HYD oxidation induction period analyzer Introduction
Oxidation induction period (OIT) is the time to measure the autocatalytic oxidation reaction of a sample under high temperature (200 ° C or other temperature) oxygen. It is an index to evaluate the thermal degradation resistance of materials during forming, storage, welding and use. . The oxidation induction period (OIT for short) method is a method that uses differential thermal analysis (DTA) to test the degree of accelerated aging of plastics in high-temperature oxygen based on the exothermic reaction when plastic molecular chains break.
The thermal stability test during the oxidation induction period is applicable to the national standard GB / T17391-1998, the differential thermal analyzer (DTA), differential scanning calorimetry (DSC) or other similar thermal analysis instruments that can continuously record the temperature of the sample. The temperature control accuracy is 0.1 ℃.
experiment method:
1. Take a small amount of sample and place it in the sample rack of the instrument, switch on oxygen and nitrogen; under the nitrogen state, heat up from room temperature to 200 ° C ± 0.1 ° C at a rate of 20 ° C / min and keep constant temperature for 7 minutes.
2. After being kept at 200 ℃ for 7 minutes, it was quickly switched to oxygen, and the time when the curve changed significantly was recorded as the oxidation induction period. Features
1. Designed for measuring the oxidation induction period in the plastic and rubber industries. The whole machine is integrated to integrate the temperature control and the furnace device to reduce signal loss and interference.
2. Perfect two-way atmosphere control system, adopting mass flow controller; during the measurement, nitrogen and oxygen are automatically switched.
3. The instrument is equipped with standard substances, and the user can perform the calibration of each temperature section to reduce the error of the instrument.
4. Intelligent software design, automatic drawing of the instrument throughout the process, the software can realize various data processing (such as calculation of DTA peak area and enthalpy, glass transition temperature, oxidation induction period, melting point of substances, etc.)
5. The tangent can be made automatically, the intersection can be found and the actual time from the intersection to the nitrogen-oxygen switching can be obtained directly.
6. The instrument can automatically generate the experimental report of the oxidation induction period.
7. Large-screen liquid crystal display, real-time display of the instrument status and data, two sets of temperature measuring couples, one set of couples shows the sample temperature during work, and the other set of couples shows the furnace temperature in real time (regardless of whether the furnace works or not).
8. The instrument has remote operation, maintenance, and adjustment functions (the instrument can be operated remotely through the Internet). Technical Parameters
Temperature data
Temperature range: room temperature to 1150 ° C
Temperature accuracy: ± 0.1 ℃
Heating rate: 0.1 ℃ / min- 80 ℃ / min
Temperature repeatability: ± 0.1 ℃
Special feature
Temperature control method: heating, constant temperature (program automatic control)
Display mode: Large screen LCD display of Chinese characters
Atmospheric system: nitrogen, oxygen automatic switching
Gas flow rate: 10 ～ 200 mL / min
Differential thermal data
Measurement range: ± 10 μv ～ ± 2000μ v
DTA resolution: 0.01μ v
DTA noise: ＜ 0.01 vμ
Crucible volume: 0.06ml
DSC data
Measurement range: ± 100mw
Minimum resolution: ± 0.1 w
Power noise: ± 0.1 w
Power accuracy: ± 0.1 w
Introduction
Oxidation induction period (OIT) is the time to measure the autocatalytic oxidation reaction of a sample under high temperature (200 ° C or other temperature) oxygen. It is an index to evaluate the thermal degradation resistance of materials during forming, storage, welding and use. . The oxidation induction period (OIT for short) method is a method that uses differential thermal analysis (DTA) to test the degree of accelerated aging of plastics in high-temperature oxygen based on the exothermic reaction when plastic molecular chains break.
The thermal stability test during the oxidation induction period is applicable to the national standard GB / T17391-1998, the differential thermal analyzer (DTA), differential scanning calorimetry (DSC) or other similar thermal analysis instruments that can continuously record the temperature of the sample. The temperature control accuracy is 0.1 ℃.
experiment method:
1. Take a small amount of sample and place it in the sample rack of the instrument, switch on oxygen and nitrogen; under the nitrogen state, heat up from room temperature to 200 ° C ± 0.1 ° C at a rate of 20 ° C / min and keep constant temperature for 7 minutes.
2. After being kept at 200 ℃ for 7 minutes, it was quickly switched to oxygen, and the time when the curve changed significantly was recorded as the oxidation induction period.
