聚乙烯胺盐酸盐的溶液性质  

STUDY ON SOME PROPERTIES OF AQUEOUS SOLUTIONS OF POLY(VINYLAMINE) CHLORIDE

作　　者：胡志勇[1] 张淑芬[1] 杨锦宗[1] 

机构地区：[1]大连理工大学精细化工国家重点实验室,辽宁大连116012

出　　处：《高分子材料科学与工程》2004年第4期107-110,共4页Polymer Materials Science & Engineering

基　　金：国家自然科学基金资助项目(20076006)

摘　　要：利用聚丙烯酰胺的霍夫曼降级重排反应制备了六种聚乙烯胺盐酸盐,并对它们的水溶液性质进行了研究。聚乙烯胺盐酸盐水溶液的pH值随平均聚合度的变化并不明显,随着胺化度由55.65%升高到82.36%,其水溶液的pH值由3.96降低到2.67,聚乙烯胺盐酸盐的m值由3.65提高到5.50,pKa值由8.33降低到7.37;随着聚乙烯胺盐酸盐的平均聚合度由82.3增加到201.8,它的m值从5.13升高到5.58而pKa值则由7.48降低到了7.26;当聚乙烯胺盐酸盐的浓度小于5g/L时,溶液的比浓粘度急剧增加。Six Poly(vinylamine) Chlorides(PVAmHCl) were prepared by Hofmann degradation of polyacrylamide (PAM). Their behavior of dilute aqueous solutions have been compared, using viscosimetric, conductometric, and potentiometric measurements. Dilute aqueous solutions of PVAmHCl showed typical polyelectrolyte characteristics. All amino groups attached to the hydrocarbon main chain were protonated at pH ～4. With the increase of the amination degree of PVAm from (55%) to (78%), the acidity of the solution of PVAmHCl decreased from (3.96) to (2.67). The m value of PVAmHCl increased from (5.13) to (5.58) and pK_a decreased from (7.48) to (7.26) with the increase of the DPn from (81.3) to (201.8). At the same time, the m value increased from (3.65) to (5.14) and the pK_a value of PVAmHCl decreased from 8.33 to (7.47) with the increase of the amination degree of PVAm from (55%) to (78%). When the concentration of copolymer was lower than 5 g/L, reduced viscosity increased dramatically.

关 键 词：聚乙烯胺盐酸盐 溶液性质 聚电解质 粘度 

分 类 号：O633.21[理学—高分子化学]