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Sunday, 27 May 2018

Which of the following is a true statement for thermoplastic polymers?

  By GK Planet Team       Sunday, 27 May 2018
Q. Which of the following is a true statement for thermoplastic polymers?
  1. Are more brittle and poorer in impact than thermosets 
  2. Are stronger and stiffer than thermosets 
  3. The recyclable plastics are of this type 
  4. Heating after curing will result in charring or burning
Answer: C

Q. The following is a true for thermoplastic polymers.
  1. They can be softened by heat and pressure.
  2. They can be reshaped.
  3. Polypropylene is a thermoplastic polymer.
  4. All the statements are true
Answer: D

Thermoplastic Polymer


A thermoplastic is a material, usually a plastic polymer, which becomes soft when heated and hard when cooled. Thermoplastic materials can be cooled and heated several times without any change in their chemistry or mechanical properties. When thermoplastics are heated, they melt to a liquid. They freeze to a glassy state when cooled enough.

Thermoplastic materials have many features. Some products made from thermoplastic materials are used for electronic applications. They protect against electrostatic discharge and radio frequency interference. Thermoplastics are one of the main two types of plastics.

Thermoplastic can be molded into any shape. Thermoplastics differ from thermosetting polymers. Thermosets form irreversible chemical bonds during the curing process. The most produced plastics are:
  1. Polyethylene (PE)
  2. Polypropylene
  3. Polyvinyl chloride (PVC)
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