Oxidation Induction Period (OIT) of geomembrane measured by DSC

BXT-DSC-600

Introduction to experiment:

Geomembrane is a kind of waterproof barrier material with high polymer as the basic raw material, which is widely used in water conservancy, transportation, construction, environmental protection and other fields. In practical applications, geomembrane may be affected by different environmental factors, among which oxidation is one of the important factors that lead to the degradation of its performance.

What is the Oxidation induction time（OIT）?

Oxidation induction period (OIT) refers to the time when the material begins to undergo automatic catalytic oxidation under high temperature and oxygen conditions.

Why should the oxidation induction period of geomembrane be measured?

Oxidation induction period (OIT) is a key index to measure the oxidation resistance of polymer materials at high temperature, and this test is of great significance for predicting the aging behavior of materials and formulating corresponding maintenance strategies.

DSC experiment

Experimental operation

1. Cut the geomembrane sample to an appropriate size, about 5mg, to ensure that the shape and quality of the sample meet the test requirements.
2. Set the experimental conditions Temperature range: room temperature ~200℃ Heating rate: 10℃/min
3. Air in nitrogen for protection.

Result analysis

The result of DSC test shows that the oxidation induction time of the sample is 153.96min. In the figure, the red curve represents the blank control group, and the blue curve represents the change of heat flow in the sample during the experiment. The obvious change of heat flow occurred in the sample at 153.96min, indicating that the oxidation reaction began to occur.

Sum up

In summary, BXT-DSC-600 differential scanning calorimeter is a helpful assistant for the thermal characteristics analysis of materials, and we can provide guidance for the selection and construction of geomembrae. At the same time, it also provides experimental data support for the modification of geomembrane and the research and development of new materials, and helps the development of scientific research and engineering applications.