AM-AHPTAC共聚及其竞聚率测定

Copolymerization and Determination of Reactivity Ratio of Acrylamide and 3-acryloxy-2-hydroxypropyl-trimethylammonium Chloride

以3-丙烯酰氧基-2-羟丙基三甲基氯化铵(AHPTAC)与丙烯酰胺(AM)为单体,以(NH_4)_2S_2O_8-NaHSO_3作引发剂,在40℃水中通过溶液聚合法合成了阳离子共聚物,并通过IR、~1H-NMR对其结构进行了表征。采用AgNO_3滴定方法,测定了共聚物的阳离子度,然后用截距斜率法(Fineman-Ross法)测得AM、AHPTAC两单体的竞聚率分别为r_1=10.90,r_2=0.14;直线交叉法测得AM、AHPTAC竞聚率分别为r_1=10.94±0.20,r_2=0.15±0.04。

Using 3-acryloxy-2-hydroxypropyl-trimethylammonium chloride （AHPTAC） and acrylamide （AM） as raw materials, the cationic copolymer was synthesized in aqueous solution at 40℃ with ammonium persulfate and sodium hydrogen sulfite as redox initiators. The structure of the cationic copolymer was identified by IR and ^1H-NMR. The cationic density of cationic eopolymer was determined by AgNO3 solution titration. Monomer reactivity ratios r~, r2 for AM and AHPTAC were,respectively, r1 = 10.90,r2 =0. 14 by the Fineman-Ross method; r1 = 10.94±0.20,r2 =0.15 ±0.04 by the method of point of intersection.