## 2 Materials and Methods
### Measurements  
Molecular weight was estimated using size exclusion chromatography (GPC) with a Shimadzu liquid chromatograph (model LC-8A, Tokyo, Japan) and analyzed using the Empower software 3.8.1 (Waters, Milfold, MA, USA). The polymer was dissolved and diluted in 1,1,1,3,3,3-hexafluoroisopropanol (HFIP) containing 0.05 M CH\({}_{3}\)COONa. The flow rate was set to 1 mL/min, with an injection volume of 20 \(\upmu\)L and a sample concentration of 2 mg/mL. A PL HFIP gel column (Polymer Lab, Agilent Technologies Deutschland GmbH, Boblingen, Germany) and a Shimadzu RID-10A refractive index detector were used. The average molecular weights and numbers were determined using polymethyl methacrylate standards. Infrared absorption spectra were recorded at a resolution of 4 cm\({}^{-1}\) using a Jasco Fourier transform FTIR 4100 spectrometer (Jasco, Tokyo, Japan). The measurements employed a Specac MKII Golden Gate Single Reflection Diamond ATR system (Specac, Orpington, Kent, UK), which is operational up to 200 \({}^{\circ}\)C, along with a high stability 4000 series controller. A Focused Ion Beam Zeiss Neon40 microscope (Zeiss, Oberkochen, Germany) operating at 5 kV was used to obtain SEM micrographs of micromolded specimens. Samples were mounted on double-sided adhesive carbon discs and sputter-coated with a thin layer of carbon using a Mitec K950 Putter Coater (Quorum Technologies Ltd., Ashford, UK). Tensile deformation tests were conducted using a Zwick Roell Z050 Universal Tester (Barcelona, Spain), equipped with a 500 N load cell and testXpert 8.1 software (Zwick, Ulm, Germany), following UNE EN ISO 527 standards (Zwick, Ulm, specimens were tested for each processing condition. Figure 1: (a) Sonorus 2G\({}^{\circledgtr}\) prototype, including the clamping unit and detailed USM components; (b) The operational sequence of the Sonorus 2G\({}^{\circledgtr}\). Calorimetric data were recorded using differential scanning calorimetry (DSC) with a TA Instruments Q20 series device (New Castle, DE, USA), equipped with a cooling system operating from \(-40\) to \(400\)\({}^{\circ}\)C. The experiments were conducted under a flow of dry nitrogen with samples of approximately 3 mg. The instrument was calibrated for temperature and heat of fusion using an indium standard. Tzero technology required two calibrations: one with empty pans and another with sapphire discs. The thermal characterization of the polymers followed a three-step protocol: an initial heating run of the as-molded sample, a cooling run after holding the sample in the melt for 1 min, and a second heating run of the non-isothermally crystallized sample. All scans were performed at a rate of 10 \({}^{\circ}\)C/min. Thermogravimetric analysis (TGA) and differential thermogravimetric analysis (DTGA) data were acquired using a TA Instruments Q50 thermogravimetric analyzer (New Castle, DE, USA). Studies were conducted under a flow of dry nitrogen with approximately 5 mg samples and a heating rate of 20 \({}^{\circ}\)C/min. The structure of the processed specimens, specifically the spacing between layers of nanoclays within the polymer, was analyzed using Wide-Angle X-ray Diffraction (WAXD). A Bruker D8 Advance model (Bruker AXS GmbH, Karlsruhe, Germany) with Cu K\(\alpha\) radiation (\(\lambda\) = 0.1548 nm) and Bragg-Brentano geometry (theta-2 theta) was utilized. A one-dimensional Lynx Eye detector (Bruker AXS GmbH, Karlsruhe, Germany) was employed. The samples were processed at 40 kV and 40 mA, with a 2-theta range of 2\({}^{\circ}\) to 40\({}^{\circ}\). Measurements were taken in steps of 0.02\({}^{\circ}\), and a time per step ranging from 2 to 8 s.  
The distribution of Cloisite 20 and Cloisite 116 within the polymer matrix was further examined using a Philips TECNAI 10 electron microscope (Philips Electron Optics, Eindhoven, The Netherlands) at an acceleration voltage of 100 kV. Thin sections of the samples were prepared using a Sorvall Porter-Blum microtome (Sorvall, New York, NY, USA) equipped with a diamond knife.