Polymeric antioxidants

A method of inhibiting oxidation of a substance, comprising the step of contacting said substance with a polymer that includes repeat units represented by one or both of Structural Formula (I) and Structural Formula (II):

• wherein:
• R is —H or a substituted or unsubstituted alkyl, acyl or aryl group;
• Ring A is substituted with at least one tert-butyl group or substituted or unsubstituted n-alkoxycarbonyl group, and optionally one or more groups selected from the group consisting of —OH, —NH, —SH, a substituted or unsubstituted alkyl or aryl group, and a substituted or unsubstituted alkoxycarbonyl group;
• and
• Ring B is substituted with at least one —H and at least one tert-butyl group or substituted or unsubstituted n-alkoxycarbonyl group, and optionally one or more groups selected from the group consisting of —OH, —NH, —SH, a substituted or unsubstituted alkyl or aryl group, and a substituted or unsubstituted alkoxycarbonyl group;
• n is an integer equal to or greater than 2;
• and
• p is an integer equal to or greater than 0.