Polyradies | Polyster | Formaldehyde Resins

With Formaldehyde

Formaldehyde is used:

Formaldehyde to ethanol

Melamine formaldehhyde resin is

Formaldehyde to n-butane

Elastomers/Fibres || Thermoplastics and Thermosetting Polymers || Nylon || Bakelite || Melamine Formaldehyde Resin || Biodegradable Polymer

Which of the following polymers soften on heating and harden on colling? What are the polyfmers with this property collectively called ? What are the structural similarites between such polymers? Bakelite urea formaldehyde resin , polythene, polyvinyls, polystyrene.

Ethylene to formaldehyde