TECHNOLOGY FOCUS - POLYMERS - Preparation: No preparation method is given. Preferred Components: The pendent hydrophobic group is 5-20C hydrocarbyl, or 5-20C hydrocarbyloxy (both optionally partially or perfluorinated), preferably 5-20C perfluorinated hydrocarbyl. The pendent proton transfer group is hydroxy, imidazolyl, (1,2,3)triazol-4-yl, benzimidazolyl, benzotriazolyl (preferred), phosphono, sulfo or carboxy group. The linking group is 3-10C aliphatic divalent group. The repeating units are: substituted polystyrene units of formula (III), preferably poly(6-(3-decyloxy-5-vinyl-phenoxy)-hexanoic acid (1H-benzotriazol-5-yl)-amide) or poly(6-(3-decyloxy-5-vinyl-phenoxy)-hexanoic acid (2-(1H-imidazol-4-yl)-ethyl)-amide); substituted polysilane units of formula (-(Si(Y1)(L-X))-) (IV); substituted polysiloxane units of formula (-(Si(Y1)(L-X)-O)-) (V); substituted poly(phenoxy) units of formula (VI)-(IX); substituted poly(quinoxaline) units of formula (X); substituted poly(phenoxy) units of formula (XI); substituted poly(phenylthio) units of formula (XII); substituted poly(2-biphenyl-4-yl-pyrrolo(3,4-f)isoindole-1,3,5,7-tetraone) units of formula (XIII); substituted poly(2-(4-phenoxy-phenyl)-pyrrolo(3,4-f)isoindole-1,3,5,7-tetraone) of formula (XIV); substituted poly(urea) units of formula (XV) or (XVI); or substituted poly(carbamate) units of formula (XVII) or (XVIII). In the random copolymer, the first repeating unit is poly(3,5-bis-decyloxy-styrene), and the second repeating unit is poly(6-(3-(5-(1H-benzotriazol-5-ylcarbamoyl)-pentyloxy)-5-vinyl-phenoxy)-hexanoic acid (1H-benzotriazol-5-yl)-amide) or poly(6-(3-(5-(2-(4,5-dihydro-1H-imidazol-4-yl)-ethylcarbamoyl)-pentyloxy)-5-vinyl-phenoxy)-hexanoic acid (2-(4,5-dihydro-1H-imidazol-4-yl)-ethyl)-amide).Z = -C(=O)- or -S(=O)2-; andR1 = 1-6C alkyl. EXAMPLE - A mixture of 6-(3-decyloxy-5-vinyl-phenoxy)-hexanoic acid ethyl ester (1.25 g) and alkoxyamine (0.0162 g) were degassed, sealed under argon, and heated at 125 degrees C under argon for 12 hours. The reaction mixture was allowed to cool. The solidified reaction mixture was then dissolved in dichloromethane and precipitated into methanol/water mixture. The precipitate was then collected by vacuum filtration and dried to give poly(6-(3-decyloxy-5-vinyl-phenoxy)-hexanoic acid ethyl ester) (A1). To a solution of A1 (1 g) in tetrahydrofuran (THF) (30 ml) was added aqueous potassium hydroxide (1.34 g) dissolved in water (4 ml). Methanol (12 ml) was then added to this two-phase system to give a homogeneous solution. This mixture was then refluxed for 12 hours. The reaction mixture was evaporated to dryness and the residue was dissolved in water (20 ml) and then heated at reflux for another 24 hours. After cooling, the reaction mixture was acidified with 2N hydrochloric acid. The precipitate formed was collected by vacuum filtration and dried to give poly(6-(3-decyloxy-5-vinyl-phenoxy)-hexanoic acid) (A2). A2 (390 mg) was dissolved in a solvent mixture of dry dimethylformamide (2 ml) and dry THF (20 ml). To this solution, triethylamine (0.2 ml) was added. This mixture was kept in ice bath and stirred for 10 minutes. Ethyl chloroformate (130 mg) was then added into the reaction mixture in ice bath and stirred for 30 minutes. The reaction mixture was then removed from ice bath and stirred at room temperature for another 30 minutes. White precipitates were filtered and the filtrate was then added into a solution of 5-amino-1H-benzotriazole (161 mg) in dry THF (10 ml). This reaction mixture was further stirred for 30 hours. Solvents of the reaction mixture were then reduced by rotary evaporation until solution became viscous to give precipitate of poly(6-(3-decyloxy-5-vinyl-phenoxy)-hexanoic acid (1H-benzotriazol-5-yl)-amide) (415 mg, 82%).