Data Sets for a Fractional Moisture-Dependent Viscoelasticity Model for Thermoplastic Polymers

<p>This dataset contains Dynamical Mechanical Thermal Analysis (DMTA) results, including the determination of the complex Young’s modulus and complex shear modulus from torsion and tension measurements. The dataset is associated with the publication <em>Fauser et al. (2025)</em> and complements the dataset <a href="https://doi.org/10.18419/DARUS-5370">“A Modular Framework for Non-Linear Optimization of Linear Viscoelastic Model Parameters Using a Second-Order Fractional Approach”</a>.</p>

<p>Frequency-dependent measurements were performed using a rheometer (MCR 702, linear motor, Anton Paar, Graz, Austria) over a frequency range of 0.1 s⁻¹ to 10 s⁻¹. The applied strain amplitudes were ε = 0.01 % (axial) and γ = 0.01 % (shear). Measurements were conducted at constant temperatures within the glass transition range of the respective polymers.</p>

<p>Master curves were generated from frequency sweeps of the complex Young’s and shear moduli for cylindrical samples (BASF, Ludwigshafen, Germany) of:</p> <ul>
<li>Poly-l-actic acid (PLA)</li>
<li>Poly-ethylene terephthalate (PET)</li>
<li>Poly-amid (PA)</li>
</ul>
<p>and for rectangular samples of:</p>
<ul> <li>Thermoplastic poly-urethane (TPU, SMP Technologies Inc., Tokyo, Japan)</li> </ul>
<p>TPU samples were analyzed at varying moisture contents (in 10 % RH increments). The corresponding state-dependent shift factors used for master curve generation are also provided in the dataset.</p>