反应详情

A 1 L four-necked flask was charged with 180 g of isopropyl alcohol (manufactured by Kishida Chemical Co., Ltd.), 370 g of ion exchanged water, 5 g of styrene (manufactured by Kishida Chemical Co., Ltd.), and 45 g of sodium styrene sulfonate (manufactured by Wako Pure Chemical Industries, Ltd.), and 7.2 g of 2,2′-azobis(2-methylpropionamidine)dihydrochloride (V-50, manufactured by Wako Pure Chemical Industries, Ltd.) was added as an initiator. Of this mixture, 101.4 g (20 wt % of the whole reaction liquid) was transferred to a 200 mL dropping funnel, and added dropwise over two hours at 83±2° C., further aged for two hours, and the solvent was thereafter removed under reduced pressure to give styrene/sodium styrene sulfonate copolymer (10/90 mol %) as white powder. The weight-average molecular weight of this copolymer was 7100.

1. additionwas added as an initiator
2. customOf this mixture, 101.4 g (20 wt % of the whole reaction liquid)
3. additionadded dropwise over two hours at 83±2° C.
4. customthe solvent was thereafter removed under reduced pressure