Polymers are commonly used both in synthetic threads and in plastics (where they can be either thermosetting polymers which have high cross branching - side branches actually connecting the chains - and will keep their shape during heating, or thermoplastics which have low cross branching and can be reshaped by applying heat). Common polymers and their uses are: | Polymers are commonly used both in synthetic threads and in plastics (where they can be either thermosetting polymers which have high cross branching - side branches actually connecting the chains - and will keep their shape during heating, or thermoplastics which have low cross branching and can be reshaped by applying heat). Common polymers and their uses are: |