Semiflexible equilibrium polymers: A self-assembling molecular model
Centre for Condensed Matter Theory, Department of Physics
Indian Institute of Science - Bangalore, 560012, India
2 Jawaharlal Nehru Centre for Advanced Scientific Research - Bangalore-560064, India
Accepted: 5 February 2001
We propose a continuum molecular model for self-assembling, semiflexible, equilibrium polymers and study its statistical mechanics by Monte Carlo (MC) simulations. If the temperature (T) is high, we find a disordered phase in which the mean length of polymers is small. A first-order transition separates it from a low-T phase in which is larger and the semiflexible polymers are aligned enough to yield nematic ordering. Disordered, glassy states can be obtained at low T; we study these by an MC analogue of scanning calorimetry (Menon G. I., Pandit R. and Barma M., Europhys. Lett., 24 (1993) 253; Menon G. I. and Pandit R., Phys. Rev. Lett., 75 (1995) 4638; Phys. Rev. E, 59 (1999) 787). We also use an MC method to study shear alignment of polymers (Berret J. F., Roux D. C. and Porte G., J. Phys. II, 4 (1994) 1261; Berret J. F., Roux D. C., Porte G. and Lindner P., Europhys. Lett., 25 (1994)521) in our model).
PACS: 64.70.Md – Transitions in liquid crystals / 83.50.Ax – Steady shear flows, viscometric flow / 47.50.+d – Non-Newtonian fluid flows
© EDP Sciences, 2001