If the structure consists of more than one repeating unit (mon, mer) or structural repeating unit, Copolymer (co) brackets/groups can be used to represent the structure.
Copolymers might contain crossing bonds and star atoms.
The following copolymers can be drawn:
Block (blk) - with or without junction unit
Copolymer to represent modified polymers (mod)
Copolymer to represent grafted polymers (grf)
Copolymer to represent cross-linked polymers (xl)
See the figure below for an example.
Create the components to form the copolymer.
Click the Create Group tool on the toolbar then select the components to be included.
In the Create Group dialog window, choose one of the following types:
Copolymer, alternating (alt)
Copolymer, block (blk)
Copolymer, statistical (stat)
Draw the sub-polymer to add outside of the bracket.
Select the sub-polymer to be deleted.
Press the Delete button on your keyboard or delete it with the Erase tool.