Internal dissipation of a polymer

Details Internal dissipation of a polymer Internal dissipation of a polymer

2010-03-04

arxiv.org/abs/1003.0944v2

Physics

Condensed Matter

Soft Condensed Matter

6 pages, 8 figures

Scientific paper

The dynamics of flexible polymer molecules are often assumed to be governed by hydrodynamics of the solvent. However there is considerable evidence that internal dissipation of a polymer contributes as well. Here we investigate the dynamics of a single chain in the absence of solvent to characterize the nature of this internal friction. We model the chains as freely hinged but with localized bond angles and 3-fold symmetric dihedral angles. We show that the damping is close but not identical to Kelvin damping, which depends on the first temporal and second spatial derivative of monomer position. With no internal potential between monomers, the magnitude of the damping is small for long wavelengths and weakly damped oscillatory time dependent behavior is seen for a large range of spatial modes. When the size of the internal potential is increased, such oscillations persist, but the damping becomes larger. However underdamped motion is present even with quite strong dihedral barriers for long enough wavelengths.

Affiliated with

Also associated with

No associations

Rating

Internal dissipation of a polymer does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Internal dissipation of a polymer, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Internal dissipation of a polymer will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-559084