High Modulus, Low Surface Energy, Photochemically Cured Materials from Liquid Precursors

A new strategy has been developed to achieve durable, low surface tension fluorinated polymeric materials by copolymerizing a tetramethacryloxy-modified perfluoropolyether (PFPE) macromonomer and a fluorinated difunctional cross-linker, 1H,1H,6H,6H-perfluoro-1,6-hexyl diacrylate (PFHDA), into very h...

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Bibliographic Details
Published inMacromolecules Vol. 43; no. 24; pp. 10397 - 10405
Main Authors Hu, Zhaokang, Pitet, Louis M, Hillmyer, Marc A, DeSimone, Joseph M
Format Journal Article
LanguageEnglish
Published Washington, DC American Chemical Society 28.12.2010
Subjects
Applied sciences
Exact sciences and technology
Physicochemistry of polymers
Polymerization
Polymers and radiations
Acrylic acid ester
Organic isocyanate
Methacrylic acid esters
Fluorine containing copolymer
Mechanical properties
Composition effect
Ether copolymer
Experimental study
Molecular relaxation
Carbamoylation
Crosslinked copolymer
Chemical modification
Wettability
Morphology
Preparation
Surface properties
Acrylate copolymer
Prepolymer
Methacrylate copolymer
Transparent material
Aliphatic copolymer
Photochemical copolymerization
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Summary:A new strategy has been developed to achieve durable, low surface tension fluorinated polymeric materials by copolymerizing a tetramethacryloxy-modified perfluoropolyether (PFPE) macromonomer and a fluorinated difunctional cross-linker, 1H,1H,6H,6H-perfluoro-1,6-hexyl diacrylate (PFHDA), into very highly cross-linked materials that possess a very high modulus as well as a very low surface energy. The miscibility of the two fluorinated components has been studied by measuring the cloud-point temperatures. Partially miscible mixtures yielded optically transparent samples after curing at low PFHDA contents (e.g., <40 wt %), and cloudy samples were obtained at high PFHDA contents when cured at room temperature. However, it was possible to achieve optically transparent samples with high PFHDA contents by increasing the cure temperature. The miscibility of these materials has been further studied by differential scanning calorimetry (DSC), dynamic mechanical thermal analysis (DMTA), and atomic force microscopy (AFM). By incorporating PFHDA into the cross-linked system, a low surface energy, very high modulus (up to 458 MPa) thermoset could be achieved which is important for many applications including as hard, abrasion-resistant coating materials.
ISSN:0024-9297
1520-5835
DOI:10.1021/ma101180k