Opposite To the strategy of copolymer precursor, the modification with Alternative impregnation supposed the impregnating silica gel or sol inside the polymer solution to crank out a polymerization response. Some examples of polymers are styrene, epoxy resin, isocyanate, methyl methacrylate, etc., which can be used as a solution for impregnation https://tc-2345.mn.co/members/27727052