caa a22 4500 475764803 CHVBK 20180406123602.0 cr unu---uuuuu 170329e20000501xx s 000 0 eng 10.1007/s003960050541 doi (NATIONALLICENCE)springer-10.1007/s003960050541 Giant colloidal crystals of fluorine-containing polymer spheres in exhaustively deionized aqueous suspensions and in the presence of sodium chloride [Elektronische Daten] [T. Okubo, H. Yoshimi, T. Shimizu, R. H. Ottewill]  Gigantic colloidal single crystals (2-6 mm) are formed for fluorine-containing polymer spheres (120-210 nm in diameter) in exhaustively deionized aqueous suspensions. The spheres used are poly(tetrafluoroethylene) (PTFEA and PTFEB), copolymer of tetrafluoroethylene and perfluorovinylether (PFA) and copolymer of tetrafluoroethylene and perfluoropropylene (PTP). The phase diagrams of these spheres are obtained in the deionized suspensions and also in the presence of sodium chloride for PFA. The critical sphere concentrations of crystal melting (φ c) for these spheres are around 0.0006 in volume fraction, which are close to, but slightly larger than, those of monodispersed polystyrene spheres (φ c ≈ 0.00015) and colloidal silica spheres(φ c = 0.0002-0.0004) reported previously. The crystals are largest when the sphere concentrations are a bit higher than the φ c value and their size decreases as the sphere concentration increases. Reflection spectra are taken in sedimentation equilibrium as a function of the height from the bottom of the suspension. The static elastic modulus is estimated to be 10.8 and 28.7 Pa for PTFEA and PTP spheres at the sphere concentrations 0.00325 and 0.00322 in volume fraction, respectively. Springer-Verlag Berlin Heidelberg, 2000 Key words Colloidal crystal nationallicence Fluorine-containing polymer nationallicence Giant crystals nationallicence Morphology nationallicence Reflection spectra nationallicence Okubo T. Department of Applied Chemistry Faculty of Engineering, Gifu University Yanagido 1-1, Gifu 501-1193, Japan e-mail: okubotsu@apchem.gifu-u.ac.jp Fax: +81-58-2932628, JP aut Yoshimi H. Department of Applied Chemistry Faculty of Engineering, Gifu University Yanagido 1-1, Gifu 501-1193, Japan e-mail: okubotsu@apchem.gifu-u.ac.jp Fax: +81-58-2932628, JP aut Shimizu T. Daikin Industries Co., Settsu Osaka 566-8585, Japan, JP aut Ottewill R. H. School of Chemistry University of Bristol Cantock's Close Bristol BS8 1TS, UK, GB aut https://doi.org/10.1007/s003960050541 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s003960050541 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Okubo T. Department of Applied Chemistry Faculty of Engineering, Gifu University Yanagido 1-1, Gifu 501-1193, Japan e-mail: okubotsu@apchem.gifu-u.ac.jp Fax: +81-58-2932628, JP aut NATIONALLICENCE 700 1- Yoshimi H. Department of Applied Chemistry Faculty of Engineering, Gifu University Yanagido 1-1, Gifu 501-1193, Japan e-mail: okubotsu@apchem.gifu-u.ac.jp Fax: +81-58-2932628, JP aut NATIONALLICENCE 700 1- Shimizu T. Daikin Industries Co., Settsu Osaka 566-8585, Japan, JP aut NATIONALLICENCE 700 1- Ottewill R. H. School of Chemistry University of Bristol Cantock's Close Bristol BS8 1TS, UK, GB aut Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer