Structure-properties relationships for densely cross-linked epoxide-amine systems based on epoxide or amine mixtures

Morel, E.; Bellenger, V.; Bocquet, Michaël; Verdú, J.

doi:10.1007/bf00660934

Cited by 56 publications

(43 citation statements)

References 14 publications

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“…The elastic constants of interfacially polymerized polyamide layers are not well known but we estimate Y = 2 GPa and = 0.35 from studies of closely related materials [34,35]. As discussed above, the data for the two RO membrane active layers, see Fig.…”

Section: Resultsmentioning

confidence: 99%

Absorption of water in the active layer of reverse osmosis membranes

Zhang

Cahill

Coronell

et al. 2009

Journal of Membrane Science

114

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Section: Resultsmentioning

confidence: 99%

Absorption of water in the active layer of reverse osmosis membranes

Zhang

Cahill

Coronell

et al. 2009

Journal of Membrane Science

114

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“…Moreover, an extrasonic wave propagation are reported for uncatcellent agreement is evidenced between our series alyzed networks in Table II. Increasing the crossof cyanate networks and various series of epoxy/ link density has the same effect on the different amine networks 17 (Fig. 4).…”

Section: Ea4mentioning

confidence: 87%

Effects of crosslink density on mechanical properties of high glass transition temperature polycyanurate networks

Georjon

Galy

1997

J. Appl. Polym. Sci.

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Polycyanurate networks of different architecture were synthesized using different curing cycles. Networks with a variable extent of reaction were obtained; the small variation of the cyanate conversion (0.8 to 1) corresponds to a large variation of glass transition temperature (150-290ЊC) and crosslink density. The mechanical behavior at small and large deformations and the fracture toughness were examined at room temperature and related to the network structural parameters. To explain the puzzling variation of the yield stress and yield strain with the cyanate conversion, recovery experiments were conducted to discriminate anelastic deformation from plastic deformation.

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“…Ainsi, le module elastique ultrasonore a ete recernrnent relie a la densite d'energie cohesive et sa dependance avec I'absorption d'eau par le reseau a ete analysee (25). De rn&rne.…”

Section: Perspectivesunclassified

Relations Entre Structure Chimique Et Propriétés Mécaniques Dans Les Réseaux Époxydes

Halary¹,

Cukierman²,

Monnerie³

1989

Bulletin des Soc Chimique

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Relationships existing between chemical structure and the dynamic mechanical properties of epoxide networks are reviewed. This paper is focused on different model networks, prepared by the reaction between amines and DGEBA or DGEBD diepoxide monomers in stoichiometric proportions. The limit glass transition temperature, Tg, , is shown to depend mainly on molecular flexibility of network chains and on crosslink density. Frequency dependence of Tg, obeys the time-temperature superposition principle and can be described by a WLF-type equation. However, the coefficients C1 and C2 in this equation depend on the molecular characteristics of the network, in agreement with free volume concepts. Values of elastic modulus well above Tg reflect mostly the influence of crosslink density. Surprisingly to some extent, application of rubber elasticity theory to these densely crosslinked systems yields very reasonable average network chain molecular weights Mc. In the glassy region, the mechanical relaxationsp and y are shown to originate from motions of -CH2-CHOH-CH2-0-epoxide groups and of -(CH2)4-groups, respectively. Motions responsible for the @-relaxation appear at the same temperature, whatever the network characteristics may be. On the other hand, both amplitude and broadening of the p-relaxation loss peak are functions of crosslink density, From a practical viewpoint, these two characteristics influence markedly the plastic behavior of the networks and their elastic modulus at room temperature as well.

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Structure-properties relationships for densely cross-linked epoxide-amine systems based on epoxide or amine mixtures

Cited by 56 publications

References 14 publications

Absorption of water in the active layer of reverse osmosis membranes

Absorption of water in the active layer of reverse osmosis membranes

Effects of crosslink density on mechanical properties of high glass transition temperature polycyanurate networks

Relations Entre Structure Chimique Et Propriétés Mécaniques Dans Les Réseaux Époxydes

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