Chemistry project 12th Essay

This reaction is extremely exothermal. but that is non why the plastic produced is referred to as “thermoset” . Bakelite is a space-network polymer. Unlike additive and bifurcate polymers. which are composed of long molecules that make them more or less crystalline. space-network polymers are extremely and irregularly cross-linked throughout the construction.

The sheer extent of the cross-linking means that a sample of the stuff is basically one mammoth molecule. Although heat softens and thaws additive and bifurcate polymers. heating doesn’t soften space-network polymers because such a softening would necessitate the breakage of covalent bonds. In fact. heating normally produces extra cross-linking in these polymers. doing them harder. It is for this ground that space-network polymers. such as Bakelite.

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are called thermoset plastics.Procedure:1. Take 5ml acetic acid and 2.

5ml methanal in a ledgeman. 2. Add 2mg of phenol to this solution and stir the mixture. 3. Wrap a fabric slackly round the beaker.4. Stir the solution good while heating.5.

Pass dry hydrochloric acid gas or add a few milliliter of homocentric hydrochloric acid into the mixture.

Observation:A big mass of light pink plastic is produce within 5 proceedingss.
Precautions:a ) The face of the beaker should non be towards the face of the worker during warming. B ) Hydrochloric acid should non be poured into reaction mixture really easy. degree Celsius ) The contact of phenol with tegument should be avoided.
Caution:As the reaction is sometimes vigorous while adding hydrochloric acid.

It is better to be a few pess off from the beaker till the reaction in complete.
Scope of the experiment:Uses of Bakelite are following:Substitute:Bakelite is used as a replacement of porcelain & A ; other opaque ceramic stuffs. Board/table top:It is used in the country of board & A ; table top games e. g. Billiard balls. Dominoes etc.

Climb:It is used in mounting of metal samples.It is used in whistlings. cameras. solid organic structure & A ; electric guitars. Bakelite is really suited for emerging Electric & A ; car industries because as its excess ordinary opposition but besides due to its thermic opposition.

It has been widely used in jewelry merchandises.

Mentions:1. Wikipedia hypertext transfer protocol: //en. wikipedia. org/wiki/bakelite 2.

World Wide Web. scribd. com3. Comprehensive chemical science practical category Twelve

Recognition:I owe a great many thanks to a great many people who helped and supported me during the undertaking. My deepest thanks to.

the usher of the undertaking for steering and rectifying assorted paperss of mine with attending and attention. She has taken hurting to travel through the undertaking and do necessary rectification as and when needed. I express my thanks to the principal. for widening his support. My deep sense of gratitude to the in charge of chemical science lab at CSE for their support and counsel.

Thankss and grasp to the helpful people at for the support. I would besides thank my school and my friends without whom this undertaking would hold been a distant world. I besides extend my heartfelt thanks to my household and good wishers.


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