Premium
Liquid–Liquid Extraction of 3FOx and 5FOx Polyoxetane Diols: Impact on Polyurethane Mechanical Properties, Surface Morphology, and Wetting Behavior
Author(s) -
Zhang Wei,
Henke Daniel,
Presnall David,
Chakrabarty Souvik,
Wang Chenyu,
Wynne Kenneth J.
Publication year - 2012
Publication title -
macromolecular chemistry and physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.57
H-Index - 112
eISSN - 1521-3935
pISSN - 1022-1352
DOI - 10.1002/macp.201200053
Subject(s) - oxetane , molar mass , polyurethane , polymer chemistry , cloud point , diol , contact angle , chemistry , wetting , polymerization , morphology (biology) , chemical engineering , extraction (chemistry) , materials science , organic chemistry , polymer , composite material , biology , engineering , genetics
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.