Kinetics of aggregate formation in solutions of PNIPAM - pressure and temperature jumps across the coexistence line
Poly(N-isopropylacrylamide) (PNIPAM) is a thermoresponsive polymer which, in water, collapses at the cloud point with lower critical solution temperature behavior and subsequently forms large aggregates. In the temperature-pressure frame, the coexistence line follows an elliptical curve with a maximum at 60 MPa. At high pressure, the aggregation mechanism is fundamentally different from the one at atmospheric pressure, which we attribute to a difference in interactions. Pressure jumps at various pressures allow the investigation of early kinetics in the formation of aggregates, due to the fast response of the experimental set-up with respect to temperature jumps. We wish to study the aggregate formation using time-resolved SANS during pressure and temperature jumps at D22 or D33.
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PAPADAKIS Christine; Leonardo Chiappisi; JUNG Florian; NIEBUUR Bart-Jan; SCHULTE Alfons and ZHANG Xiaohan. (2017). Kinetics of aggregate formation in solutions of PNIPAM - pressure and temperature jumps across the coexistence line. Institut Laue-Langevin (ILL) doi:10.5291/ILL-DATA.9-11-1827
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