2009
DOI: 10.1002/mame.200900098
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A Phase Blending Study on Rubber Blends Based on the Solubility Preference of Curatives

Abstract: Using previously obtained data on the solubilities of curatives in SBR, EPDM and in NBR, different mixing procedures were performed on 50/50 SBR/EPDM and NBR/EPDM blends. In contrast to a previous phase‐mixing study, the curatives were added to separate phases before final blending, in an attempt to control the curative distributions in the blends for optimal mechanical properties. Fillers were not applied in the system to exclude their influence on the dispersion of the curatives. The properties of such blend… Show more

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Cited by 6 publications
(4 citation statements)
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References 11 publications
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“…A preferential migration of CBS into one of the phases could also explain differences in sulfur distribution. Indeed, the process of vulcanization takes several minutes, enough for the curative ingredients to migrate across phases, and it is a matter of interest in the literature. Finally, curing parameters are also important factors that can have an effect on the local kinetics of vulcanization, e.g., the temperature and time, which can promote different cross-link distributions and also reversion of one of the phases. …”
Section: Resultsmentioning
confidence: 99%
“…A preferential migration of CBS into one of the phases could also explain differences in sulfur distribution. Indeed, the process of vulcanization takes several minutes, enough for the curative ingredients to migrate across phases, and it is a matter of interest in the literature. Finally, curing parameters are also important factors that can have an effect on the local kinetics of vulcanization, e.g., the temperature and time, which can promote different cross-link distributions and also reversion of one of the phases. …”
Section: Resultsmentioning
confidence: 99%
“…In dissimilar rubber blends, it is known that solubility difference promotes the migration of the curatives across phase boundaries. In sulfur curing systems, for example, the ratio of accelerators to sulfur in each phase, which determines the efficiency of vulcanization, is hardly in correspondence with the formulation given in the initial recipe, which may result in large cure mismatches 8, 9, 26. Here, the migration of the diacid in the more reactive component of the blend probably accelerates further the specific crosslinking of ENR50 at the expense of ENR10.…”
Section: Resultsmentioning
confidence: 99%
“…Such a treatment triggers crosslinking or chain scission, improving the compatibility between the components of the blend by strengthening the interfacial adhesion. In crosslinkable rubber blends, cure compatibility is another parameter, which may be used to affect the morphology and hence, the mechanical properties of the resulting materials 8, 9…”
Section: Introductionmentioning
confidence: 99%
“…Because of the successful use of Hansen's model in practice, its use has been recently extended for the selection of elastomer cure agents . Despite early promising outcomes, there were divergent results, particularly with regard to the correct values of cure agents and sulfur HSP, which are reassessed in this present contribution to the subject.…”
Section: Introductionmentioning
confidence: 89%