| Interaction of paraffin wax gels with ethylene/vinyl acetate copolymers (2005) | |||||||||||
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| Energy Fuels Interaction Paraffin Wax Gels with Ethylene Vinyl Acetate polymers Henry Ashbaugh Xuhong Guo Dietmar Schwahn Robert Prud homme Dieter Richter and Lewis Fetters Department Chemical Engineering Princeton University Princeton New Jersey Institute for Solid State Research Research Center Julich GmbH Julich Germany and School Chemical and Biomolecular Engineering Cornell University Ithaca New York Received April Revised Manuscript Received September The commercial grades ethylene vinyl acetate EVA polymers have found application pour point depressants refined fuels This study focuses their behavior additives crude oils where the intent reduce the yield stress the gels that can form when the oil exits the reservoir The model crude oils consisted wax decane EVA dosage levels ppm the reduction yield stress orders magnitude for the wax whereas the reduction order magnitude for and only fold for the wax This decrease efficiency with decreasing wax carbon number indicates that the EVA materials would not provide adequate reduction yield stress ensure against gelation pipeline transport Neutron scattering studies function temperature the self assembly the EVA polymers show dramatically different aggregated structures decane The EVA with the lowest ethylene content shows scattering that increases with power law exponent This scattering behavior typical for weakly aggregating polymer gels contrast the EVA with the higher ethylene content shows transition from surface scatterin | |||||||||||
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