6533b7d9fe1ef96bd126d5e0

RESEARCH PRODUCT

Kinetics of block-copolymer aggregation in super critical CO2

Milos SteinhartJoseph M. DesimoneSharon L. WellsRoberto TrioloHeinz AmenitschPappannan ThiyagarajanF. Lo CelsoFabio TrioloAlessandro Triolo

subject

Work (thermodynamics)Materials scienceSmall-angle X-ray scatteringKineticsThermodynamicsNeutron scatteringCondensed Matter PhysicsKinetic energySynchrotronSupercritical fluidElectronic Optical and Magnetic Materialslaw.inventionlawPolymer chemistryMaterials ChemistryCeramics and CompositesCopolymer

description

Small angle X-ray and neutron scattering (SAXS and SANS) are used to obtain structural information on the aggregation behavior of block-copolymers dissolved in supercritical CO2. The SANS technique is used to provide a detailed structural model for the micellar aggregates, which form below the critical micellization density (CMD), that we defined in our previous work. The SAXS technique (with a synchrotron source) is used to provide the first experimental information concerning the kinetic features of both formation and decomposition of such aggregates as soon as pressure jumps are applied to the solutions across the CMD. 2002 Elsevier Science B.V. All rights reserved.

yearjournalcountryeditionlanguage
2002-09-01Journal of Non-Crystalline Solids
https://doi.org/10.1016/s0022-3093(02)01553-3