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Future Perspectives: Moving to Longer Length and Time Scales, from Polymers to Biological Macromolecules

  • Dieter RichterEmail author
Chapter
Part of the Neutron Scattering Applications and Techniques book series (NEUSCATT)

Abstract

The chapter starts by revising the basic ingredients of large-scale dynamics in polymers. The Rouse model and the reptation model are discussed, alluding to some of the limitations of the former, with regard to chain interactions that are neglected. Then the molecular foundations of rheology are addressed, in particular the contour length fluctuation (CLF) mechanism including chain retraction, which is the basis for the hierarchical relaxation in branched polymers. From simple polymers, the chapter moves to discuss the dynamics in systems of increasing complexity using three examples. The first relates to the dynamics of a soft interface in a polymeric mesophase, specifically to undulation dynamics of a lamellar phase. Then, the issue of confinement is discussed on the example of the random confinement that is created in a polymer blend with components of very different glass transition temperatures. In this case, the high Tg component creates a random frozen matrix that confines the fast component. Finally, protein diffusion in polymeric gels is considered. In some way, this mimics the motion of proteins in crowded environments. The last part of the chapter discusses some novel developments regarding the large-scale dynamics in proteins, such as domain motion. These dynamics are shown to be crucial for biological function. The chapter ends with an extended outlook of the possible directions of neutron research in the field of macromolecular dynamics.

Keywords

Dynamic Structure Factor Generalize Langevin Equation Rouse Model Rouse Time Rouse Relaxation 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer Science+Business Media, LLC 2012

Authors and Affiliations

  1. 1.Institut für FestkörperforschungJülichGermany

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