Epichlorohydrin polystyrene anion reaction

Carbodi-imide-mediated reaction with epichlorohydrin-activated agarose previously treated with glycine Reaction with a syw-trichlorotriazine-activated polystyrene anion exchanger reaction with 1,4-benzoqumone-activated aminopropyl silica reaction with an N-hydroxysuccinimide ester derivative of 3-succinimidopropyl silica Carbodi-imide- or 2,4-toluenedi-isocyanate-mediated reaction with amino-or carboxy-aerosU... 

PSep% represents the actual weight percentage of polystyrene containing epoxy end group in the macromer. As shown in Table 1, it only amounts to 30-35%. This means that there existed also polystyrene not containing epoxy group. In combination with the above stated polystyrene with double molecular weight and the structure of epichlorohydrin and polystyrene anion, possible ways of the reaction between epichlorohydrin and the polystyrene anion may be postulated as follows ... 

Ring-opening reaction of epichlorohydrin with polystyrene anion... 

Effect of the amount of terminating agent epichlorohydrin on PSep% is somewhat similar to tetrahydrofuran, as shown in Figure 2. However, the order of adding epichlorohydrin affects the content of PSep significantly. Under the same reaction conditions, if epichlroohydrin is added to the toluene solution of polystyrene anion, the product contains only 18% PSep. 

Attempts were made to cap the polystyrene anion with ethylene oxide or 1,1-diphenylethylene, followed by reaction with epichlorohydrin. However, no better results were obtained. 

---