https://doi.org/10.1351/goldbook.15309
Polymer composed of macromolecules consisting of a single-strand main chain and many ring units, each having one atom in common with the main chain.
Notes:
- A cardo polymer can be represented graphically as follows:

- A cardo polymer can also be defined as a polymer composed of macromolecules containing loop-like cyclic side groups, one ring atom of which is part of the backbone.
- The adjective "cardo" is derived from the Latin word for heart because the cyclic unit, together with adjacent parts of the main chain, resembles the shape of a heart with arteries.
Example:
