The confined-to-bulk dynamics transition of polymer melts in nanoscopic pores of solid matrices with varying pore diameter

Details The confined-to-bulk dynamics transition of polymer melts in nanoscopic pores of solid matrices with varying pore diameter The confined-to-bulk dynamics transition of polymer melts in nanoscopic pores of solid matrices with varying pore diameter

Apr 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004njph....6...46f&link_type=abstract

New Journal of Physics, Volume 6, Issue 1, pp. 46 (2004).

Physics

13

Scientific paper

The confinement of polymer melts in nanoscopic pores leads to chain dynamics significantly different from bulk behaviour. This so-called 'corset effect' occurs both above and below the critical molecular mass and induces dynamic features as predicted for reptation. The confined-to-bulk dynamics crossover is treated analytically on the basis of general thermodynamic relations connected to the fluctuation of the number of particles (Kuhn segments) in a given volume. Bulk behaviour is shown to occur only if the pore diameter complies with the limit dporeGt(b3/kBTkgrT)1/3RFap10RF, where b is the Kuhn segment length, kgrT the isothermal compressibility, T the temperature, kB the Boltzmann constant and RF the Flory radius. For smaller pores, the confined polymer chains reptate along their own contours in tubes with an effective diameter d \approx \sqrt {b^{{2}} \rho_{s} k_{B} T\kappa_{T}}\approx 0.5\,{\rm nm}, where rgrs is the number density of Kuhn segments. From the theoretical point of view, the crucial factors on which the corset effect is based are (i) impenetrable pore walls, (ii) low compressibility and (iii) the uncrossability of polymer chains.

Affiliated with

Also associated with

No associations

Rating

The confined-to-bulk dynamics transition of polymer melts in nanoscopic pores of solid matrices with varying pore diameter 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 The confined-to-bulk dynamics transition of polymer melts in nanoscopic pores of solid matrices with varying pore diameter, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The confined-to-bulk dynamics transition of polymer melts in nanoscopic pores of solid matrices with varying pore diameter will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-739429