The Thermosetting Polymers tend to have a cross-linked $3\mathrm{D}$ structure.

Bakelite or Novolac are examples of Thermosetting Polymer.

Polymer fibers are a subset of man-made fibers, which are based on synthetic chemicals (often from petrochemical sources) rather than arising from natural materials by a purely physical process. These fibers are made from: polyamide nylon.

Thermoplastics are a class of polymers that can be softened and melted by the application of heat, and can be processed either in the heat-softened state (e.g. by thermoforming) or in the liquid state (e.g. by extrusion and injection molding). polyvinyl chloride is an example of it.

Elastomer, any rubbery material composed of long chainlike molecules, or polymers, that are capable of recovering their original shape after being stretched to great extents - hence the name elastomer, from "elastic polymer."

Neoprene is elastomer

Nylon-$6,6$ is fiber

PVC is thermoplastic

Novolac is thermosetting