Gas hydrates present a significant problem to the petrochemical industry, with pipeline plugs imparting major financial and safety concerns. Gas hydrate crystallization is inhibited by polymers such as polyvinyl caprolactam. We are working with Ashland Inc who produce polyvinyl caprolactam and second generation inhibition polymers including a biodegradeable copolymer of vinyl caprolactam and vinyl alcohol to understand the mode of action of these polymers by studying they way they structure water in solution. We have previously performed a SANDALs experiment (RB1210090) using PVCap at the low concentration of 5% to overcome the significant challenges in fitting a polymer model using EPSR. We now propose to use this technique using higher concentration of PVCap and the new biodegradeable inhibitor to carry out experiements more sensitive to the polymer.