What happens when thermosetting polymers are heated? - Material Science

Q.  What happens when thermosetting polymers are heated?
- Published on 05 Aug 15

a. They become soft
b. They are deformed
c. They become rigid
d. All of the above

ANSWER: They become rigid


  • Sravanthi   -Posted on 12 Oct 15
    • Thermosetting polymers when heated become hard and rigid and are opposite to thermoplastics. This phenomenon does not change by cooling because it is a characteristic of network molecular structures which are formed due to step-growth mechanism.

    • Fabrication temperature between 200° C and 300° C is used to remove thermosetting products from the mold, while thermoplastic products are cooled in molds to avoid distortion.

    • Thermosetting polymers have three-dimensional network of bonds i.e cross-linking hence are stronger than thermoplastic polymers.

    • Thermosetting polymers are more brittle and are not recycled because they have permanent shape.

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