Man-Made Materials
Chemistry · मानव निर्मित सामग्री · 11 facts
1
Plastic: synthetic polymer; Thermoplastic(PVC,polythene) vs Thermosetting(Bakelite)
2
PVC: pipes, wire insulation; Polythene: bags, packaging
3
Teflon(PTFE): non-stick cookware; heat resistant
4
Bakelite: first synthetic plastic(1907); switches, handles
5
Nylon: first fully synthetic fibre(1935); ropes, parachutes
6
Rayon: artificial silk from wood pulp; semi-synthetic
7
Polyester(PET): wrinkle-resistant; PET bottles
8
Rubber: natural(latex); Vulcanization+sulphur makes tough(Goodyear 1839)
9
Cement: calcium silicates; Portland by Aspdin(1824)
10
Glass: amorphous; SiO2+Na2CO3+CaCO3; transparent, brittle
11
Biodegradable(paper,cotton) vs Non-biodegradable(plastic,glass)