Heat of Reaction, Cure Kinetics, and Viscosity of Araldite LY-556 Resin

Seifi, Rahman; Hojjati, Mehdi

doi:10.1177/0021998305048738

Cited by 21 publications

(10 citation statements)

References 7 publications

(29 reference statements)

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“…R is the gas constant (8.314 J/mol/K) and T is the absolute temperature. The kinetic parameters of the curing reaction, with special reference to E a, can be calculated using different computational methods [8][9][10][11]. E a is determined by the isoconversional methods using the logarithmic form of the kinetic equation (2):…”

Section: Kinetic Modelsmentioning

confidence: 99%

Cure Kinetics and Activation Energy Studies of Modified Bismaleimide Resins

Chandran¹,

Krishna²,

Rai

et al. 2012

ISRN Polymer Science

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The cure kinetics and activation energy (Ea) of bismaleimide homopolymer and modified bismaleimide resin systems with different chain extenders were investigated. The bismaleimide resin under investigation was bismaleimidodiphenyl methane (BMPM) and the chain extenders were (i) O-O diallyl bisphenol A (DABA) and (ii) methylenedianiline (MDA). Dynamic multiheating DSC method was used to study the kinetics of the curing process. Activation energies were determined for both unmodified and modified resins from nonisothermal multiheating rate DSC tests by using Ozawa and Kissinger models. Activation energy for BMPM homopolymer increased from 95 kJ/mol to 125 kJ/mol as a function of conversion. For the MDA-modified system the activation energy was independent of percentage conversion, at 108 kJ/mol. In the case of DABA-modified bismaleimide the activation energy increased steadily at 6 kJ/mol from 10 to 100% conversion.

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Section: Kinetic Modelsmentioning

confidence: 99%

Cure Kinetics and Activation Energy Studies of Modified Bismaleimide Resins

Chandran¹,

Krishna²,

Rai

et al. 2012

ISRN Polymer Science

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“…Hence, complete understanding of resin flow and cure reaction of nanomodified epoxy is important for successful design and manufacture of composite structures. Extensive studies related to cure kinetics of resins have been mentioned in the previous literature [44][45][46][47][48][49][50]. However, the effects of graphene nanofillers on composite processing using liquid molding techniques such as the RI process have not been investigated in detail yet.…”

Section: Introductionmentioning

confidence: 99%

The effect of graphene oxide (GO) nanoparticles on the processing of epoxy/glass fiber composites using resin infusion

Umer

Dong

et al. 2015

Int J Adv Manuf Technol

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In this paper, the effects of graphene oxide (GO) nanoparticles on glass fiber composite processing by incorporating them into epoxy resin were investigated. GO was synthesized from graphite powder and was mixed with epoxy resin. Three different GO contents of 0.05, 0.1, and 0.2 wt% were used. Epoxy/GO samples were tested for rheology and cure kinetics to evaluate the effects of GO content on important resin infusion processing parameters. The results show that adding GO to neat epoxy resin increased the viscosity and affected the resin cure reaction by reducing the resin gel time. After that, glass fiber composites were prepared using the resin infusion process. Samples with 0.2 wt% GO result in very slow resin infiltration time with premature resin gelation. A 30 % increase in flexural strength and a 21 % increase in flexural modulus are manifested by adding GO as the secondary reinforcement to glass fiber composites.

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“…Multifunctional hardeners are added to the resin to form a threedimensional network. Typical hardeners are primary amines [3][4][5] and anhydrides [6][7][8][9]. The hardener type, the hardener concentration and the thermal curing procedure affect the curing process of epoxy resins.…”

Section: Introductionmentioning

confidence: 99%