Question

Name the plastic used for making non-stick pans:
A. PVC
B. Teflon
C. Bakelite
D. Melamine

Answer 1

Hint: We have to remember that the properties of polymers depend on their structure. The plastic that is used for making non-stick pans is a synthetic thermoplastic polymer, of tetrafluoroethylene that has various applications. The plastic used also has high resistance to heat.

Complete answer:
Let’s first study about details of the polymers as,
We must remember that the polymers are substances or materials made up of very large molecules or macromolecules made up of many repeating subunits. Due to their diverse properties, synthetic and natural polymers play an important and ubiquitous role in everyday life.
The properties of polymers depend on their structure and are divided into classes according to their physical basis.
1. Polyvinyl chloride (PVC) -It is a polymer of monomer vinyl chloride Polyvinyl chloride is the third most common synthetic plastic polymer (after polyethylene and polypropylene , PVC is a thermoplastic polymer. PVC has high hardness and mechanical properties. Mechanical increases with increasing molecular weight, but decreases with increasing temperature.
Uses of PVC- It is used in manufacture of rain coats, vinyl flooring, handbags, water pipes. Therefore, the option A is incorrect.
2. Teflon (Polytetrafluoroethylene) -Teflon is manufactured by heating tetrafluoroethene with a free radical or per sulphate catalyst at high pressures.
Uses of Teflon-Teflon are used for making non-stick surface coated utensils and in making oil seals and gaskets. Therefore, the option B is correct.
3. Bakelite- It is a thermosetting phenol formaldehyde resin, which is formed by the condensation reaction of phenol with formaldehyde.
Use of Bakelite-Bakelite's properties make it particularly suitable as a moulding compound, adhesive or binder, varnish and protective coating. suitable because of its very high resistance to the effects of electricity, heat and chemistry, especially for the rising electrical and automotive industries. Bakelite is used for making phonograph records, fountain pens, combs and electrical switches. Therefore, the option C is incorrect.
4. Melamine- Melamine formaldehyde (also called melamine or MF) is a tough, highly durable and universal thermoset aminoplast with good fire and heat resistance. It is made by condensing two monomers melamine and formaldehyde. Good fireproof properties are due to the release of nitrogen gas during combustion or combustion.
It is used in the manufacturing of unbreakable crockery.
Therefore, the option D is incorrect.

So, the correct answer is Option B.

Note: As we know that PTFE is used as a non-stick coating for pans and other cooking utensils because it does not react, partly due to the strength of the carbon-fluorine bond, so it is widely used in containers and pipelines for reactive and corrosive chemicals. When used as a lubricant, PTFE reduces engine friction, wear and energy consumption. It is usually used as a graft in surgical procedures. It is also widely used as a coating on catheters; this affects the ability of bacteria and other infectious agents to adhere to the catheter and causes hospital-acquired infections.