Question

A plumber heats a plastic pipe, softens it, shapes it, and then lets it cool. After it is hardened, the

plumber realizes that the pipe needs to be bent to a greater angle. After reheating the pipe, the
plumber discovers that the pipe will no longer soften. The pipe material is most likely _____

1. thermoset
2. thermoplastic
3. solid wall
4. cellular core wall

Answer 1

thermoset

Step-by-step explanation:

A thermoset material is a polymer that is irreversibly hardened by curing. Curing is induced by heat and cannot be undone because the polymers cross link during the process, creating permanent chemical bonds.