How to measure oxidation induction time?
Oxidation-induction time can be known with the use of Differential Scanning Calorimetry measurements, which is done with the sample body and a substance that will be heated in a constant rate in an atmosphere of inert gas.
What is OIT for hdpe?
Oxidation Induction Time ( OIT ) The test is used to assess the level of stabilization of material by determining the time of oxidative decomposition. As a result, polyethylene resin manufacturers normally add stabilizers to improve the resistance of polyethylene to oxidative degeneration.
What is OIT in Polymer?
OIT is the abbreviation for oxidative induction time. It provides information about the oxidative stability of mainly polymer materials. This information is important because plastic parts age throughout their lifetime due to exposure to environmental elements such as heat, oxygen, light and radiation.
What is induction time for paint?
Induction time refers to a period of time that is necessary to initiate a reaction. Induction time allows a chemical reaction to reach a necessary stage. In paint, it is the duration that must elapse after mixing fresh paint material before starting a satisfactory application.
What is oxidation onset temperature?
5.1 Oxidation onset temperature is a relative measure of the degree of oxidative stability of the material evaluated at a given heating rate and oxidative environment, for example, oxygen; the higher the OOT value the more stable the material.
What is an OIT test?
The Oxidation Induction Times Test (OIT), as carried out in a differential scanning calorimeter (DSC), is used to predict thermo-oxidative performance of a material. OIT is a sensitive measure of the level of anti-oxidative additives within the polymer.
What does OIT mean?
|OIT||Office of Information Technology|
|OIT||Oregon Institute of Technology|
|OIT||Oral Immunotherapy (food allergy treatment)|
|OIT||Outsourced Information Technology|
What is induction time and why is it important?
Induction time allows a chemical reaction to reach a necessary stage. In paint, it is the duration that must elapse after mixing fresh paint material before starting a satisfactory application. In pitting corrosion, it is the time interval necessary for initiating the first pit.
What is epoxy induction time?
In fact, many epoxy materials have what is known as an “induction time,” or “sweat-in time,” where the coating is mixed and allowed to react for a period of time (e.g., 30 minutes) so that cross-linking of the components can initiate prior to application of the product.
What does Olt mean?
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|OLT||Optical Line Terminal|
What is mean pit?
1 : a cavity or hole in the ground usually made by digging a gravel pit. 2 : an area set off from and often sunken below surrounding areas a barbecue pit a theater’s orchestra pit. 3 : a small hole or dent on a surface.
How does temperature affect the oxidation induction time?
The higher the isothermal temperature is, the shorter the oxidation induction time becomes. Higher temperature results in a higher rate of oxidization. Figure 3 shows the analysis of Cu influences on the oxidation induction time for PE.
What is the oxidation induction time of PE?
Contrary to the 17 minutes of oxidation induction time of PE, it is 6 minutes in the case that Cu is contacted to PE. It shows that Cu accelerates the oxidization reaction of PE. PE is used as a wire coating material. The oxidation induction time enables the material evaluation considering the catalyst effect of Cu.
How is the oxidative induction time defined in DSC?
Oxidative induction time (OIT) is defined as the time to the onset of oxidation of a test specimen exposed to an oxidizing gas at an elevated isothermal test temperature. In standard DSC, the oxidizing purge gas is initiated once the specimen has stabilized at the isothermal test temperature.
Where does the oxidation of an inert gas start?
This decomposition by the oxidation starts from the low temperature than thermal decomposition in the inert gas. For example of Polyethylene, the oxidation decomposition starts below than 200°C in the air to the contrary of the thermal decomposition from the vicinity of 400°C in the Nitrogen gas.