These are found in nature. They are not made by any artificial method. Such as cotton, wool, silk etc. Cotton is a polymer of cellulose.
Synthetic fibers are also called man-made fibers because they are made by humans. Such as nylon, rayon, polyester, etc.
A synthesized fiber is also a series of small units. These synthesized fibers form polymers consisting of small units.
- Rayon is also called artificial silk. It is a polymer of cellulose.
- It is used in carpeting.
- Nylon is made up of adipic acid and hexamethylenediamine.
- Due to the strength of nylon, it is used in parachute ropes and in ropes used for climbing rocks. In addition, it is used in toothbrushes, tents, and curtains.Advertisement
- A polymer made from the iteration of the ester group is called polyester.
- It is obtained by the multiplication of ethylene glycol and terephthalic acid.
In plastic, the arrangement of units is linear or diagonally crossed.
There are two types of plastics
- Thermo-plastic: Plastic that easily deforms on heating and can be bend easily is called thermoplastic. Such as polyethylene, PVC, polystyrene etc.
- Polythene: It is a polymer of ethene.
- PVC (Polyvinyl Chloride): It is a polymer of vinylchloride.
2. Thermosetting: Plastics that are not molded repeatedly and cannot be softened by heating are called thermosetting plastics. Such as Bakelite, Melamine, etc.
Some Use of Plastic
- Bakelite: It is used in making cooking utensils, pressure cookers, electrical appliances, the handle of electric kettle, etc.
- Teflon is used in making non-stick griddles and Kadai etc.