摘要
测定了水溶性高分子聚乙二醇 (PEG10 0 0、PEG2 0 0 0、PEG60 0 0 )和聚乙烯吡咯烷酮(PVP -K30、PVP -K90 )对三种非离子表面活性剂十二烷基聚氧乙烯聚氧丙烯醚C12 H2 5O(EO) m(PO) nH (LS36,m =3,n =6;LS4 5,m =4 ,n =5;LS54,m =5,n =4 )浊点的影响。结果表明 ,聚乙二醇 (PEG)可使三种表面活性剂水溶液浊点降低 ;而聚乙烯吡咯烷酮 (PVP)随其浓度增加 ,表面活性剂溶液浊点先升高然后又下降 ;浊点下降程度与聚合物浓度和分子量有关。
The effects of poly(ethylene glycols) with different molecular weight (PEG1000, PEG2000, PEG6000) and polyvinylpyrrolidone with different polymerization degree (PVP-K30, PVP-K90) on the cloud point of nonionic surfactant dodecyl polyoxyethylene polyoxy propylene ether C 12 H 25 O(EO) m(PO) nH (LS36, m=3, n=6; LS45, m=4, n=5; LS54, m=5, n=4) were studied in the paper. It is found that a higher polymer concentration can result in a significant decrease on the cloud point of the aqueous surfactant solutions because of the formation of corona-shaped intra-chain micelles which indicate that the micelle-micelle interaction is attractive and can be expected to facilitate collisions among the micelles, as well as a slightly increasing at a lower PVP concentration because of the effects of viscosity, charge, and interaction between the polymer and surfactant.
基金
国家自然科学基金!资助项目 ( 2 990 30 0 6)&&
