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Viscoelastic Characterization of a Thermoplastic Elastomer Processed through Material Extrusion
Bàrbara Adrover-Monserrat1, Silvia García-Vilana1, David Sánchez-Molina1
1Universitat Politècnica de Catalunya, Escola d'Enginyeria de Barcelona Est, Av. d'Edurad Maristany, 10-16, 08019 Barcelona, Spain.
Polymers
|July 27, 2022
Summary
This study characterizes the viscoelastic behavior of Polyether-Block-Amide (PEBA 90A) using a Quasi-Linear Visco-Elastic (QLVE) model. The model accurately predicts material behavior under various testing conditions, providing valuable reference data.
Area of Science:
- Materials Science
- Polymer Physics
- Mechanical Engineering
Background:
- Polyether-Block-Amide (PEBA 90A) is a thermoplastic elastomer with complex viscoelastic properties.
- Understanding its mechanical behavior is crucial for accurate simulations and material selection.
- Manufacturing conditions can influence the viscoelastic response of polymers.
Purpose of the Study:
- To characterize the viscoelastic behavior of PEBA 90A.
- To determine reference values for a constitutive model (QLVE) for PEBA 90A.
- To assess the influence of manufacturing conditions on PEBA 90A's mechanical response.
Main Methods:
- Uniaxial relaxation tests were performed on PEBA 90A filaments.
- A Prony series was used to fit parameters for a Quasi-Linear Visco-Elastic (QLVE) model.
- Fast cyclic loading tests were conducted to validate the QLVE model.
Main Results:
- The QLVE model accurately predicted the results of uniaxial relaxation tests.
- The model's predictions showed excellent agreement with fast cyclic loading test data.
- A six-parameter QLVE model effectively describes the small strain viscoelastic behavior of PEBA.
Conclusions:
- The QLVE model is highly effective for simulating PEBA 90A's viscoelasticity.
- The determined model parameters provide reliable reference values for engineering applications.
- The study confirms the suitability of the QLVE model for PEBA under various mechanical tests.
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