2020
DOI: 10.3390/ma13245685
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The Curing Rheokinetics of Epoxyphosphazene Binders

Abstract: The influence of epoxyphosphazene-modifying additives on the features of the hot curing process of epoxy-amine composition was studied by the rotational viscometry method. The modification caused an acceleration of the curing process, changed rheokinetics of viscosity increase, especially the stage molecular mass growth of linear chains became almost twice shorter for composition with 30% modifier than for unmodified one. We suggest the reason for these changes is the polyfunctionality of epoxyphosphazene, whi… Show more

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Cited by 8 publications
(2 citation statements)
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“…Microkinetic methods give illustrative results, but are far from always unambiguous for assessing changes in the mechanical properties of a material [12][13]. From the point of view of practice, the macrokinetic approach is more effective, based on observing the change in time of one or another integral parameter, which reflects the entire set of chemical and physical transformations that occur during the polymerization of the oligomer [14]. From this point of view, rheological analysis has great potential, which is a method for monitoring the course of the polymerization process; it allows one to identify several essential features of this process.…”
Section: Introductionmentioning
confidence: 99%
“…Microkinetic methods give illustrative results, but are far from always unambiguous for assessing changes in the mechanical properties of a material [12][13]. From the point of view of practice, the macrokinetic approach is more effective, based on observing the change in time of one or another integral parameter, which reflects the entire set of chemical and physical transformations that occur during the polymerization of the oligomer [14]. From this point of view, rheological analysis has great potential, which is a method for monitoring the course of the polymerization process; it allows one to identify several essential features of this process.…”
Section: Introductionmentioning
confidence: 99%
“…Unfortunately, the spectroscopy-based techniques are only limited to the study of the chemical reaction mechanism during curing, and are unable to accurately determine the complicated physical behaviors that occur in the late stages of curing, such as entanglement of molecular clusters, extension of molecular chains and plasticization of adhesives. Some works have also focused on ex situ monitoring instruments based on the analysis of mechanical or viscosity parameters, where the dynamic rheological method, the rotational viscometer, , and the torsional vibration method are several common methods. For the viscometer measurement for curing analysis, the system viscosity increases sharply even infinity and the intermolecular movement is hindered as the curing reaction proceeds, leading to an inability of the method to characterize the behavior of the late stages of curing.…”
mentioning
confidence: 99%