give reason that why thermosetting plastics can be moulded into shape only once
Answers
Answer:
A thermosetting polymer, resin, or plastic, often called a thermoset, is a polymer that is irreversibly hardened by curing from a soft solid or viscous liquid prepolymer or resin.[1]Curing is induced by heat or suitable radiationand may be promoted by high pressure, or mixing with a catalyst. It results in chemical reactions that create extensive cross-linkingbetween polymer chains to produce an infusible and insoluble polymer network.
The starting material for making thermosets is usually malleable or liquid prior to curing, and is often designed to be molded into the final shape. It may also be used as an adhesive. Once hardened, a thermoset cannot be melted for reshaping, in contrast to thermoplastic polymers which are commonly produced and distributed in form of pellets, and shaped into the final product form by melting, pressing, or injection molding
Answer:
Explanation:
its a cross linkage polymer