Maharashtra BoardEnglish MediumSTD 8ScienceMan-made Materials5 Marks
Question
How the plastic is produced?
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Answer
Plastics are derived from natural materials such as natural gas, oil, coal, minerals and plants.
The first synthetic plastics were i derived from cellulose, a substance found in plants and trees. This cellulose was heated with chemicals and resulted in a plastic like material.
In modern times, the different raw materials are used for making plastics, but most plastics are made from the hydrocarbons present in the natural gas, oil and coal.
Plastics are simply chains of like molecules linked together. These chains are called polymers. Thus, many plastics begin with “poly,” such as polyethylene, polystyrene and polypropylene.
These polymers are made of carbon and hydrogen and sometimes oxygen, nitrogen, sulphur, chlorine, fluorine, phosphorous or silicon.
Plastic is produced in factories by suitable chemical reactions.
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