Modeling Based Characterization of Thermorheological Properties of Polyurethane ESTANE
E. Ghobadi, R. Sivanesapillai, J. Musialak, H. Steeb,
Volume: 2016 (2016). Pages: 11
DOI: 10.1155/2016/7514974
Published: 2016
Abstract
Shape-Memory Polymers (SMPs) have the ability to be deformed and
memorize this deformation until an external activation stimulus (e.g.,
heat) is applied. Therefore, they have attracted great interest in
many areas, especially for applications where reconfigurable structures
are required (e.g., Shape-Memory (SM) stents or micro air vehicles).
Nevertheless, prior to technical application, the effective thermomechanical
behavior of SMPs must be thoroughly understood. In the current contribution,
an assessment of thermorheological properties of the commercially
available polyurethane system ESTANE is presented. Thermorheological
properties were investigated using Dynamic Mechanical Thermal Analysis
(DMTA) and complementary uniaxial stress relaxation experiments.
Upon material parameter optimization, a finite viscoelastic and incompressible
material model was used to model experimentally observed viscoelastic
properties.