Polymer Structure and Dynamics

This area of research is still at its beginning and many aspects are not resolved. This includes in particular the structure and conformation of polymers at an interface as well as the modification of polymer dynamics by the interface. We have given several examples of the potential of surface and interface analytical techniques. They provide information on surface roughness, surface composition, lateral structure, depth profiles, surface-induced order and interfacial mixing of polymers on a molecular and sometimes subnanometer scale. They thus offer a large variety of possible surface and interface studies which will help in the understanding of polymer structure and dynamics as it is modified by the influence... 

Table 5.17 shows the use of NMR in polymer structural and dynamical studies. 13C 1-NMR is successfully applied in detailed characterisation of homo- and... 

Lindman, B., Carlsson, A., Gerdes, S., Karlstroem, G., Piculell, L., Thalberg, K., et al. (1993). Polysaccharide-surfactant systems interactions, phase diagrams and novel gels. In Dickinson, E., Walstra, P. (Eds). Food Colloids and Polymers Structure and Dynamics, Cambridge, UK Royal Society of Chemistry, pp. 113-125. 

Our motivation for offering a further consideration of excimer fluorescence is that it is a significant feature of the luminescence behavior of virtually all aryl vinyl polymers. Although early research was almost entirely devoted to understanding the intrinsic properties of the excimer complex, more recent efforts have been directed at application of the phenomenon to solution of problems in polymer physics and chemistry. Thus, it seems an appropriate time to evaluate existing information about the photophysical processes and structural considerations which may influence excimer formation and stability. This should help clarify both the power and limitations of the excimer as a molecular probe of polymer structure and dynamics. 

This review covers the theory and application of Fourier transform infrared spectroscopy to the characterization of polymers. The basic theory, the sampling techniques and the spectral operations are described. The applications discussed include the study of polymer reactions, polymer structure and dynamic effects. 

D.C. Clark, P.J. Wilde, D. Bergink-Martens, A. Kokelaar and A. Prins in Food Colloids and Polymers Structure and Dynamics , E. Dickinson and P. Walstra (eds.), Royal Society of Chemistry Special Publication No. 113, Cambridge, 1993, p. 354. 

Photochemistry, photophysics Solvent-solute interactions, dynamics of micelles, polymer structure and dynamics, characterization of excited states, excimer and exciplex formation Capability to provide information on rapid phenomena... 

Potentials and Geometry. We will describe results for films containing linear short-chain molecules. These are modeled using a simple bead-spring potential that has been used extensively in studies of polymer structure and dynamics (24). Each spherical monomer within the molecule interacts with all other monomers through a Lennard-Jones (LJ) potential Vy that is truncated beyond rc. For monomers separated by a distance r[Pg.92]

Progress in multidimensional solid-state NMR has been hampered by experimental and conceptual difficulties, but these are now overcome [11-14]. This chapter briefly outlines some of the main concepts and illustrates the information avaUable from multidimensional solid-state NMR spectra concerning polymer structure and dynamics through experimental examples selected from the author s laboratory. 

As these examples indicate, a wealth of information about polymer structure and dynamics is available through advanced multidimensional solid-state NMR techniques. Profound correlations between macroscopic and molecular behavior... 

MD simulations can be performed in many different ensembles, such as grand canonical (pVT), microcanonical (NVE), canonical (NVT) and isother-mal-isobaric (NPT). The constant temperature and pressure can be controlled by adding an appropriate thermostat (e.g., Berendsen, Nose, Nose-Hoover and Nose-Poincare) and barostat (e.g., Andersen, Hoover and Berendsen), respectively. Applying MD into polymer composites allows us to investigate into the effects of fillers on polymer structure and dynamics in the vicinity of polymer-filler interface and also to probe the effects of polymer-filler interactions on the materials properties. 

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