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11	Dynamic Mechanical Thermal Analysis of Polyoxymethylene Asare, Richard January 2024 (has links) This thesis, conducted in collaboration with IKEA Components, explores the rate-temperature dependence of polyoxymethylene (POM) thermoplastic using dynamic mechanical thermal analysis (DMTA). A force-controlled DMTA study was carried out, and the experimental data were processed to derive the complex, storage, and loss modulus. Master curves were constructed using the time-temperature superposition (TTS) method, comparing the Arrhenius and William-Landel-Ferry (WLF) equations. Additionally, a master curve was manually created by shifting isothermal material properties. This manual curve was then compared to those generated using standard equations. The study found that the storage modulus was the dominant phenomenon in POM, with the loss modulus showing distortion likely due to measurement noise. Results indicated a slight softening of the storage modulus with increased cyclic loading. The manually constructed master curve was more coherent compared to those derived from the Arrhenius and WLF equations. Viscoelasticity dynamic mechanical thermal analysis dynamic mechanical analysis storge modulus loss modulus frequency time-temperature equivalence WLF equation Arrhenius equation time-temperature superposition shift factor master curve Textile, Rubber and Polymeric Materials Textil-, gummi- och polymermaterial