Thermal properties of nanofibers were studied with the help of thermogravimetric analysis (TGA, Perkin−Elmer TGA 4000 system, Billerica, MA, USA) and differential scanning calorimetry (DSC, Perkin−Elmer DSC 8000 system, Billerica, MA, USA). A total of 7 mg and 5 mg of nanofibers were used for each TGA and DSC measurement, respectively. A TGA heating chamber was flushed with nitrogen at 20 mL min−1, preventing the combustion of the samples, and heated at the rate of 10 °C min−1. Similarly, DSC was carried out under a nitrogen environment with a constant flow rate of 21 mL min−1 and heating rate was kept at 5 °C min−1. The operation temperature was between 30 and 700 °C during TGA studies and between 30 and 180 °C during DSC analysis.
Dsc 8000 system
Manufactured by PerkinElmer
Sourced in United States
The DSC 8000 system is a differential scanning calorimetry (DSC) instrument designed to measure the thermal behavior of materials. It provides accurate and precise measurements of phase transitions, glass transitions, and other thermal events in a wide range of samples.
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3 protocols using dsc 8000 system
1
Thermal Analysis of Nanofiber Materials
2
Thermal Analysis of PLGA 502H Polymer Blends
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DSC analysis was performed using the PerkinElmer DSC 8000 System under nitrogen flow (50 ml/min). For DSC analysis, a heating-cooling-heating cycle was applied from −80° to 80°C, with heating and cooling rate set at 10°C/min to determine the glass transition (Tg) temperature of the tested polymer blends. Furthermore, TGA was conducted in a Pyris 1 Thermogravimetric analyzer with heating rate at 20°C/min from 50° to 600°C under nitrogen flow (20 ml/min). Degradation temperatures (Td) of tested polymer samples were determined at the maximum rate of weight loss. All sample analyses were performed in at least triplicate. Thermal analysis was performed on PLGA 502H films submerged in PBS, incubated at 37°C on a shaking incubator (100 rpm), and sampled at different time points.
3
Synthesis and Characterization of Gallium Iodide Glass
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Gallium iodide samples were prepared in a highly
exothermic reaction
by carefully heating stoichiometric amounts of gallium metal (Aldrich,
99.99%) and iodine powder (VWR Rectapur GPR, ≥99%) up to 300
°C, forming a dark red melt. Samples of the gallium iodide glass
were prepared by air quenching a melt of composition Ga2I3.17 (i.e. Ga38.7I61.3), from 400
°C to room temperature. This composition corresponds to the solubility
limit of Ga in the melt at 400 °C. The composition of the glass
was determined as Ga2I3.17 by back-weighing
the residual Ga metal from samples with Ga metal excess. Differential
scanning calorimetry (DSC) data were collected on a PerkinElmer DSC
8000 system at a rate of 10 K min–1. Raman and Fourier
transform infrared (FTIR) spectra were recorded under an inert atmosphere
on a Renishaw Ramascope (HeNe laser, 633 nm) and a Bruker INVENIO-R
spectrometer, respectively. Time-of-flight neutron diffraction data
were recorded on the GEM instrument (RAL-ISIS, UK) in the range Q = 0.1–60 Å–1. The DC conductivity
and AC admittance data were recorded in a two-probe mode using a UNI-T
61C ohmmeter and an Agilent HP 4294A precision impedance analyzer,
respectively. Further experimental details and data evaluation are
provided in theSupporting Information .
exothermic reaction
by carefully heating stoichiometric amounts of gallium metal (Aldrich,
99.99%) and iodine powder (VWR Rectapur GPR, ≥99%) up to 300
°C, forming a dark red melt. Samples of the gallium iodide glass
were prepared by air quenching a melt of composition Ga2I3.17 (i.e. Ga38.7I61.3), from 400
°C to room temperature. This composition corresponds to the solubility
limit of Ga in the melt at 400 °C. The composition of the glass
was determined as Ga2I3.17 by back-weighing
the residual Ga metal from samples with Ga metal excess. Differential
scanning calorimetry (DSC) data were collected on a PerkinElmer DSC
8000 system at a rate of 10 K min–1. Raman and Fourier
transform infrared (FTIR) spectra were recorded under an inert atmosphere
on a Renishaw Ramascope (HeNe laser, 633 nm) and a Bruker INVENIO-R
spectrometer, respectively. Time-of-flight neutron diffraction data
were recorded on the GEM instrument (RAL-ISIS, UK) in the range Q = 0.1–60 Å–1. The DC conductivity
and AC admittance data were recorded in a two-probe mode using a UNI-T
61C ohmmeter and an Agilent HP 4294A precision impedance analyzer,
respectively. Further experimental details and data evaluation are
provided in the
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