含有机胺超交联多孔聚合物的制备与表征

摘要

以乳液聚合将苯乙烯，丙烯酸丁酯，二乙烯基苯进行共聚，获得低交联度单分散性前体纳米颗粒，用二甲氧基甲烷作外交联剂对前体纳米颗粒进行Friedel⁃Crafts反应，获得超交联多孔聚合物，最后对聚合物进行胺解制备有机胺型多孔聚合物。通过动态光散射纳米粒度分析仪（ DLS）、傅立叶红外光谱仪（ FT IR）、比表面积和孔径分析仪、扫描电子显微镜（ SEM）、热重分析仪（ TGA）表征了乳液聚合物前体的性能以及超交联后聚合物的结构、孔性质以及热稳定性。结果表明，所得聚合物具有较大内表面积，热稳定性随着含氮量的增大而增大，但是比表面积逐步减小。%Styrene, butyl acrylate, and divinylbenzene are copolymerized by emulsion polymerization, and low crosslinking precusor nano particles of monodispersity are obtained, formaldehyde dimethyl acetal is employed as an external crosslinker to conduct the Friedel⁃Crafts reaction afterwards, the final product⁃porous hypercrosslinking polymers are prepared by aminolysis and cyclization. Properties of precursors, structure and pore properties, thermostability of the materials are studied by the dynamic light scattering ( DLS ) , Fourier transform infrared spectrometry( FT⁃IR) , surface and pore analysis, scanning electron microscope( SEM) , and thermogravimetric analysis( TGA) . The results shows that the thermostability of the materials increase with the growth of nitrogen content, meanwhile, the surface area decreases.