methods for preparation of functionalized polyvinylpyrrolidone with polymeπzablβ functions and amphipathic polydimethylsiloxane - pvp block copolymers a acrylated polyvinylpyrrolidone compound and a acrylamide - functionalized polyvinylpyrrolidone structures are disclosed the block copolymers are useful as biomaterial components in biomedical devices they provide improved wettability , lubricity , and material compatibility to the biomedical device , e g , ophthalmic lenses