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- Title
A Polyurethane Surface Modifier: Contrasting Amphiphilic and Contraphilic Surfaces Driven by Block and Random Soft Blocks Having Trifluoroethoxymethyl and PEG Side Chains.
- Authors
Zhang, Wei; Fujiwara, Tomoko; Taşkent, Hűmeyra; Zheng, Ying; Brunson, Kennard; Gamble, Lara; Wynne, Kenneth J.
- Abstract
A conventional MDI-BD-PTMO polyurethane is modified using 2 wt% polyurethanes (U) having copolyoxetane soft blocks with hydrophobic 3F, CF3CH2OCH2- and hydrophilic MEn, CH3O(CH2CH2O)nCH2-, n = 3, 7) side chains. In contrast to neat 3F- co-MEn-U, 2 wt% 3F- co-MEn-U compositions have physically stable morphologies and wetting behavior. Surface composition (XPS) and amphiphilic or contraphilic wetting are controlled by the 3F- co-MEn polyoxetane soft block architecture and MEn side chain length. Importantly, θrec can be tuned for 2 wt% 3F- co-MEn-U compositions independent of swelling, which is controlled by the bulk polyurethane. AFM imaging leads to a new morphological model whereby fluorous/PEG-hard block nanoaggregates combine to form near surface features culminating in micron-scale texturing.
- Publication
Macromolecular Chemistry & Physics, 2012, Vol 213, Issue 14, p1415
- ISSN
1022-1352
- Publication type
Article
- DOI
10.1002/macp.201200075