Which of the following are characteristics of thermosetting polymers? (i) Heavily branched cross-linked polymers. (ii) Linear slightly branched long-chain molecules. (iii) Become infusible on moulding so cannot be reused. (iv) Soften on heating and harden on cooling, can be reused.

contexto.130

3 years ago

Option (i) and (iii) are the answers.

Thermosetting polymers have a lot of branching cross links. They can’t be used again since they don’t melt when heated and can’t be remoulded.