Regensburg 2019 – wissenschaftliches Programm

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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 4: Responsive and Adaptive Systems (joint session CPP/DY)

CPP 4.8: Vortrag

Montag, 1. April 2019, 11:30–11:45, H8

Modelling of light-induced deformations in side-chain azopolymers — •Bharti Yadav, Jan Domurath, and Marina Saphiannikova — Leibniz-Institut für Polymerforschung Dresden e. V., Hohe Str. 6, 01069 Dresden

Photopolymers deform in the presence of light, even below the glass transition temperature, because the stress produced by the light is greater than the yield stress [1]. The deformations in the photopolymers are directional i.e. they depend on the polarization of light [2]. For linearly polarized light the deformation is in the direction of the polarization and for circularly polarized light in the plane perpendicular to the propagation vector. These directional deformations are caused by the light-induced orientation potential, which acts on each chromophore attached to the main chain. From the orientation potential one can calculate the light-induced stress in the sample. We model these photopolymers as visco-plastic materials by implementing the light-induced stress using ANSY, a finite element modelling software. We calculate the strain and elongation as a function of time for both linearly and circularly polarized light.

[1] Toshchevikov, V. et al. J. Phys. Chem. Lett. 8 (2017) p.1094-1098

[2] Kang., H. S. et al. Adv. Funct. Mater. 24 (2014) p.7273-7283