Man-Made Materials
Chemistry · मानव निर्मित सामग्री · 15 facts
Plastic: synthetic polymer; Thermoplastic(PVC,polythene) vs Thermosetting(Bakelite)
PVC: pipes, wire insulation; Polythene: bags, packaging
Teflon(PTFE): non-stick cookware; heat resistant
Bakelite: first synthetic plastic(1907); switches, handles
Nylon: first fully synthetic fibre(1935); ropes, parachutes
Rayon: artificial silk from wood pulp; semi-synthetic
Polyester(PET): wrinkle-resistant; PET bottles
Rubber: natural(latex); Vulcanization+sulphur makes tough(Goodyear 1839)
Cement: calcium silicates; Portland by Aspdin(1824)
Glass: amorphous; SiO2+Na2CO3+CaCO3; transparent, brittle
Biodegradable(paper,cotton) vs Non-biodegradable(plastic,glass)
Kevlar: strong synthetic fibre used in bulletproof vests; stronger than steel
Acrylic: synthetic fibre resembling wool; used in sweaters and blankets
Carbon fibre: lightweight, extremely strong; used in aircraft and sports equipment
Polystyrene (thermocol): excellent heat insulator; used in packaging and cups