Rheokinetic variations during curing of a tetrafunctional epoxy resin modified with two thermoplastics

Fernández, B.; Corcuera, María Ángeles; Marieta, Cristina; Mondragón, Iñaki

doi:10.1016/s0014-3057(01)00045-3

Cited by 42 publications

(27 citation statements)

References 31 publications

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“…The thermoset reactions are accelerated by thermal effect. Similar final conversions after isothermal curing were observed by Fernandez et al [38] for the tetraglycidyl diaminodiphenyl methane epoxy (TGDDM/DDM/PMMA) system. Fig.…”

Section: Resultssupporting

confidence: 83%

Cure kinetics, morphology and miscibility of modified DGEBA-based epoxy resin – Effects of a liquid rubber inclusion

Thomas¹,

Durix

Sinturel

et al. 2007

Polymer

222

138

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Section: Resultssupporting

confidence: 83%

Cure kinetics, morphology and miscibility of modified DGEBA-based epoxy resin – Effects of a liquid rubber inclusion

Thomas¹,

Durix

Sinturel

et al. 2007

Polymer

222

138

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“…The rheologic property (such as viscosity) is critical for a thermosetting resin in processing as adhesive, paint and composite matrix [21]. The viscosity-temperature relationship was evaluated using a viscometer, and the results are showed in Fig.…”

Section: Synthesis and Characterizations Of The Cornstalk-derived Resmentioning

confidence: 99%

Synthesis of phenolic resol resins using cornstalk-derived bio-oil produced by direct liquefaction in hot-compressed phenol–water

Wang

Leitch

2009

Journal of Industrial and Engineering Chemistry

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“…Assuming that the cross-linking reaction kinetics can be described by a differential equation, the apparent activation energy can be given by the following relation: [38] …”

Section: Activation Energy Of Gel Formationmentioning

confidence: 99%

“…E a ¼ 74 kJ mol 21 , which is similar to the values determined for other systems. [38,40] For example, the values of rheological E a determined by Fernandez et al [38] for tetrafunctional Figure 9. Dependence of t gel on the absolute inverse temperature, 1/T of the cross-linking reaction.…”

Section: Activation Energy Of Gel Formationmentioning

confidence: 99%

Thermal Cross‐Linking of Poly(Vinyl Methyl Ether). II. Rheological Behavior at the Gel Point

Madbouly

Ougizawa

2004

Journal of Macromolecular Science, Part B

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Isothermal time evolution measurements at different constant temperatures (1708C, 1808C, and 1908C) over a wide range of frequency for the thermal cross-linking process of poly(vinyl methyl ether), PVME, have been investigated rheologically. At the onset of cross-linking (t onset ) the elastic storage modulus, G 0 , increases abruptly. The magnitude of the elevation in G 0 and the value of t onset were found to be temperature-dependent. Similar behavior was observed for both the viscous loss modulus, G 00 and the complex dynamic viscosity, h Ã ; however, the value of G 00 shows a very low sensitivity to the cross-linking process compared to G 0 and h Ã at the same experimental conditions. The gel point, t gel , was evaluated from the point of intersection in plots of tan d vs. curing time for different constant shear frequencies. At the gel point tan d is no longer frequency-dependent, and all curves cross-over, indicating the validity of the Winter -Chambon criterion. The value of t gel obtained from the coincidence of G 0 and G 00 was about 10 min longer than that determined from tan d vs. t, indicating that the crossover of G 0 and G 00 is not be considered as a general method for evaluation of t gel . The value of the apparent activation energy of gelation determined from the temperature dependence of t gel was 74 kJ mol 21 in good agreement with literature values for other different systems. At the gel point G 0 and G 00 showed a power law with shear frequency, i.e., G 0 G 00 v n with critical exponents equal to 0.64 and 0.75, respectively, in close agreement with the percolation theory (n ¼ 2/3). The 655 ORDER REPRINTS zero shear viscosity, h 0 , and the equilibrium shear modulus, G eq , can also be expressed in power low scaling functions with the relative distance from the gel point, 1 i.e., h 0 1 2k and G eq 1 z with k ¼ 1.3 and z ¼ 2.4 in good agreement with the predicted values based on the percolation theory.

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Rheokinetic variations during curing of a tetrafunctional epoxy resin modified with two thermoplastics

Cited by 42 publications

References 31 publications

Cure kinetics, morphology and miscibility of modified DGEBA-based epoxy resin – Effects of a liquid rubber inclusion

Cure kinetics, morphology and miscibility of modified DGEBA-based epoxy resin – Effects of a liquid rubber inclusion

Synthesis of phenolic resol resins using cornstalk-derived bio-oil produced by direct liquefaction in hot-compressed phenol–water

Thermal Cross‐Linking of Poly(Vinyl Methyl Ether). II. Rheological Behavior at the Gel Point

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