in how many classes plastic are divided
Answers
Answer:
Two
Explanation:
Plastics are divided into two distinct groups: thermoplastics and thermosets.
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Explanation:
THERMOSETTING PLASTICS 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. Curing is induced by heat or suitable radiation and may be promoted by high pressure, or mixing with a catalyst. he : melamine, bakelite
THERMOPLASTICS. thermoplastic is a material, usually a plastic polymer, which becomes more soft when heated and hard when cooled. Thermoplastic materials can be cooled and heated several times without any change in their chemical or mechanical properties. When thermoplastics are heated to their melting point, they melt to a liquid.
ex: pvc