Thermal properties were measured using a DSC instrument (DISCOVERY 25, TA Instruments, New Castle, DE) and thermogravimetric analysis (DISCOVERY 55, TA Instruments, USA).
Discovery 25
Manufactured by TA Instruments
Sourced in United States
The Discovery 25 is a thermal analysis instrument designed for material characterization. It provides precise measurement of thermal properties such as heat flow and temperature. The instrument is capable of performing a variety of thermal analysis techniques, including differential scanning calorimetry (DSC) and thermogravimetric analysis (TGA).
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5 protocols using discovery 25
1
Thermal Properties Analysis via DSC and TGA
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Thermal Behavior Analysis of API and Polymers
3
Thermal Properties of Starch-Water Suspension
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The thermal properties of LRS samples were determined using a Differential scanning calorimeter (DSC) (Discovery-25, TA Instruments, New Castle, DE, USA). A starch–water suspension having 70% water was loaded into a 40 µL aluminum pan, hermetically sealed, and equilibrated for 1 h at room temperature. The sample pan was then heated from 20 to 250 °C at a rate of 10 °C/min. The onset temperature (To), peak temperature (Tp), conclusion temperature (Tc), and gelatinization enthalpy (∆Hgel) were all determined automatically.
4
Thermal Analysis of Polymer Films
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Differential scanning calorimetry of film samples was performed on DSC (Discovery-25, TA Instruments, New Castle, Delaware, USA). The film sample (8–10 mg) was cut into small cuts, weighed in an aluminum pan, and sealed hermetically. An empty pan was used as a reference. The samples were analyzed over a temperature range of 20 to 200 °C with a heating rate of 10 °C/min. The glass transition temperature (Tg) and enthalpy of melting (ΔHm) were determined from the resulting thermograms.
5
Thermal Analysis of Filler-Binders
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The solid state transitions in the filler-binders were determined by using modulated differential scanning calorimetry (MDSC, Discovery 25, TA Instruments, Zellik, Belgium). This technique separates the total heat flow into reversing and non-reversing signals. Heat capacity related events like glass transition and melting point are displayed in the reversing signals. However, kinetic events like reorganization, enthalpic recovery, water evaporation, decomposition, crystallization and crystal perfection are displayed in the non-reversing signals. A mass between 4,0 and 10,0 mg of each filler-binder was placed in preweighed Tzero pans (TA Instruments, Zellik, Belgium). An empty Tzero pan was used as reference. The heat run was specific for each filler-binder, started at -40 °C and ended at their degradation temperature, which was analyzed by using thermagravimetric analysis (TGA Q50, TA Instruments, Zellik, Belgium). The heat run was set at 10 °C.min -1 and the modulation period and amplitude were rated at 1 min and 1,60 °C, respectively. The heat flow signals were obtained and analyzed by Trios software (TA Instruments).
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