Meaning : A material that softens when heated and hardens again when cooled.
Synonyms : thermoplastic resin
Meaning : Having the property of softening or fusing when heated and of hardening and becoming rigid again when cooled.
Example :
Thermoplastic materials can be remelted and cooled time after time without undergoing any appreciable chemical change.
Having the property of becoming permanently hard and rigid when heated or cured.
The phenol resins and plastics were the original synthetic thermosetting materials.