Liquid-Liquid Extraction of 3FOx and 5FOx Polyoxetane Diols: Impact on Polyurethane Mechanical Properties, Surface Morphology, and Wetting Behavior

被引：7

作者：

Zhang, Wei ^{[1
]}

Henke, Daniel ^{[1
]}

Presnall, David ^{[1
]}

Chakrabarty, Souvik ^{[1
]}

Wang, Chenyu ^{[1
]}

Wynne, Kenneth J. ^{[1
]}

机构：

[1] Virginia Commonwealth Univ, Dept Chem & Life Sci Engn, Richmond, VA 23284 USA

来源：

MACROMOLECULAR CHEMISTRY AND PHYSICS | 2012年 / 213卷 / 12期

基金：

美国国家科学基金会;

关键词：

fluorous soft blocks; liquid-liquid extraction; polyoxetanes; polyurethanes; surface science; PARTIALLY FLUORINATED ISOCYANATES; SOFT BLOCKS; CONTACT ANGLES; SIDE-CHAINS; HYSTERESIS; COPOLYMERS; MODIFIERS; FILMS; POLYMERIZATION; MONOMER;

D O I：

10.1002/macp.201200053

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

Laboratory prepared and commercial poly(2-2,2,2-trifluoroethoxy-2-methyl)oxetane, P[3FOx] and poly(2-2,2,2-pentafluoropropoxy-2-methyl)oxetane, P[5FOx] polyols contain varying amounts of cyclics and low molar mass (LMW) constituents as byproducts of ring opening polymerization. Guided by phase diagrams determined by cloud point measurements, P[3FOx] diol separation is achieved. The impact of purification is explored via the preparation of P[3FOx] and P[5FOx] polyurethanes from cyclic/LMW-free diols. Mechanical properties are improved because of higher polyurethane molecular weights. AFM revealed complex rugosity that is correlated with dynamic contact angles free from effects of water contamination.

引用

页码：1225 / 1238

页数：14