polystyrene, cross-linked with 1.5% of divinylbenzene, 18-50 mesh 、
3-N,N-(dimethylamino)-1-propyl-N',N',N'-trimethylammonium chloride 、 alkaline earth salt of/the/ methylsulfuric acid 生成 polymer, substituted cross-linked polystyrene with 1.5% divinylbenzene, 18-50 mesh; monomers: p-ClCH2-styrene, 0.58 mol fraction; [p-(Cl(1-)*Me3N(1+)-(CH2)3-NMe2(1+)CH2)-styrene]Cl(1-), 0.37 mol fraction; styrene, 0.05 mol fraction