1H NMR spectra were recorded
at room temperature on a Varian VXR 400 MHz (1H: 400 MHz)
spectrometer using deuterated solvents. Chemical shifts (δ)
are reported in ppm, whereas the chemical shifts are calibrated to
the solvent residual peaks. Gel permeation chromatography (GPC) measurements
were performed in THF at 25 °C (1 mL/min) on a Spectra-Physics
AS 1000, equipped with PLGel 5 μm × 30 cm mixed-C columns.
Universal calibration was applied using a Viscotek H502 viscometer
and a Shodex RI-71 refractive index detector. The GPC was calibrated
using narrow disperse polystyrene standards (Polymer Laboratories).
Melt rheology was carried out via a TA Instruments AR 1000 under nitrogen
flow, and 25 mm parallel plate geometries and interplate gap of 0.8–1
mm were used in all cases. Samples were vacuum-dried overnight before
use. All measurements were performed in the linear viscoelastic regime,
determined via torque sweep measurements. Frequency sweeps were carried
out at different temperatures (for PTHY100 they were 40, 45, 55, 65,
75, 85, and 90 °C), and for the reproducibility of the data the
measurement at Tr was
repeated. In all cases, the repeated frequency sweeps were the same
within 5% error.
at room temperature on a Varian VXR 400 MHz (1H: 400 MHz)
spectrometer using deuterated solvents. Chemical shifts (δ)
are reported in ppm, whereas the chemical shifts are calibrated to
the solvent residual peaks. Gel permeation chromatography (GPC) measurements
were performed in THF at 25 °C (1 mL/min) on a Spectra-Physics
AS 1000, equipped with PLGel 5 μm × 30 cm mixed-C columns.
Universal calibration was applied using a Viscotek H502 viscometer
and a Shodex RI-71 refractive index detector. The GPC was calibrated
using narrow disperse polystyrene standards (Polymer Laboratories).
Melt rheology was carried out via a TA Instruments AR 1000 under nitrogen
flow, and 25 mm parallel plate geometries and interplate gap of 0.8–1
mm were used in all cases. Samples were vacuum-dried overnight before
use. All measurements were performed in the linear viscoelastic regime,
determined via torque sweep measurements. Frequency sweeps were carried
out at different temperatures (for PTHY100 they were 40, 45, 55, 65,
75, 85, and 90 °C), and for the reproducibility of the data the
measurement at Tr was
repeated. In all cases, the repeated frequency sweeps were the same
within 5% error.