The deposited data contain results obtained from measurements: SEM, TEM, OIT, DSC, TGA, GPC, NMR, and tensile tests.
The attached data are provided in the form of text and Excel files as well as source files typical for the respective software used.
The attached data were obtained using the following instruments: Solid-state NMR spectra were recorded on a Bruker AVANCE III WB 400 MHz spectrometer. The spinning rate for all experiments was 6 kHz. 13C cross-polarization magic-angle spinning spectra were obtained under two-pulse-phasemodulating proton decoupling. A recycle delay is 2 s. 1H spin−lattice relaxation time measurements both in the laboratory and in rotating frames T1 and T1ρ, respectively, were measured at room temperature by a saturation recovery method and a spin lock method, respectively. Thermal behavior of samples was probed with a DSC Q20 differential scanning calorimeter (TA Instruments) during heating with the rate of 10 °C/min. Samples of the 7−8 mg mass were cut out from initial and HPT-processed blends and crimped in standard Al. pans. The DSC cell was purged with dry nitrogen during the measurements (50 mL/min). The TGA was performed from room temperature to 600 °C at 10 °C/min with a Rigaku Instrument Thermo plus TG 8120 in a nitrogen atmosphere. The oxidation induction time (OIT) was measured with a DSC 910 differential scanning calorimeter (Du Pont Instrument). OIT was determined as the time (minutes) until the onset of oxidation during heating in an oxygen environment. The average molecular weights (Mn and Mw) were determined using a Gel Permeation Chromatography (GPC) system comprising (Agilent G1379A Degasser coupled to Agilent Pump 1100 Series), two PLGel 5 μMIXED-C columns, and two different laser photometers as detectors, namely, Wyatt Optilab Rex differential refractometer and Dawn Eos (Wyatt Technology Corporation, Santa Barbara, CA, USA). ASTRA 4.90.07 software (Wyatt Technology Corp.) was used for data collection and processing. The elution was carried out using dichloromethane at a flow rate of 0.8 mL min−1 at room temperature. Transmission electron microscopy (TEM) was performed using a Tesla BS 500 electron microscope at 90 kV. Samples were prepared as thin sections approximately 60 nm thick using an ultramicrotome (PowerTome PC, Boeckeler, USA) equipped with a 35° diamond knife (Diatome, Switzerland). No staining or any other chemical treatment was applied to sections prior to observation. Scanning electron microscopy (SEM) was performed by using a JSM-5500 LV scanning electron microscope from JEOL (Tokyo, Japan). Microhardness H was determined with a micro-Vickers hardness tester. An indentation was made on the specimen by a diamond indenter through the application of a load p = 20 g. The size of the resultant indentation was measured with the help of a calibrated optical microscope, and the hardness was evaluated as the mean stress applied underneath the indenter.
(2025-03-24)
