Polymers in crowded environment under stretching force: globule-coil transitions

Details Polymers in crowded environment under stretching force: globule-coil transitions Polymers in crowded environment under stretching force: globule-coil transitions

2009-07-14

arxiv.org/abs/0907.2418v2

Phys. Rev. E 80, 051805 (2009)

Physics

Condensed Matter

Soft Condensed Matter

8 pages

Scientific paper

10.1103/PhysRevE.80.051805

We study flexible polymer macromolecules in a crowded (porous) environment, modelling them as self-attracting self-avoiding walks (SASAW) on site-diluted percolative lattices in space dimensions d=2, 3. The influence of stretching force on the polymer folding and properties of globule-coil transitions are analyzed. Applying the pruned-enriched Rosenbluth chain-growth method (PERM), we estimate the transition temperature T_{\Theta} between collapsed and extended polymer configurations and construct the phase diagrams of the globule-coil coexistence when varying temperature and stretching force. The transition to a completely stretched state, caused by applying force, is discussed as well.

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