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Citation: HO PING-LUM, TSIEN TING-PAO, PENG CHANG-CHIU, LEE SHU-LIEN, HOU WEN-TONG. THE PREPARATION AND DETERMINATION OF PROPERTIES OF ION EXCHANGE RESINS Ⅵ. HIGH POROSITY AND GOOD MECHANICAL STRENGTH OF POLYSTYRENE TYPE OF WEAKLY BASIC ANION EXCHANGE RESIN[J]. Acta Polymerica Sinica, ;1965, 7(3): 185-192. shu

THE PREPARATION AND DETERMINATION OF PROPERTIES OF ION EXCHANGE RESINS Ⅵ. HIGH POROSITY AND GOOD MECHANICAL STRENGTH OF POLYSTYRENE TYPE OF WEAKLY BASIC ANION EXCHANGE RESIN

Received Date: 7 November 1964

Beads were first prepared by the suspension copolymerization of styrene and divinyl-benzene in the presence of polystyrene．The swelling coefficient in toluene，apparent density，and percentage of porosity of the copolymer were then determined．The beads were later transformed into weakly basic anion exchange resins by the following methods：(1)The copolymer was chloromethylated and then reacted with tetraethylene-penta-amine．(2)The copolymer was nitrated and then reduced either by stannous chloride or by sodium polysulfide．From the experimental results，it was shown that the products obtained above possess higher exchange capacity，better mechanical property，and higher reaction rates for the in-troduction of ion exchange groups into the backbone structure than that obtained by the conventional method.
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