Question

Which of the following polymers can be used for lubrication and as an insulator?

• A. SBR
• B. PVC
• C. PTFE
• D. PAN

Hint:

PTFE (Teflon) = low friction (lubrication) + high electrical resistance (insulator).

Answer 1

The Correct Option is C

The question asks which polymer among the given options can be used for lubrication and as an insulator. Let's analyze each of the options:

1. SBR (Styrene-Butadiene Rubber):
   SBR is a synthetic rubber that is widely used in tire manufacturing, seals, and gaskets. While it has excellent abrasion resistance and elasticity, it is not commonly used for lubrication or as an electrical insulator.
2. PVC (Polyvinyl Chloride):
   PVC is a plastic commonly used in construction, pipes, and cable insulation due to its durability and chemical resistance. It is an insulator but not suitable for lubrication purposes.
3. PTFE (Polytetrafluoroethylene):
   PTFE, commonly known as Teflon, is a polymer with excellent chemical resistance and a very low coefficient of friction, making it an excellent lubricant. Additionally, PTFE is an outstanding electrical insulator, which makes it suitable for applications requiring insulation.
4. PAN (Polyacrylonitrile):
   PAN is primarily used in the production of acrylic fibers and as a precursor for carbon fibers. It is not known for lubrication applications or as an insulating material.

Based on the properties discussed for each polymer, PTFE is uniquely suited for both lubrication due to its low friction and as an electrical insulator due to its resistance to electricity. Thus, the correct answer is PTFE (Polytetrafluoroethylene).