Abstracts Book - IMRC 2018

• SB1-P098
LINEAR VISCOELASTICITY ON ATTRACTIVE SYSTEMS: ARRESTED
SPINODAL DECOMPOSITION.
Leticia Lopez Flores 1 , José Manuel Olais Govea 1,2 , Martín Chavéz Páez 1 , Magdaleno Medina
Noyola 1
1
Universidad Autónoma de San Luis Potosí, Instituto de Fisica, Mexico. 2 Tecnológico de
Monterrey, Escuela de Ingeniería y Ciencias, Mexico.
The recent non-equilibrium self-consistent generalized Langevin equation (NE-
SCGLE) theory of irreversible process in liquids [1,2] has permitted to obtain a
description of non- equilibrium processes involved in the arrested spinodal
decomposition due to sudden and deep quenches inside the spinodal region.
For a simple model liquid, where the system could be modeling by a hard sphere
plus an attractive Yukawa tail, this theoretical approach predicts that the
spinodal line is the borderline between the ergodic and the arrested states. Also,
by means of this approach has been determined a border between phase
separation and gelation, besides providing the corresponding dynamic
properties to each phase [3]. This work addresses a general method to obtain
the linear viscoelastic properties of non- equilibrium processes involved in the
spinodal decomposition when the system has been quenching inside the
spinodal region. Also, we show an example of the normalized shear viscosity as
a function of the waiting time. This scheme offers the opportunity to describe
the linear viscoelasticity and the diffusion mechanics as the waiting time elapses.
Furthermore this approach is able to describe gelation effects, it leads naturally
to a diverging shear viscosity at glass and gelation transition points.
References:
[1] P. E. Ramárez-González and M. Medina-Noyola, Phys. Rev. E 82, 061503
(2010).
[2] P. E. Ramárez-Gonzá¡lez and M. Medina-Noyola, Phys. Rev. E 82, 061504
(2010).
[3] J. M. Olais-Govea, L. López-Flores and M. Medina Noyola, The Journal of
Chem. Phys. 143, 174505 (2015).
Acknowledgment:
Consejo Nacional de Ciencia y Tecnología (CONACYT, México), through grants:
182132, 242364, FC-2015-2-1155 and Laboratorio Nacional de Ingeniera de la
Materia Fuera de Equilibrio.