THE STUDY OF MACROMOLECULAR STRUCTURE BY PULSED NMR

摘要

NMR has been widely used to determine chemical structure. The analysis of many important physical and physico-chemical properties such as molecular weight and mobility, the effect of crosslinking and entanglements and of solvents and temperature, the role of crystalline regions and chain flexibility may be achieved very readily and simply by these techniques. Once the methods of analysis are understood and evaluated, they may serve not only for the analysis of radiation effects but also for other forms of chemical treatment, the role of additives, orientation, and the understanding and evaluation of important physical aspects, for which many of these polymers are intended. The use of pulsed NMR can also be used to evaluate radiation chemistry under different conditions, and it is expected that this knowledge could be extended to biological and medical systems, where a knowledge of the physical arrangements, mobility, entangled and other molecular properties and especially arrangement can be very important, yet difficult to measure.