Instrument introduction

Oxidation induction period (OIT) is the time to determine the automatic catalytic oxidation reaction of the sample under high temperature (200 degrees Celsius or other temperature) oxygen conditions, and is an indicator to evaluate the thermal degradation ability of the material in forming processing, storage, welding and use.

The oxidation induction period (OIT) method is a method to test the accelerated aging degree of plastics in high temperature oxygen by using differential thermal analysis (DTA) based on the exothermic reaction when the plastic molecular chain breaks.

Instrument use

The thermal stability experiment during the oxidation induction period is suitable for the national standard GB/T17391-1998, which can continuously record the temperature of the sample, differential thermal analyzer (DTA), differential scanning calorimetry (DSC) or other similar thermal analysis instruments with temperature control accuracy of 0.1℃.

Test method

A small amount of sample is taken and put into the sample rack of the instrument, and oxygen and nitrogen are connected. In the nitrogen state, the temperature is raised from room temperature to 200℃±0.1℃ for 7 minutes at the rate of 20℃/min.

After constant temperature at 200℃ for 7 minutes, the system was quickly switched to oxygen, and the time when the curve changed significantly was recorded, that is, the time of oxidation induction period.

Instrument characteristics

Designed for the measurement of oxidation induction period in plastics and rubber industries, the whole machine is integrated, the temperature control and furnace device are integrated into one, reducing signal loss and interference.

Perfect two-way atmosphere control system, using mass flow controller; During the measurement, nitrogen and oxygen are automatically switched.

The instrument is equipped with standard material, and the user can adjust the temperature range by himself to reduce the error of the instrument.

Intelligent software design, automatic drawing of the instrument, software can realize a variety of data processing (such as DTA peak area and enthalpy calculation, glass transition temperature, oxidation induction period, substance melting point, etc.).

The tangent line can be automatically made to find the crossover point and the actual time from the crossover point to the nitrogen oxygen switch can be directly obtained.

The instrument can automatically generate the experimental report of oxidation induction period.

Large screen LCD display, real-time display of instrument status and data, two sets of temperature measurement couples, one set of couples to display the sample temperature at work, the other set of couples to display real-time furnace temperature (whether the heating furnace is working or not).

The instrument has the function of remote operation, maintenance and adjustment (the instrument can be remotely operated through the Internet).

Instrument index