| New chemical industry material including functional polymer is already considered as a currently underlying developing region in technical innovation, exploitation, and industrialization of Chinese chemical industry. This paper firstly demonstrates the classification of chemical functional polymer and development history of functional polymer, then, reaches a general evaluation on the application of the important supporter--chloromethylated polystyrene, a kind of functional polymer and its preparation, existing problems, methods of improvement, and alternative. Commonly, chloromethylated polystyrene is attained through the reaction between polystyrene and chloromethyl methyl ether (CME) or bis(chloro-methyl) ether (BCME) in the presence of catalysts such as Lewis acid. However, CME and BCME are carcinogenic compounds. Furthermore, Friedel-Crafts alkylating reaction also brings by-reactions such as secondary cross-link and multi-substitution. So it is necessary to improve the common method or to find an alternative one. In the second chapter, the paper reports the preparation of monodisperse chloracetylated polystyrene through Friedel-Crafts acylating reaction of strene-divinylbenzene copolymers. The structure of chloracetyl group is similar to that of chloromethyl group so that they have similar conjugated systems. In addition, carcinogenic compounds, such as CME, BCME are no longer necessarily needed in this process; acylated reagents used in its process are cheap and easily available; multi-substitution does not have a chance to appear during electrophilic substitution reaction and secondary cross-link in chloromethylated reaction will be eliminated since acetylated groups cause the passivation of the phenyl groups; the reaction condition is gentle and the operation is safe, simple, economical so that it is an ideal reaction method. As for different applications, different loadings of functional groups are needed. So it is very important to know how to get the desired loading. The paper describes how to attain chloracetylated polystyrene with the specific loading below the maximum loading and control the loading of functional supporter by adding certain amount of catalyst or acylated reagent, which is attained by caculating substitution value of chloroacetyled polystyrene.In addition, in this paper, reaction conditions, such as reagent solvents,solvent amounts,reaction time,particle diameter of polystyrene,type of polystyrene were optimized and the mechanism of Friedel-Crafts acylated reaction was briefly investigated. In the third chapter, the method for preparing tertiary ammonium anion exchange resin that is through amination reaction between chloracetylated polystyrene and diethylamine. Safe materials,simple process,decent activity of chloroacetyl group all help to achieve high conversion rate and avoid by-reaction—hydrolyzation as bromoacetyl group so that this method is considered a relative ideal one for preparing ammonium resin. In the paper, reaction conditions such as solvent amount,material ratio ,reaction temperature ,reaction time were analyzed and optimized by mathematical software Statistica 6.0 and optimal reaction condition was finally attained. In the forth chapter, reaction conditions on the preparation of quaternary ammonium strong base anion exchange resin were investigated and both optimal reaction condition and high exchange capacity up to 3.60 mmol/g were achieved. In the last part, the applications of chloracetylated polystyrene were investigated in this paper. L-phenylalanine-polystyrene ligand exchange chromatogram can be attained by using L-phenylalanine-polystyrene chelated resin based on chloracetylated polystyrene to chelated Cu2+. Moreover, chelated reaction conditions were optimized and effects such as relative dynamics parameters,pH were investigated.
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