Diels-Alder graft polymers

A graft polymer represented by formula (II):

• ##STR12## wherein:
• R represents hydrogen or alkyl;
• R.sup.1 represents phenyl, alkyl substituted phenyl, chloro or bromo substituted phenyl, CO.sub.2 H, CO.sub.2 CH.sub.3, CO.sub.2 CH.sub.2 CH.sub.3, or C.tbd.N;
• X represents O, NH, NCH.sub.3, NCH.sub.2 CH.sub.3, NC(CH.sub.3).sub.3, NC.sub.6 H.sub.5, N-(p-Br)C.sub.6 H.sub.4, N-(p-CH.sub.3)C.sub.6 H.sub.4, N-[p-C(CH.sub.3).sub.3 ]C.sub.6 H.sub.4, or N-(p-CH.sub.3 O)C.sub.6 H.sub.4 ;
• the mole percent of the total recurring units designated by subscripts a+b+d equals 100 with a being a number from about 95 to about 99.5, b being a number from about 0.5 to about 5, and d being a number from 0 to about 45, with the proviso that if the recurring unit designated by subscript d is present, it is directly substituted for the recurring unit designated by the subscript a;
• the mole percent of the total recurring units designated by subscripts w+y+z equals 100, with w being a number from about 30 to about 55, y being a number from about 44.9 to about 55, and z being a number of from about 0.1 to about 15;
• and wherein at least 1 percent of the recurring units designated by the subscript b and at least 1 percent of the recurring units designated by the subscript z have been reacted to form a graft structure.

A graft polymer represented by formula (III):

• ##STR13## wherein:
• R represents hydrogen or alkyl;
• R.sup.1 represents phenyl, alkyl substituted phenyl, chloro or bromo substituted phenyl, CO.sub.2 H, CO.sub.2 CH.sub.3, CO.sub.2 CH.sub.2 CH.sub.3, or C.tbd.N;
• X represents O, NH, NCH.sub.3, NCH.sub.2 CH.sub.3, NC(CH.sub.3).sub.3, NC.sub.6 H.sub.5, N-(p-Br)C.sub.6 H.sub.4, N-(p-CH.sub.3)C.sub.6 H.sub.4, N-[p-C(CH.sub.3).sub.3 ]C.sub.6 H.sub.4, or N-(p-CH.sub.3 O)C.sub.6 H.sub.4 ;
• the mole percent of the total recurring units designated by subscripts a+b+d equals 100 with a being a number from about 95 to about 99.5, b being a number from about 0.5 to about 5, and d being a number from 0 to about 45, with the proviso that if the recurring unit designated by subscript d is present, it is directly substituted for the recurring unit designated by the subscript a;
• the mole percent of the total recurring units designated by subscripts w+y+z equals 100, with w being a number from about 30 to about 55, y being a number from about 44.9 to about 55, and z being a number of from about 0.1 to about 15;
• and wherein at least 1 percent of the recurring units designated by the subscript b and at least 1 percent of the recurring units designated by the subscript z have been reacted to form a graft structure.