Biofouling, the accumulation of microorganisms, proteins, or bacteria on a wetted surface, concerns a wide range of applications including marine equipment. However, for marine equipment biofouling can be prevented with the use of polymer coatings. To investigate such coatings a visible light-mediated radical polymerization technique was employed to synthesize polymer brushes. This method allows for brush height to be determined by exposure time, brush growth to be spatially confined to exposed regions, high grafting density, and high degrees of polymerization. Specifically coatings possessing hydrophobic and/or hydrophilic properties, as exhibited in polyethylene glycol (PEG) and zwitterionic-based polymers, perform well in anti-fouling applications. Due to this our interest was in the shift of brush thermo-responsiveness when copolymerizing such monomers at varying ratios as well as post-functionalization of brushes to create zwitterionic polymer chains. Successful copolymerization of PEG and oligoethylene glycol (OEG) based monomers was accomplished, determining that the degree of polymerization is linearly correlated with the percent of OEG content. The consequent thermo-responsiveness of each polymer brush was ascertained by X-ray reflectivity swelling experiments. Additionally, post-functionalization on amine groups within the brush to create zwitterionic polymer chains was successful.