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Oxidation induction time or OIT is a standardized test performed in a DSC ( Differential scanning Calorimeter) which measures the level of thermal stabilization of the material tested. The time between melting and the onset of decomposition in isothermal conditions is measured. The atmosphere is nitrogen up to melting and then oxygen. The typical temperature is 190-220 °C.
UT3335 Differential scanning calorimeter is one kind of thermal analysis method instrument, under controlled temperature, check the relation of temperature with the rate differential input in test sample and reference articles. The curve recorded is DSC curve, heat flow rate dH/dt is Y-axis, temperature T or time t is X-axis, can measure various kind of thermodynamics and kinetic parameter, like specific heat capacity, reaction heat, heat of transformation, phase diagram, reaction rate, cystallization rate, sample purity etc., with wide temperature range (-100~800℃), high resolutions, less sample using. Used to test inorganic material, organic compounds, pharmaceutical analysis etc., can be used to do Oxidative Induction Time test, heat stability, glass transition temperature, melting point, cold crystallization, crystallization, phase transition, etc.,
Conform to standard EN 728. ISO 11357-6, ASTM D3417.
Temperature range | Room temperature ~ 600°C (air cooling) |
Heating rate | 0.1~100°C/min |
Temperature resolution | 0.01°C |
Temperature 0.1 ℃ accuracy | ±0.01°C |
Temperature repeatability | ±0.1°C |
Constant temperature time | program setting |
Temperature control mode | PID temperature control, temperature rise, constant temperature (automatic program control) |
Atmosphere control gas | nitrogen, oxygen (automatic switching of instrument) |
Gas flow | 0-300mL/min |
Gas pressure | 0.2MPa |
The measuring range | 0～±600mW |
DSC resolution | 0.01μW |
DSC sensitivity | 0.001μW |
Display mode | 24bit color, 7 inch LCD touch screen display |
Data interface | standard USB interface |
Parameter standard | equipped with standard materials (indium, tin), users can correct the temperature by themselves |
Curve scanning | temperature rise scan, cooling scan, constant temperature scan |
Display | Large LCD screen Engligh With English software, can install on user’s computer |
Power | 220V, 50HZ |
The instrument has multiple sets of thermocouples, one set to test the sample temperature, and one group to test the internal ambient temperature of the instrument. The instrument has multi-point correction function, which can meet the accurate testing of high, medium and low samples The software can set the data acquisition frequency, and can export EXECL data packages and PDF reports | |
BS EN 728
Plastics piping and ducting systems. Polyolefin pipes and fittings. Determination of oxidation induction time.
ISO 11357-6:2018
Plastics -- Differential scanning calorimetry (DSC) -- Part 6: Determination of oxidation induction time (isothermal OIT) and oxidation induction temperature (dynamic OIT)
ASTM D3417
Standard Test Method for Enthalpies of Fusion and Crystallization of Polymers by Differential Scanning Calorimetry (DSC)