Viscoelastic Characterization of a Thermoplastic Elastomer Processed through Material Extrusion

Bàrbara Adrover-Monserrat; Silvia García-Vilana; David Sánchez-Molina; Jordi Llumà; Ramón Jerez-Mesa; J Antonio Travieso-Rodriguez

doi:10.3390/polym14142914

Viscoelastic Characterization of a Thermoplastic Elastomer Processed through Material Extrusion

Polymers (Basel). 2022 Jul 18;14(14):2914. doi: 10.3390/polym14142914.

Authors

Bàrbara Adrover-Monserrat¹, Silvia García-Vilana¹, David Sánchez-Molina¹, Jordi Llumà¹, Ramón Jerez-Mesa¹, J Antonio Travieso-Rodriguez¹

Affiliation

¹ Universitat Politècnica de Catalunya, Escola d'Enginyeria de Barcelona Est, Av. d'Edurad Maristany, 10-16, 08019 Barcelona, Spain.

Abstract

Objective. We aim to characterize the viscoelastic behavior of Polyether-Block-Amide (PEBA 90A), provide reference values for the parameters of a constitutive model for the simulation of mechanical behaviors, and paying attention to the influence of the manufacturing conditions. Methods. Uniaxial relaxation tests of filaments of PEBA were used to determine the values of the parameters of a Prony series for a Quasi-Linear Visco-Elastic (QLVE) model. Additional, fast cyclic loading tests were used to corroborate the adequacy of the model under different test criteria in a second test situation. Results. The QLVE model predicts the results of the relaxation tests very accurately. In addition, the behavior inferred from this model fits very well with the measurements of fast cyclic loading tests. The viscoelastic behavior of PEBA under small strain polymer fits very well to a six-parameter QLVE model.

Keywords: PEBA; constitutive models; mechanical properties; prony series; viscoelasticity.

Grants and funding

This research did not receive any specific grants from funding agencies in the public, commercial, or not-for-profit sectors’. S.G.-V. acknowledges the Ministerio de Universidades of Spain for her Margarita Salas Grant.