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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Irganox® 1076

Using these results and the melting temperature of the forms, we propose an enthalpy H T and a free enthalpy G T diagram Fig. We estimated the transition temperature using the irganoc relationship, which was used quite successfully by other authors: The index 1 represents the polymorph melting at higher temperature. Polymorphism is not always easy to understand and to predict and its comprehension needs the use and association of different analytical techniques.

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In a previous paper, the polymorphism of this compound was studied: Received 21st OctoberAccepted 8th December Are you a distributor who is interested in being listed here? Irganox Worldwide Suppliers of Irganox https: Then isotherms were consecutively realized at For slow heating Fig.

In comparison, the adhesion at AO crystals is lrganox 4 nN Fig. Same phenomenon was observed for the melting of the other forms which began at 1706 As for form III, some initial crystalline structures disappeared see the circles on Fig.


Irganox® by BASF Dispersions & Resins – Paint & Coatings

Moreover it is known that grinding and compression can favour the phase transition process from a metastable to a stable form: It allows to distinguish between the crystallized AO regions from the rest of the sample: However this melting of form III is concomitant to an exothermic peak characteristic of a recrystallization as observed on DSC thermogram.

We considered more specifically in this paper the case of additives contained in a polymer used as a medical device. However, by using the new results presented here, we can suggest another explanation for this aging: We might thus explain the recrystallization into form I from the melt after the melting of forms IV and III by the fact the free enthalpy of form I is below that of the liquid but higher than those of form II and form III at least up to the form III melting temperature.

Irganox an antioxidan primarily used to stabilize various polymers, especially polyamides. Clearsynth has excellent products with fantastic customer service. AFM is proved to be a powerful method for evidencing the slow speed phase transitions.

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. This compound is a phenolic antioxidant currently used in standard polymers; it can 0176 on the surface of polymer-based medical devices and its polymorphism might affect the device surface state and thus the biocompatibility.

Form I should be a metastable form for temperatures lower than the melting temperature of form III. However it was difficult to exclude the previous melting of the form II because it was shown that, at this heating rate, forms I and II have very close melting temperature and enthalpies of fusion.


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A before melting B at the beginning of melting C for an almost melt needle. The initial AO crystal structure is thus strongly modified during these thermal treatments. Do you want a quotation or irganod a question about ‘Irganox ‘? 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.

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The relationship between form I and form II, is more difficult to establish because their enthalpies of fusion were very close. However, the determination of such relations might be very difficult, because some metastable forms are very stable-like at ambient temperature for kinetic reasons and because these transitions can thus be very slow and difficult to 1067 into evidence by differential scanning calorimetry DSC.

The implication of melting of form III needles and its recrystallization into form I on the surface energy was suggested, by hypothesizing that some imperfect small crystals can melt at a little lower temperature than that of the onset melting Irganox Irganox Worldwide Suppliers of Irganox https: 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.

As evidenced in Fig. This kind of effect of the probe at a nanoscale was observed by Perkins et al.

It is indeed well known that surface properties will condition the device biocompatibility and the bioadhesion on it.

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