Salim O. Structure characterization of fluoropolymers using NMR in the solid state, in the melt and in supercritical carbon dioxide (sc CO2): Diss. zur Erlangung des academischen Grades Dr. rer. nat / Technische Universitat Dresden. - Dresden, 2008. - 98 p.: ill. - Ref.: p.94-98.  Место хранения:   038 | Институт химии и химической технологии CO РАН | Красноярск

Contents

1 Introduction ................................................. 6 2 State of the Art and Theoretical Background .................. 8 2.1 Fluoropolymers .......................................... 8 2.1.1 Polytetrafluoroethylene (PTFE) ................... 8 2.1.2 PTFE Micropowders ............................... 10 2.1.3 Terpolymer of Tetrafluoroethylene(TFE), Hexafluoropropylene (HFP), Vinylidenefluoride (VDF), (THV) .................................... 11 2.2 Solid-State and High-Pressure NMR ...................... 12 2.2.1 Solid-State NMR ................................. 17 2.2.2 High-Pressure (HP) NMR .......................... 18 2.2.3 19F-NMR ......................................... 20 2.3 Supercritical Fluids (SCFs) ............................ 27 2.3.1 Supercritical Carbondioxide (sc CО2 ............. 30 2.3.2 Interactions of solutes with sc CО2 ............. 32 2.3.3 Advantages and applications of sc CО2 ........... 34 3 Experimental ................................................ 36 3.1 Materials and Apparatus ................................ 36 3.2 Solid-State Magic Angle Spinning (MAS), High- Temperature 19F-NMR, and High-Pressure 19F-NMR in sc CO2 .................................................... 36 3.3 High-Pressure NMR Procedure ............................ 39 4 Results and Discussion ...................................... 43 4.1 One Dimensional (1D) Solid-State and Melty 19F-NMR ..... 43 4.2 Two Dimensional (2D) Solid-State 19F-NMR ............... 47 4.3 MELTY 19F-NOESY and 19F-TOCSY ........................... 51 4.4 19F-NMR in sc C02 ....................................... 72 5 Conclusion .................................................. 88 6 Appendices .................................................. 90 Appendix A: Abbreviations, Symbols, and Units .................. 90 Appendix В: Figures and Tables ................................. 92 Appendix С: References ......................................... 94