带功能基的全氟烷基乙烯基醚的研究 4: 四氟乙烯与全氟-3,6-二氧杂-4-甲基-Δ^7-辛基磺酰氟溶液共聚反应单体竞聚率的测定

本文报导了四氟乙烯与全氟-3,6-二氧杂-4-甲基-Δ^7-辛基磺酰氟溶液共聚反应单体竞聚率的测定。采用前文报导过的同一套测定竞聚率的实验装置, 在低转化率条件下进行溶液聚合, 分离得到磺酰氟型共聚产物, 经水解转成磺酸型后, 测定其交换容量值以求出共聚物的组成, 并将数据输入计算机程序, 求得TFE和PFMOS二单体的共聚竞聚率。     

氟碳改性聚丙烯酰胺共聚物的溶液性质

研究了氟碳链改性的聚丙烯酰胺水溶液性质及其对盐浓度的依赖性，重点考察 了氟碳疏水组分含量、盐浓度对特性粘数的影响，以及粘度随剪切速率和温度的变 化关系。结果表明聚合物溶液的粘度随盐的引入而增大，但在两种溶液中最小值对 应的共聚单体含量一致。随温度的增加，共聚物溶液粘度依次出现了最小和最大值 。所有实验结果均归于溶液中存在的疏水和氢键两种相反作用的综合结果。     

Effects of Ethylene Oxide Spacer Length on solution Properties of Water—Soluble Fluorocarbon—Containing Hydrophobically Associating Poly（Acrylic Acid—co—Rf—PEG Macromonomer）

Poly(acrylic acid)s (PAAs) modified with a series of fluorocarbon group (Rf) end-capped Poly(ethylene glycol) (PEG) macromonomers(number of ethylene oxide unit:1,9,23,45) and corresponding copolymers without fluorocarbon end groups were synthesized.It was found that the effect of the hydrophobic association of fluorocarbon groups on the solution viscosity prevailed over that of the hydrogen bond between grafted PEG and the backbone.Rheological measurement on the aqueous solutions of these poly(acrylic acid-co-Rf-PEG macromonomer) s demonstrated that the best thickening performance was shown when the number of ethylene oxide unit (EO number) was 23.     

Interaction of Fluorocarbon Containing Hydrophobically Modified Polyelectrolyte with Nonionic Surfactants

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