arXiv subjects

O. Pekcan

Publications and source records attributed to O. Pekcan.

2 recordsLinked to original sources

arXiv2002

Percolation exponents at the entanglement transition

NOTE: This paper has been withdrawn by the authors, because they have been subsequently convinced that the sudden increase in the pyrene fluorescence cannot arise from entanglements but must rather come from a caging effect, at much smaller length scales, signalling the onset of vitrification. Thus the percolation exponents that are observed must arise from the percolation of these dense caging regions.

cond-mat.stat-mech↗

arXiv2002

Slow regions percolate near glass transition

A nano-second scale in situ probe reveals that a bulk linear polymer undergoes a sharp phase transition as a function of the degree of conversion, as it nears the glass transition. The scaling behaviour is in the same universality class as percolation. The exponents γand βare found to be 1.7 \pm .1 and 0.41\pm 0.01 in agreement with the best percolation results in three dimensions.

cond-mat.soft↗