Rheokinetics of the curing of epoxy oligomer ED-20 modified with epoxy phosphazenes

Onuchin, Denis V.; Brigadnov, K. A.; Gorbunova, I. Yu.; Сиротин, И. С.; Bilichenko, Yu. V.; Филатов, С. Н.; Kerber, M. L.; Кравченко, Т. П.; Киреев, В. В.

doi:10.1134/s1560090415050103

Cited by 11 publications

(3 citation statements)

References 8 publications

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“…This work is the first one that revealed study of hot curing process of epoxy-amine binder with epoxyphosphazene represented in Figure 1 . However, there are related works [ 10 , 29 ] published by our research group. They were dedicated to the cold curing process of epoxy-amine binder with epoxyphosphazene of that type.…”

Section: Resultsmentioning

confidence: 99%

The Curing Rheokinetics of Epoxyphosphazene Binders

et al. 2020

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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, which finally results in high-density network formation. In cold curing process the bulkiness of epoxyphosphazene molecule and the lack of heat for its motion results in incomplete cure. Thus, in order to cope with these difficulties hot curing systems were proposed and studied.

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Section: Resultsmentioning

confidence: 99%

The Curing Rheokinetics of Epoxyphosphazene Binders

et al. 2020

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“…Figure 6. The TGA curves of the PCEO + MTHPA system cured at 140°C (1) and of the ED-20 + MTHPA system cured at 120°C (2)…”

Section: From the Rheokinetic Curves Inmentioning

confidence: 99%

“…Ongoing investigations into the properties of such oligomers [2,3], in this work a PCEO obtained by the method described earlier [1] and containing 40 wt% epoxyphosphazene and 60 wt% normal epoxy oligomer of type ED-20 formed simultaneously with it was investigated. The initial PCEO had an epoxy number of 16.9 and according to gel permeation chromatography (GPC) data contained a low-molecular-weight fraction with M n = 520 and a high-molecularweight epoxyphosphazene fraction with M n = 2400.…”

mentioning

confidence: 99%

The Processing Properties of a Phosphazene-containing Epoxy Oligomer

Киреев

Simonov-Emel’yanov

Bilichenko

et al. 2017

International Polymer Science and Technology

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The results of investigating the rheological properties and processing characteristics of a system consisting of 60 wt% epoxy bisphenol A resin of type ED-20 and 40 wt% phosphazene-containing epoxy oligomer are given. The kinetic dependences of the shrinkage, residual stresses, and rheokinetics are obtained, and the gelation times, activation energy of viscous flow, and glass transition temperature are determined.

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