丙烯腈系大孔螯合树脂的合成及研究——Ⅰ.大孔PSA树脂的制备及结构研究

氰基树脂是氮配位及氮氧协同配位型螯合树脂的重要母体之一,也可制备专一性吸附树脂和弱酸树脂,故丙烯腈系大孔树脂的合成及结构研究具有一定的理论与实际意义。线型高分子致孔时可得更大孔径的树脂,但因丙烯腈(AN)的沉淀聚合特性,聚丙烯腈(PAN)不能用于丙烯腈系树脂的致孔。 本文选用线型聚苯乙烯(PS)、PS-环己

STUDIES ON THE MACRORETICULAR CHELATE RESINS --Study on the Structure for Macroreticular PSA Resins of Acrylonitrile System and Their Preparation

The macroreticular acrylonitrile-styrene-divinylbenzene copolymers (MR-PSA resins) have-been synthesized successfully by the suspension polymerization, using the linear polystyrene-(PS), linear pre-polystyrene (PPS) and mixture of PPS-cyclohexane as pore-creating agents. The morphological structure and porous structure of the MR-PSA resins have been studied by using scanning electron microscopy (SEM), BET method and density-bottle method. From the micrography and porous-parameters of the MR-PSA resins, we found: When the crosslink-ing degree is same, the morphological structure of the MR-PSA resins change from "gel-flake" into "gel-granule" with the increasing of the content of polymeric pore-creating agents applied, and their porous structures are improved in the meantime. The morphological structure and porous structure of the MR-PSA resins are also dependent on the sort of polymeric pore-creating system, PPS-cyclohexane is the best in the three sorts of polymeric pore-creating system used. The copolymeric compositions and other properties of the MR-PSA resins have been studied by the FT-IR, TG-DTG and Kjeldahod's method.