Dynamics of bulk polymers

Fedotov, V. D. and Schneider, H. Structure and Dynamics of Bulk Polymers by NMR-Methods, Springer- Verlag Heidelberg 1989. 

The dynamics of bulk polymers have been approached in two different ways. On one hand, models of localized conformational jumps have been proposed to interpret numerous NMR experiments (see e.g. Ref. or . These models, which are specific of a given polymer assume that a short chain sequence performs conforpia-tional jumps between a few number of sites, the rest of the chain being immobile. Such localized jumps would lead to a well separated elastic peak in neutron quasielastic scattering experiments, in contradiction with all the experimental data obtained from polymer meltsIndeed, these models can in some cases be invoked to describe secondary relaxations in glassy polymers, but they are not sufficient to account for the numerous liquid-like properties of polymer melts. 

In this chapter, we consider the sensitivity of the different NMR parameters to both molecular motions and spin dynamics. The first two parts illustrate the capability of NMR to study the local dynamics of bulk polymers at temperatures above and below the glass-transition temperature, Tg, respectively. The third part is devoted to the NMR investigation of the solid-state organization of heterogeneous polymer systems. In this last section, examples are taken mainly from the field of polymer blends. 

V. D. Fedotov and H. Schneider, Structure and dynamics of bulk polymers by NMR method, NMR, Basic Principles and Progress Vol. 21, Springer, Berlin, 1989. 

This Chapter is restricted to synthetic polymers and is divided as in Volume 1 into three main sections on conformational and structural analysis, the dynamics of polymers in solution, and the phase structure and dynamics of bulk polymers. However, the limited space available forbids mentioning the 400 or so papers that could have been included. Since the majority of these papers involve the relatively routine use of n.m.r. as an analytical tool, the section on structural analysis has been considerably abbreviated and now includes only a few papers of general theoretical or experimental interest. It is felt that in this Series it is more useful to maintain a reasonably comprehensive coverage of the remaining sections, rather than a sketchy coverage of the whole. 

Best A, Pakula T, Fytas G (2005) Segmental dynamics of bulk polymers studied by fluorescence correlation spectroscopy. Macromolecules 38(10) 4539-4541... 

DYNAMICS OF BULK POLYMERS AND POLYMERIZING SYSTEMS AS STUDIED USING DIELECTRIC RELAXATION SPECTROSCOPY... 

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