General Awareness -Physics- Synthetic Fibres and plastics
1-Synthetic fibres are made of very large units called polymers.
Polymer
2-Rayon is an artificial silk made up of cellulose fibre.
3-Nylon is made artificially by using raw material like coal, water and air.
4-Polyester is a synthetic fibre.
Polyester
5-Acrylic is artificial wool made from coal,air, water, oil and limestone.
6-Petrochemicals are used to manufacture synthetic fibres.
Petrochemical Plant
7-Commonly used synthetic fibres are rayon,nylon,polyester and acrylic.
Stretching polyester fabric
8-The different types of fibres differ from one another in their strength ,water absorbing capacity,nature of burning,cost and durability.
9-The waste created by plastics is not environment friendly.
10-Plastic take years to decompose.
11-Synthetic fibres find uses ranging from household articles to healthcare.
12-Synthetic fibres blend with natural and artificial fibres.
Code Numbers-
13-Polyethylene Terepthalate (PET,PETE)
14-High Density Polyethylene (HDPE)
15-Vinyl (Polyvinyl Chloride OR PVC)
16-Low Density Polyethylene (LDPE)
17-Polypropylene (PP)
18- Polystyrene (PS)
19-Plastics which get deformed easily on heating and can be bebt are known as thermoplastics.
20-Alexander Parkes(1813- 1890)- Creator of first Plastic -Parkesine.
21- Hermann Staudinger (1881-1965) : A German Chemist ,in 1920 made an important step forward in the processing of synthetic materials when he developed thermoplastics which are stable in themselves.
Hermann Staudinger won Nobel Prize in 1953 for demonstrating that Polymers are long-chain molecules.
22-Father of Plastic Industry
A Belgian scientist named Dr. Leo Hendrik Baekeland was responsible for the invention of Bakelite.He is considered as the father of the present plastics industry.
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