Question

1.
Define the term 'synthetic fibres'. Synthetic fiber is man made by
using chemical processes there are two types of synthetic fiber (1) thermoplastic (2) thermosetting plastic ​

Answer 1

Answer:

Synthetic fiber or synthetic fibre are fibers made by humans through chemical synthesis, as opposed to natural fibers that are directly derived from living organisms. They are the result of extensive research by scientists to improve upon naturally occurring animal and plant fibers.

Types:-Rayon , Polyester

denoting substances (especially synthetic resins) that become plastic on heating and harden on cooling, and are able to repeat these processes is called Thermoplastic.

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. Curing is induced by heat or suitable radiation and may be promoted by high pressure, or mixing with a catalyst.