperature, ozone, sunlight, and weathering. Other key properties include superior flexibility at low temperatures and suitability as an electrical insulator.
What is MPa in rubber?
Tensile Strength is the force required to cause the rupture of a rubber material. Normally expressed in Megapascals (Mpa). A solid rubber with a higher Mpa reading would normally indicate a better quality of material.
What is stiffness of rubber?
For the purposes of vibration isolation, the stiffness of the rubber is a function not only of frequency but also of the amplitude of the vibration. To allow for this, the shear moduli of the rubber at low strains, of the order of 1%, are required, over a range of frequencies.
What is the strongest type of rubber?
Nitrile. Nitrile (also known as Buna-N) is a copolymer of butadiene and acrylonitrile and one of the strongest rubber materials in applications involving oil and fuel.
What is compound rubber?
Rubber compounding or formulation refers to the addition of certain chemicals to raw rubber in order to obtain the desired properties. The well-known chemicals are crosslinking agents, reinforcements, anti degradants and colorants.
What is the chemical composition of rubber?
Chemical Name and Chemical Formula of Rubber
Isoprene (2-methyl, 13-butadiene) is the monomer of natural rubber. Natural rubber is the polymer of this isoprene, and its chemical name is ‘cis – 1,4 – polyisoprene.
What is compounded rubber?
What are the ingredients used in rubber compounding?
Ingredients in rubber compounds are a large group of components, including curing agents, accelerators and vulcanization activators, antioxidants, plasticizers, fillers and special additives (blowing agents, dyes, etc.).
What is the main use of rubber?
Natural rubber is one of the most important polymers for human society. Natural rubber is an essential raw material used in the creation of more than 40,000 products. It is used in medical devices, surgical gloves, aircraft and car tires, pacifiers, clothes, toys, etc.