Holandská vývojová společnost hledá odborníky pro experimentální metody určení oxidační stability polymerů

Holandská vývojová společnost a výrobce analytických a laboratorních přístrojů v současné době zkoumá a porovnává experimentální metody pro určení oxidační stability materiálů polymerů s ropnými produkty s konečným cílem vyvinout speciální OIT nástroj (oxygen induction time).
Firma hledá odborné poradenství v teoretické i praktické oblasti.

Description:

Currently the company is studying and comparing experimental methods for determining oxidation stability of materials ranging from polymers to oil products, with the ultimate aim to develop a dedicated OIT (Oxygen Induction Time) instrument. The company seeks guidance from experts in the field who will be able and willing to offer their advice on one or more in this request described issues.
Technical Specifications / Specific technical requirements of the request

On the below listed 6 topics concerning oxidation stability the Dutch SME is looking for additional knowledge and expertise.

1. The company has made the following rough categorization of existing methods. Is it an accurate and complete categorization?
- DSC/DTA-based: OIT (induction time) and OOT (onset temperature)
- Pressure drop in a closed pressure vessel (OIT)
- Chemiluminescence
- Infrared spectroscopy
- TGA-based
- DMA-based

2. The company would like to become more familiar with existing preferences for specific methods, maybe even preferences for a specific type of instrument. What considerations, in terms of reliability, predictive power, robustness, ergonomics, cost, all put against the background of a specific material or application, lead one principle or instrument to be favored over another?

3. A large number of international standards exist for various types of oxidation stability measuring methods. ISO 11357, ASTM D 3895, DIN EN 728, DIN EN 16091, to name but a few. How important is the existence of an international standard for the acceptance of a certain method? Would it be a severe disadvantage if a method is not backed up by a standard of this kind?

4. Most methods rely on some kind of oxidation acceleration mechanism. Since this acceleration is generally far from equivalent to a natural aging process, no clear-cut correlation between test results and stability under real-life conditions exists. How is this issue (and its negative impact on the predictive power of the test) viewed? How are different acceleration parameters - temperature, pressure, O2 concentration, presence of a catalyst, others (?) - weighed against each other?

5. When comparing the DSC/DTA-based techniques OIT and OOT, the general agreement seems to be that OOT is favored over OIT, except in case of high OOT values, for which the resolving power of the test is said to decline, compared to OIT. Is it conceivable that this disadvantage can be circumvented in some way, for instance by lowering the heating rate of the OOT measurement? Would it be correct to state that, if this drawback could be mitigated or even eliminated, OOT would be the undisputed favorite?

6. Several existing instruments, such as DSC's or infrared spectrometers, count oxidation measurement among several other capabilities. Given the existence of these instruments, would an instrument with the sole capacity to measure oxidation stability be considered useful?

Needless to say that any other relevant comment or suggestion would also be highly appreciated.

Organisation/Company
Type: Industry
Size: 11-50
Collaboration Type

* Joint further development
* Testing of new applications


Comments
- Type of partner sought: academia, researcher institutes as well as industry.

- Specific area of activity of the partner: expertise on determination oxidation stability.

- Task to be performed by the partner sought: knowledge transfer.

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