Physics, asked by Rashi1811, 7 months ago

What is bakelite? What are its uses? (uses should be in points like this 1) ------- , 2) ------- ​

Answers

Answered by swagat18
2

Bakelite or polyoxybenzylmethylenglycolanhydride was the first plastic made from synthetic components. It is a thermosetting phenol formaldehyde resin, formed from a condensation reaction of phenol with formaldehyde.

USES OF BAKELITE:

*Bakelite due to its high resistance to electricity and heat is used in automotive components and industrial applications.

*Due to its excellent insulating properties it is used for making switches and other electrical appliances.

* It is also used to make various kitchenware products like frying pans etc.

*It is also used to make jewelry articles and toys.

Answered by tinalaroia
0

Answer: THERE YOU GO WITH THE ANSWER

Explanation:Baekeland was already wealthy due to his invention of Velox photographic paper when he began to investigate the reactions of phenol and formaldehyde in his home laboratory. Chemists had begun to recognize that many natural resins and fibers were polymers. Baekeland's initial intent was to find a replacement for shellac, a material in limited supply because it was made naturally from the excretion of lac insects (specifically Kerria lacca). Baekeland produced a soluble phenol-formaldehyde shellac called "Novolak", but it was not a market success.[4]

Baekeland then began experimenting on strengthening wood by impregnating it with a synthetic resin, rather than coating it.[4] By controlling the pressure and temperature applied to phenol and formaldehyde, Baekeland produced a hard moldable material that he named "Bakelite",[5][6] after himself. It was the first synthetic thermosetting plastic produced, and Baekeland speculated on "the thousand and one ... articles" it could be used to make.[7]:58–59 Baekeland considered the possibilities of using a wide variety of filling materials, including cotton, powdered bronze, and slate dust, but was most successful with wood and asbestos fibers.[7]

Baekeland filed a substantial number of patents in the area.[4] Bakelite, his "method of making insoluble products of phenol and formaldehyde," was filed on July 13, 1907, and granted on December 7, 1909.[8] Baekeland also filed for patent protection in other countries, including Belgium, Canada, Denmark, Hungary, Japan, Mexico, Russia, and Spain.[9] He announced his invention at a meeting of the American Chemical Society on February 5, 1909.[10]

The first semi-commercial Bakelizer, from Baekeland's laboratory, 1935

Baekeland started semi-commercial production of his new material in his home laboratory, marketing it as a material for electrical insulators. By 1910, he was producing enough material to justify expansion. He formed the General Bakelite Company as a U.S. company to manufacture and market his new industrial material. He also made overseas connections to produce materials in other countries.[4]

Bijker gives a detailed discussion of the development of Bakelite and the Bakelite company's production of various applications of materials.[11] As of 1911, the company's main focus was laminating varnish, whose sales volume vastly outperformed both molding material and cast resin. By 1912, molding material was gaining ground, but its sales volume for the company did not exceed that of laminating varnish until the 1930s.

As the sales figures also show, the Bakelite Company produced "transparent" cast resin (which did not include filler) for a small ongoing market during the 1910s and 1920s.[11]:172–174 Blocks or rods of cast resin, also known as "artificial amber", were machined and carved to create items such as pipe stems, cigarette holders and jewelry.[11][12] However, the demand for molded plastics led the Bakelite company to concentrate on molding, rather than concentrating on cast solid resins.[11]:172–174

The Bakelite Corporation was formed in 1922 after patent litigation favorable to Baekeland, from a merger of three companies: Baekeland's General Bakelite Company; the Condensite Company, founded by J.W. Aylesworth; and the Redmanol Chemical Products Company, founded by Lawrence V. Redman.[13] Under director of advertising and public relations Allan Brown, who came to Bakelite from Condensite, Bakelite was aggressively marketed as "the material of a thousand uses".[7]:58–59[14] A filing for a trademark featuring the letter B above the mathematical symbol for infinity was made August 25, 1925, and claimed the mark was in use as of December 1, 1924. A wide variety of uses were listed in their trademark applications.

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