Explain the formation of Bakalite? What are its important uses?
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It is prepared by the polymerization reaction between formaldehyde and phenol.
In the formation of Bakelite, the reaction mixture is prepared by mixing formaldehyde with phenol with glacial acetic acid under fume hood.
Some quantity of reaction mixture is taken in a beaker and placed on a white paper towel.
10 to 12ml of conc. Hydrochloric acid is added drop by drop by continuous stirring.
On heating polymerization begins, white precipitate starts appearing (60-55 degree C).
On vigorous and constant stirring pink colour plastic forms (75 to 60 degree C).
The reaction is very fast and heat of the reaction is also high.
Bakelite has a number of important properties. It can be molded very quickly, decreasing production time. Moldings are smooth, retain their shape and are resistant to heat, scratches, and destructive solvents. It is also resistant to electricity, and prized for its low conductivity. It is not flexible.
Phenolic resin products may swell slightly under conditions of extreme humidity or perpetual dampness.
When rubbed or burnt, Bakelite has a distinctive, acrid, sickly-sweet or fishy odor.
Applications and uses[]
These characteristics made Bakelite particularly suitable as a molding compound, an adhesive or binding agent, a varnish, and as a protective coating. Bakelite was particularly suitable for the emerging electrical and automobile industries because of its extraordinarily high resistance to electricity, heat and chemical action.
The earliest commercial use of Bakelite in the electrical industry was the molding of tiny insulating bushings, made in 1908 for the Weston Electrical Instrument Corporation by Richard W. Seabury of the Boonton Rubber Company.
Bakelite was soon used for non-conducting parts of telephones, radios and other electrical devices, including bases and sockets for light bulbs and electron tubes, supports for any type of electrical components, automobile distributor caps and other insulators.
By 1912, it was being used to make billiard balls, since its elasticity and the sound it made were similar to ivory.
During World War I, Bakelite was used widely, particularly in electrical systems. Important projects included the Liberty Motor,
the wireless telephone and radio phone
Hope this will help you...... ✌
In the formation of Bakelite, the reaction mixture is prepared by mixing formaldehyde with phenol with glacial acetic acid under fume hood.
Some quantity of reaction mixture is taken in a beaker and placed on a white paper towel.
10 to 12ml of conc. Hydrochloric acid is added drop by drop by continuous stirring.
On heating polymerization begins, white precipitate starts appearing (60-55 degree C).
On vigorous and constant stirring pink colour plastic forms (75 to 60 degree C).
The reaction is very fast and heat of the reaction is also high.
Bakelite has a number of important properties. It can be molded very quickly, decreasing production time. Moldings are smooth, retain their shape and are resistant to heat, scratches, and destructive solvents. It is also resistant to electricity, and prized for its low conductivity. It is not flexible.
Phenolic resin products may swell slightly under conditions of extreme humidity or perpetual dampness.
When rubbed or burnt, Bakelite has a distinctive, acrid, sickly-sweet or fishy odor.
Applications and uses[]
These characteristics made Bakelite particularly suitable as a molding compound, an adhesive or binding agent, a varnish, and as a protective coating. Bakelite was particularly suitable for the emerging electrical and automobile industries because of its extraordinarily high resistance to electricity, heat and chemical action.
The earliest commercial use of Bakelite in the electrical industry was the molding of tiny insulating bushings, made in 1908 for the Weston Electrical Instrument Corporation by Richard W. Seabury of the Boonton Rubber Company.
Bakelite was soon used for non-conducting parts of telephones, radios and other electrical devices, including bases and sockets for light bulbs and electron tubes, supports for any type of electrical components, automobile distributor caps and other insulators.
By 1912, it was being used to make billiard balls, since its elasticity and the sound it made were similar to ivory.
During World War I, Bakelite was used widely, particularly in electrical systems. Important projects included the Liberty Motor,
the wireless telephone and radio phone
Hope this will help you...... ✌
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See yhe
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The entropy of a system approaches a
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