초록

Condensation polymerization followed by a supercritical extraction step can be used to obtain highly cross-linked nanoporous polymers with high surface area, controlled pore sizes and rigid structural integrity. The invention polymers are useful for applications requiring separation membranes.

대표청구항 ▼

[ What is claimed is:] [1.] A cross-linked nanoporous polymer prepared by a process comprising:(a) combining under polymerization conditions at least one aromatic monomer and a cross-linking agent chosen from the group of multifunctional acyl halides and benzylic halides;(b) allowing polymerization

[ What is claimed is:] [1.] A cross-linked nanoporous polymer prepared by a process comprising:(a) combining under polymerization conditions at least one aromatic monomer and a cross-linking agent chosen from the group of multifunctional acyl halides and benzylic halides;(b) allowing polymerization to occur until a copolymer gel is formed;(c) removing catalysts and unreacted monomers from said copolymer gel;(d) adding liquid carbon dioxide to said copolymer gel; and(e) removing said liquid carbon dioxide under supercritical conditions.