TITLE:

Confinement, Ageing and Rejuvenation Effects in Polymer Films/Composites

DATE:

Friday, March 25th, 2016

TIME:

3:30 PM

LOCATION:

GMCS 214

SPEAKER:

Dr. Alexey V. Lyulin, Theory of Polymers and Soft Matter Group. Technische Universiteit Eindhoven.

ABSTRACT:

In this presentation I will show our recent results on molecular-dynamic (MD) simulations of thin polymer films. I will discuss the

confinement effects for atactic polystyrene, natural rubber and generic bead-rod random copolymer model. I will concentrate mainly on two

questions:

– the influence of the confinement on the glass-transition temperature;

– the influence of the mechanical deformation on the polymer segmental mobility and peculiarities of the glass transition and Payne effect.

The significant drop of the storage modulus under uniaxial deformation (Payne effect) restrains the performance of the elastomer-based composites and

the development of possible new applications. I will present and discuss our LAMMPS and Gromacs MD simulations to study the mechanical properties of

this family of nanocomposite materials. Our goal is to provide simulational insights into the viscoelastic properties of filled elastomers, and try

to connect the macroscopic mechanics with composite microstructure, the strength of the polymer-filler interactions and the polymer mobility at

different scales.

HOST:

Dr. Arlette Baljon

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