Crosslinking of fusible polyetherimides during thermal treatment

Koton, M.M.; Frenkel, S.Ya.; Panov, Yu.N.; Bolotnikova, L.S.; Svetlichnyi, V. M.; Shibayev, L.A.; Kulichikhin, S. G.; Krupnova, Ye.Ye.; Reutov, A.S.; Ushakova, I. L.

doi:10.1016/0032-3950(88)90033-0

Cited by 2 publications

(2 citation statements)

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“…As shown in [ 28 ], the behavior of epoxy oligomers with increasing molecular weight, i.e., during the curing process, can be described by the dependency:

where a, b, and c are individual constants of the polymer homologous series (α ≈ 1; β ≈ 3.4–3.5; γ ≈ 4.5), M c is the critical molecular mass at which the nature of the flow of the system changes.…”

Section: Resultsmentioning

confidence: 96%

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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“…As shown in [ 28 ], the behavior of epoxy oligomers with increasing molecular weight, i.e., during the curing process, can be described by the dependency:

Section: Resultsmentioning

confidence: 96%

The Curing Rheokinetics of Epoxyphosphazene Binders

et al. 2020

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“…Water and carbon dioxide can also be released during the crosslinking of PEI [10,11]. If the source of water formation is the reaction of the interaction of hydrogen with oxygen in an oxidizing environment, the source of formation of carbon dioxide as a result of an increase in mobility of imide fragments can be terminal anhydride groups, which, when decomposed, lead to the formation of free terminal radicals involved in the branching and crosslinking processes [12]. Fig.…”

Section: Resultsmentioning

confidence: 99%