Important synthetic rubbers: nitrite rubbers , Chemistry

Nitrite rubbers (Gr-A or Buna-N or NBR): Nitrite rubber is prepared by the copolymerization of butadiene and acrylonitrile in emulsion systems.

Properties:

1.                 These rubbers have low swelling, low solubility, good tensile strength and abrasion resistance even after immersion in gasoline and oils.

2.                 They are less resistant to alkalis due to the presence of cyno groups.         

3.                 They have excellent resistance to heat oils, chemicals, aging (sunlight).

4.                 As the acrylonitrile percentage is increased in nitrile rubber, its resistance to acids salts, oils, solvents etc. increases.

5.                 Vulcanized nitrile rubber is more resistant to heat and sunlight than natural rubber and it may be exposed to high temperature.

Uses: nitrile rubber is used for making:

1.                 Oil resistant foam

2.                 Conveyor belts

3.                 Lining of hose

4.                 Gas kits

5.                 Printing rollers

6.                 Automobile parts and high altitude aircraft components

7.                 House and

8.                 Adhesives.

9.                 Creamery equipment etc.

Posted Date: 7/21/2012 8:29:46 AM | Location : United States







Related Discussions:- Important synthetic rubbers: nitrite rubbers , Assignment Help, Ask Question on Important synthetic rubbers: nitrite rubbers , Get Answer, Expert's Help, Important synthetic rubbers: nitrite rubbers Discussions

Write discussion on Important synthetic rubbers: nitrite rubbers
Your posts are moderated
Related Questions
LITHIUM AND BERYLLIUM MARKEDLY DIFFERENT FROM OTHER MEMBERS OF THEIR RESPECTIVE GROUP?.

Q. Show Redox Reactions as Electron Transfer? Ans. Oxidation is a process where electrons are lost, and reduction is a process where electrons are gained. For example,

Polynuclear benzenoid hydrocarbons are provided to be carcinogenic that means cancer producing.There are liberated by incomplete combusion of certain substances like tobacoo,coal p

Antioxidants: Antioxidants are the significant and essential food additives. These substances hold back the action of oxygen on the food and hence help in its preservation. Th

Field processing Certain processing techniques at the field itself could help to reduce the chances of spoilage of  the fresh produce, specially during transportation. Fruits a

Polyglycolic acid (PGA) : It is acquired by the chain polymerisation of cyclic dimer of glycolic acid, OH-CH2-COOH.

Q. Show the Units of Measurement? You most likely know your height in feet and inches. The majority people outside the United States however measure height in meters and centim

The electron density between 1s and  2s orbital is : (1) High (2) Low (3) Zero (4)None of these Ans:Zero

what are the demerits of Bohr''s atomic model?

you are provided with a monobasic acid , HX with a concentration in the range of 0.5moldm-3. You arerequired to plan and carry out an experiment to determine that exact concentrati