1. Name any two man-made fibres.
2. What is rayon? Mention two of its properties.
3. What are the main properties of nylon that make it so useful?
4.what is perspex? mention its two properties.
5.What are the major properties of teflon that makes it so useful?
6.what does PTFF stands for? give one use of it.
Answers
Answer:
1. (a) Synthetic Fibre (b) Nylon
Answer:
1. Nylon, Acrylic
2. Rayon is a manufactured regenerated cellulosic fiber. It is also a man made fibre. It is moisture absorbent. It also does not build up static electricity.
3. i.Better weathering properties; better sunlight resistance
ii. High melting point (256 °C, 492.8 °F)
4. Solid transparent plastic made of polymethyl methacrylate (the same material as Plexiglas or Lucite). It is used in home repairs and general DIY.
5. i. High electric resistance
ii. Water resistant
6. Polytetrafluoroethylene
Polytetrafluoroethylene (PTFE) is a Fluoropolymer that has a large number of industrial applications because of its many properties. One brand name for PTFE is Teflon, which is well-known for its non-stick and heat-resistant properties. It is used to make non stick cooking pans.
(Sorry friend but you wrote PTFF, which is wrong. If you want to know the meaning of PTFF, it is Port Townsend Film Festival.)
Hope this helps you.