. . "l acetate), polystyrene, polybutadiene, poly(vinylpyrrolidone), and polymers of alkyl acrylates and methacrylates including copolymers incorporating acrylic or methacrylic acid as well as copolymers thereof; and polyesters, such as poly(ethylene glycol-co-isophthalic acid-co-terephthalic acid), poly(p-cyclohexane dicarboxylic acid-co-isophthalic acid-co-cyclohexylenebismethanol), poly(p-cyclohexan" . . . .