Self-organization of Gradient and Block Copolymers with Complexing Properties in Supercritical Co2
نویسندگان
چکیده
We report the synthesis of new gradient and block fluorinated copolymers, which have complexing properties and are soluble in supercritical carbon dioxide. Poly(1,1,2,2-tetrahydroperfluorodecyl acrylate-co-acetoacetoxyethyl methacrylate) (poly(FDA-co-AAEM)) and poly(1,1,2,2tetrahydroperfluorodecyl acrylate-co-vinylbenzylphosphonic acid diethylester) (poly(FDA-coVBPDE) were synthesized by reversible addition-fragmentation chain transfer (RAFT) polymerization in solvent medium. The cloud points of the copolymers in CO2 were measured in a variable volume view cell at temperatures between 25~65oC. It was found that the gradient copolymers are soluble in very mild conditions of pressure and temperature. Their self-organization was studied by small-angle neutron scattering (SANS) measurements.
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