AM/MADQUAT反相微乳液聚合及共聚物的序列分布

Inverse Microemulsion Copolymerization of AM/MADQUAT and Sequence Distribution of the Copolymer

以丙烯酰胺(AM)、(2-甲基丙烯酰氧乙基)三甲基氯化铵(MADQUAT)为单体,以(NH4)2S2O8/NaHSO3为引发剂,在较低的单体浓度下采用反相微乳液聚合方法进行共聚.采用Kelen-Tüdos(简称K-T)法和Yezrielev-Brokhina-Roskin(简称YBR)法计算得出AM,MADQUAT的竞聚率分别为r1=0.63,r2=1.12.利用测得的竞聚率数据,通过计算机程序计算了共聚物的瞬时组成、平均组成,并研究了在反相微乳液中合成的共聚物的序列分布及平均序列长度.研究结果表明:AM/MADQUAT反相微乳液共聚合趋于无规共聚,共聚物在低转化率时瞬时其组成与平均组成吻合的相对较好.

Binary polymerizations of AM-MADQUAT by inverse microemulsion copolymerization with low monomer concentration and using （NH4）2S2O8/NaHSO3 as redox were studied. Reactivity ratios of AM/MADQUAT in inverse microemulsion have been calculated by the methods of Kelen-Tudos （K-T） and Yezrielev-Brokhina-Roskin（YBR）, being r1=0. 63 and r2= 1.12 respectively. Using the data of reactivity ratio, instantaneous composition, average composition, sequence distribution and average sequence length of the copolymers were calculated. The results indicate that the inverse microemulsion tends to random copolymerization, and that, at the early stage of the inverse microemulsion copolymerization, the instantaneous composition of the copolymers has a lower drift from average composition.