A composition comprising a hydrocarbon polymer having attached thereto pendant groups Aa and Bb wherein each A is independently selected from members of the group consisting of: groups of the formula and each B is independently selected from members of the group of formula: wherein each X is independently O, S, or NRb, and each Z is independently a group of the formula Ra is an ethylene group, a propylene group, which groups optionally have hydrocarbyl or hydroxyhydrocarbyl substituents, or wherein J is H, SH, NH2, or OH, and tautomers thereof; a is 0 or a number ranging from 1 to about 50, and b is a number ranging from 1 to about 30; wherein each of the groups is defined in greater detail herein.