Dresden 2017 – wissenschaftliches Programm

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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 29: Polymer Networks and Dynamics III: Mechanical Properties

CPP 29.1: Vortrag

Dienstag, 21. März 2017, 14:00–14:15, ZEU 250

Tuning the Properties of Polymer Films by Manipulating the Preparation Pathways — •Sivasurender Chandran, Rishab Handa, and Günter Reiter — Experimental Polymer Physics Group, Physikalisches Institut, Universität Freiburg, Freiburg, Germany

Polymer thin films take a central stage in various technological fronts ranging from polymer electronics to responsive biological surfaces. As a consequence, the ability to tune the properties of polymer films is of crucial importance. Here, through controlled manipulation of preparation pathways, we show that the final properties of pristine polymer films viz., the amount of residual stresses, elastic modulus and work for deformation, quantifying the film stability, can be tuned by orders of magnitude. Further, by identifying a normalized preparation parameter characterizing the non-equilibrium nature of polymer thin films, we deduced simple scaling relations between relaxation time and film stability with the amount of preparation induced residual stresses. Our experiments provide simple strategies for manipulating the lifetime of non-equilibrium states and hence for tuning the properties of polymer films.