Synthesis of 3,6-dioxa-Δ7-4-trifluoromethyl perfluorooctyl trifluoromethyl sulfonimide: bis[(perfluoroalkyl)sulfonyl] superacid monomer and polymer
作者:Brian H Thomas、Gregory Shafer、Jing Ji Ma、Ming-Hu Tu、Darryl D DesMarteau
DOI:10.1016/j.jfluchem.2004.05.009
日期:2004.8
A new type of ion exchange polymer, bis[(perfluoroalkyl)sulfonyl]imide ionomers (PFSI), were developed by the copolymerization of sodium 3,6-dioxa-Δ7-4-trifluoromethyl perfluorooctyl trifluoromethyl sulfonimide with tetrafluoroethylene (TFE) using an aqueous redox initiation system in an emulsion type polymerization. These polymers have been prepared in various equivalent weights and processed into
A Lewis acid catalyst composition comprising a specific mixed medium and a Lewis acid catalyst, wherein the Lewis acid catalyst is at least one compound selected from the group consisting of compounds respectively represented by the following formulae (1) and (2):
[(R
f
1
SO
2
)(R
f
2
SO
2
)N]
n
M (1), and
[(R
f
1
SO
2
)(R
f
2
SO
2
)(R
f
3
SO
2
)C]
n
M (2).
A method for continuously performing a reaction which proceeds in the presence of the above-mentioned Lewis acid catalyst by using a specific mixed medium and the above-mentioned Lewis acid catalyst. A novel Lewis acid catalyst.