LCST, or ¿cloud point¿ is a property of some types of polymers in solution. At low temperatures, the polymers are fully solvated and exist as extended conformations in solution. At a certain critical temperature, the solvating interactions (usually with the polymer side chains) are overcome by the hydrophobic interactions that cause main chain (backbone) interactions and polymer chain collapse, hence the polymer chains aggregate and precipitate. The behaviour is interesting from a fundamental physico-chemical perspective, but also because such materials have great promise as drug-delivery systems and as components of active fluidic Microsystems (pumps, valves etc.). We propose to measure proton momentum distributions using Neutron Compton Scattering to investigate this phenomenon.