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.
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AFM is thus a convenient tool for this research. The sample was then heated up to In our case we were interested in the polymorphism of polymer additives, which is a much less studied field, 9—11 but which might have an impact on.
The initial AO crystal structure is thus strongly modified during these thermal treatments. A before melting B at the beginning of melting C for an almost melt needle. However, by 10766 the new results presented here, we can suggest another explanation for this aging: Krganox sorry, but the industry you have selected is not currently available in your chosen language.
In the medical field and, despite its potential importance, the phenomenon of blooming was much less studied than the migration of additives in the body fluids. However, blooming was shown to have an impact on the blood compatibility 18 platelet adhesionprotein adsorption, 19,20 bacterial adhesion 21 and resistance to enzymatic degradation.
When only using classical tools like DSC or FTIR, it is indeed difficult to very early detect changes in structures as they appear at a nano-level on the crystal surface. After ieganox plasma treatment the polymer surface was more 176, but there was a hydrophobic recovery of the surface with time: In a previous paper, 26 the aging behaviour of a catheter after a discharge nitrogen plasma treatment was studied.
Thanks allot for your support and action in time. Then the band of form I kept growing and the form II band absorbance decreased slightly with time. A band characteristic of form I was detected but only with a small absorbance. In comparison, the adhesion at AO crystals is around 4 nN Fig.
Octadecyl DI-tert-butylhydroxyhydrocinnamate | C35H62O3 – PubChem
For slow heating Fig. The relationship between form I and form II, is more difficult to establish because their enthalpies of fusion were very close. Do you want a quotation or have a question about ‘Irganox ‘? 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.
Our former DSC experiments revealed that the phase transitions endured by the studied samples are highly dependent on the heating rates: For a quick heating Fig.
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Are you a distributor who is interested in being listed here? The heating rate used was a quick one till the form III melted. In igranox, personally speaking, I am satisfying with your performance in our needs and I am sure that we will continue our cooperation.
We estimated the transition temperature using the following relationship, which was used quite successfully by other authors: As a consequence, two samples with form III were evaluated by using two relevant heating rates as deduced from the DSC experiments. We normally respond within 2 hours. 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 it was difficult to exclude the previous melting of the form II because it was urganox that, at this heating rate, forms I and II have very close melting temperature and enthalpies of fusion. However this melting of form III is concomitant to an exothermic peak characteristic of a recrystallization as observed on DSC thermogram.
Irganox Worldwide Suppliers of Irganox https: Free Shipping for worldwide on order above USD. The greater variation observed in the enthalpy of fusion for form III could be related to the difficulty of avoiding totally the transitions previously described when melting the form III. This wider melting range might result from a premelting process which occurs because of the presence of impurities in the compound using the rate of melting of the sample, the purity analysis by DSC indicated a purity of It should be noted that the onset of the melting temperature for form III was found at Received 21st OctoberAccepted 8th December We have been clients of theirs for several years and we have an excellent working relationship.
This website provides links to other websites owned by third parties. We observed profiles of the adhesion perpendicular to the melting front of the AO crystal. Our innovative products also help manufacturers in the adhesives, nonwovens and fiber bonding industries meet functional and performance demands. You may choose a language below to continue to this industry or close this dialog above.
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. 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 itganox crystallize on it.