180) Thermoplastic materials are those materials which
do not become hard with the application of heat and pressure and so chemical change occurs
Related Engineering Materials MCQ with Answers
formed by condensation polymerization
Thermosetting plastics are formed by condensation polymerization, whereas thermoplastics are plastic polymer substances formed by the addition polymerization process. Thermosetting plastics become permanently hard on the application of heat but do not soften on further heating.