Solid State NMR of Polymers by Cecil Dybowski (auth.), Lon J. Mathias (eds.) PDF
By Cecil Dybowski (auth.), Lon J. Mathias (eds.)
The chapters during this assortment are from papers that have been awarded at a symposium on solid-state NMR of polymers. A two-part application on on hand NMR strategies acceptable to sturdy polymer research was once provided on the third Chemical Congress of North American held in Toronto, Ontario, June 5-10,1988. this system used to be backed through the department of Polymer Chemistry with aid supplied via the department, its business Sponsors, and the Donors of the Petroleum examine Fund administered by way of the yankee Chemical Society. Co-organizers integrated Professor Colin Fyfe of the collage of British Columbia (Vancouver, Canada), Professor Hans Spiess of the Max Planck Institut fur Polymerforschung (Mainz, West Germany), and myself. The full-day instructional, which used to be loose to registered attendees, coated the diversity of issues. the aim of the educational was once to supply a easy advent to the sphere in order that rookies to its current and destiny functions might advance adequate knowing to profit successfully from the following symposium. the 1st speak tried to provide listeners a consider for how a amateur spectroscopist can discover ways to use a few of the NMR innovations to discover his personal parts of curiosity. basic experiments supplies designated information regarding strong polymers that may be important in studying artificial effects and in touching on solid-state conformation, morphology and molecular movement to actual properties.
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Extra info for Solid State NMR of Polymers
17. 2H-Labelled Perfluorodecyldecane Fluorocarbon polymers have unique thermal, chemical and mechanical properties but are difficult to process. As a result, studies are being done on oligomers and polymers which contain both fluorocarbon and hydrocarbon segments. Chemically-linked copolymers should have properties between poly(tetrafluoroethylene) and polyethylene. Recent research has focused on semifluorinated alkanes of the general structure 1 as models for potential polymers. [39,40] Semifluorinated n-alkanes exhibit unusual solid and liquid crystalline states consisting of lamellar bilayers.
The spectra of the semifluorinated material 90 degree orientafion 45 degree orientatiol) --112kHz-- odegree orientation 150 75 o -75 -150 kH~ Figure 31. Solid-state 2H NMR spectra of bulk perfluorodecyl decane-dp in the LeI phase with outer pattern more intense (cooled from isotropic state). Ronald F. Colletti and Lon J. Mathias 54 90 degree orientation 45 degree orientation odegree orientation 150 75 o kHz -75 -150 Figure 32. Solid-state deuterium NMR spectra of bulk perfluorodecyl decane-dp in the LCI phase when the inner pattern was more intense (after cooling from the isotropic state).
J-- - -:EaEdfdEa:flPdfd-Pd_-:_ Figure 35. Schematic representation of the LCI phase oriented between glass plates.
Solid State NMR of Polymers by Cecil Dybowski (auth.), Lon J. Mathias (eds.)