Download or read book Application of Solid state Nuclear Magnetic Resonance to Investigate Fluorine Segregation in Polymers and Diamond Surfaces written by Bruce Elliott Scruggs and published by . This book was released on 1993 with total page 494 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book American Doctoral Dissertations written by and published by . This book was released on 1994 with total page 800 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Nuclear Magnetic Resonance Studies of Solvent and Polymer Dynamics in Polystyrene Solutions written by Michael Eugene Moseley and published by . This book was released on 1980 with total page 356 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Solid state Nuclear Magnetic Resonance of Polyphosphazenes and Nonlinear Optical Polymers written by Sharon Ann Taylor Myers and published by . This book was released on 1993 with total page 171 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Proton and Fluorine Nuclear Magnetic Resonance Spectral Data written by Katsuhiko Kushida and published by . This book was released on 1988 with total page 296 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book 13C Solid state Nuclear Magnetic Resonance Study of the Miscibility of Polymer Blends written by Jian Wang and published by . This book was released on 1999 with total page 182 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Solid State Nuclear Magnetic Resonance Studies of Polypeptides Adsorbed on Silica and Hydroxyapatite Surfaces written by Veronica Lim Fernandez and published by . This book was released on 1992 with total page 436 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Solid state Nuclear Magnetic Resonance Spectroscopy of Phosphazene Polymers written by Alexey S. Borisov and published by . This book was released on 2009 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: High-resolution one-dimensional 1H, 19F, 31P and 13C MAS NMR experiments were used in a morphological study of solvent-cast and heat-treated poly[bis(trifluoroethoxy)phosphazene] (PBFP). Deconvolution analyses performed on all Nuclear Magnetic Resonance (NMR) spectra are presented. These results suggest the presence of broad and narrow overlapping components at ambient temperature, which were assigned to the crystalline, amorphous and the mesophase regions within the polymer, respectively. The number of signals in the spectra was independently verified using 1H, 19F and 13C Discrimination Induced by Variable Amplitude Minipulses (DIVAM) nutation experiments. Deconvolution analyses showed that heat-treatment increases the overall crystallinity of the solvent-cast PBFP. Further studies conducted on two preparations of the polymer showed significant differences in crystallinity due to variations in the reaction conditions. Magic-Angle Spinning (MAS) NMR spectra of PBFP obtained via living cationic polymerization at ambient temperature indicated that the polymer contains mostly amorphous and mesophase regions with only a small contribution from the crystalline domain. Variable-temperature 31P NMR experiments suggested that the thermotropic transition occurs in a temperature range of 80oC to 90oC, where the crystalline signal disappears and a new signal due to a liquid crystalline phase emerges. Spin-lock 31P experiments provided rates of the transverse relaxation in the rotating frame for each signal, showing that the crystalline and the amorphous regions within the polymer are characterized by significantly different mobilities at ambient temperatures, while the v comparable degree of motion occurs between the amorphous and mesophase environments at temperatures above 90oC. The process of thermal ring-opening polymerization of hexachlorocyclotriphosphazene was monitored using one-dimensional 31P MAS NMR at different stages of the reaction. The ratio between cyclic species and the high molecular weight poly(dichlorophosphazene) was seen to change over time. 31P NMR was seen to be a potentially valuable tool in monitoring rates of chain propagation, branching and cross-linking. Two-dimensional 31P homonuclear Radio-Frequency Driven Recoupling (RFDR) and Incredible Natural Abundance Double Quantum Transfer (INADEQUATE) MAS NMR experiments were first tested on the partially phenoxy-substituted hexachlorocyclotriphosphazene, and subsequently applied in the study of a preparation of the partially trifluoroethoxy-substituted poly(dichlorophosphazene). Very high resolution was obtained in the direct dimension due to the presence of low molecular weight species. Preliminary spectral assignments of all of the observed signals were made on the basis of both known chemical shifts of the related species, and the through-space and through-bond phosphorous-phosphorous connectivities.

Download or read book Application of Solid state NMR to the Study of Polymers written by E. Perez Taberno and published by . This book was released on 1988 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Solid state Nuclear Magnetic Resonance Studies of a Polymer Blend written by Andrew William Hodgson and published by . This book was released on 2002 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Energy Research Abstracts written by and published by . This book was released on 1986 with total page 936 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Applications of Proton and Fluorine Nuclear Magnetic Resonance Spectroscopy to the Study of Large Organic Molecules written by Christopher William Maitland Grant and published by . This book was released on 1972 with total page 334 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Applications of proton and fluoride nuclear magnetic resonance spectroscopy of the study of large organic nucleocules written by Christopher William Maitland Grant and published by . This book was released on 1972 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Nuclear Magnetic Resonance Study of the Trifluorovinyl Group written by Charles Glen Moreland and published by . This book was released on 1964 with total page 116 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book A High Resolution Solid State Nuclear Magnetic Resonance Investigation of Aluminosilicate and Oxynitride Glasses written by Robert K. Sato and published by . This book was released on 1990 with total page 370 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Applications of Proton and Fluorine Nuclear Magnetic Resonance Spectroscopy to the Study of Large Organic Molecules microform written by Christopher William Maitland Grant and published by National Library of Canada. This book was released on 1972 with total page 334 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Solution and Solid State NMR Studies of Fluorine Tagging Reagents written by Michael Philip Spratt and published by . This book was released on 1985 with total page 398 pages. Available in PDF, EPUB and Kindle. Book excerpt: