Irganox is a high molecular weight phenolic antioxidant. CAS# Click here for quote or sample. Irganox® highly efficient, non-discoloring, sterically hindered primary phenolic antioxidant stabilizer that protects organic substrates against. Get instant access to Irganox® technical datasheet. It is a highly efficient sterically hindered phenolic primary antioxidant which provides processing and.
|Genre:||Health and Food|
|Published (Last):||13 November 2014|
|PDF File Size:||19.82 Mb|
|ePub File Size:||16.77 Mb|
|Price:||Free* [*Free Regsitration Required]|
Polymorphism is not always easy to understand and to predict and its comprehension needs the use and association of different analytical techniques. We estimated the transition temperature using the following relationship, which was used quite successfully by other authors: The enthalpy of fusion of the form III which melt at lower temperature than forms I and II was greater than those of the two other forms Table 1. In general, personally speaking, I am satisfying with your performance in our needs and I am sure that we will continue our cooperation.
For a quick heating Fig. The sample was heated slowly. Form I should be a metastable form for temperatures lower than the melting temperature of form III. For form I Fig.
Increasing the temperature of several degrees had a deep impact on the phase transformation kinetics: A before melting B at the beginning of melting C for an almost melt needle.
Octadecyl DI-tert-butylhydroxyhydrocinnamate | C35H62O3 – PubChem
In a previous paper, the polymorphism of this compound was studied: The lowest adhesion values were obtained for the crystallized AO regions. Do you want a quotation or have a question about ‘Irganox ‘? This compound is a phenolic antioxidant currently used in standard polymers; it can bloom on the surface of polymer-based medical devices and its polymorphism might affect the device surface state and thus the biocompatibility.
However, by using the new results presented here, we can suggest another explanation for this aging: This may be the high-temperature stable form before melting; however, as the forms I and II have very close enthalpies of fusion, it is thus not trivial to conclude about a monotropic or enantiotropic transition between them.
Clearsynth has excellent products with fantastic customer service. No melting phenomenon occurred during this process as shown by the adhesion measurements Fig. The content of such third party sites is not within our control, and we cannot and will not take responsibility for the information or content. The initial AO crystal structure is thus strongly modified during these thermal treatments. A band characteristic of form I was detected but only with a small absorbance.
We have been clients of theirs for several years and we have an excellent working relationship.
When the heating was quicker, as studied in one of our precedent paper, 13 only the melting of form II was observed. Moreover it is known that grinding and compression can favour the phase transition process from a metastable to a stable form: Irganox an antioxidan primarily used to stabilize various polymers, especially polyamides.
There was a problem providing the content you requested
Are you a distributor who is interested in being listed here? Spectra of form I and melt powder are given as references. From using DSC enthalpy of fusion of the forms, this transition is certainly an enantiotropic relationship between the low temperature stable form III and the form II. For others the transition needs the forming of critical nuclei of the new phase, such as local defects: You may choose a language below to continue to this industry or close this dialog above.
Same phenomenon was observed for the melting of the other forms 11076 began at around Images correspond to the height images presented on the Fig.
We observed profiles of the adhesion perpendicular to the melting front of the AO crystal. These changes were particularly well observed in case of very slow heating ramps or isotherms performed between 42 and As a consequence, two samples with form III were evaluated by using two relevant heating rates igranox deduced from the DSC experiments.
10766 I would applaud your continues support in same manner to achieve organisation goals in coming future. This kind of effect of the probe at a nanoscale was observed by Perkins et al. By studying adhesion force image Fig. FTIR revealed the growth of form I and the transformation of form III to the liquid state even if the band characteristics of this liquid state is very close to that of form I.
Irganox® by BASF Dispersions & Resins – Paint & Coatings
This website provides links to other websites owned by third parties. Our innovative products also help manufacturers in the adhesives, nonwovens and fiber bonding industries meet functional and performance demands.
The enthalpy of fusion of form II is a little higher than that of form I and krganox melting point a little lower, what would be consistent with the fact that form I is the stable form at high temperature. In a previous paper, 26 the aging behaviour of a catheter after a discharge nitrogen plasma treatment was studied. This product is in stock and can be shipped to “US” iganox if purchased online.
As shown by the adhesion measurement, no liquid areas were detected during the first moments of the process images 1—13 from Fig. However this melting of form III is concomitant to an exothermic peak characteristic of a recrystallization as observed irganos DSC thermogram. Many additives such as antioxidants AO can indeed bloom 12—15 that is to say they can migrate through the polymer bulk to the surface, exudate and crystallize on it.
In our case we were interested in the polymorphism of polymer additives, which is a much irrganox studied field, 9—11 but which might have an impact on.