主权项 |
1. A polymer comprising units of the formulaand salts thereof, wherein
z is 0, 1, or 2, and R is H, a substituted or unsubstituted C1-C18 alkyl, a substituted or unsubstituted C2-C18 alkenyl, a substituted or unsubstituted C2-C18 alkynyl, a substituted or unsubstituted C3-C18 cycloalkyl, a substituted or unsubstituted C1-C18 haloalkyl, a substituted or unsubstituted C2-C18 heterocycloalkyl, a substituted or unsubstituted C6-C18 aryl, a substituted or unsubstituted C7-C18 arylalkylene, or a substituted or unsubstituted C3-C18 heteroaryl, R′ is H or R′ together with R forms a substituted or unsubstituted C2-C18 heterocycloalkyl, or substituted or unsubstituted C2-C18 heteroaryl group, each having 5 to 8 ring members. |