Simultaneously increasing cryogenic strength, ductility and impact resistance of epoxy resins modified by n-butyl glycidyl ether

Short carbon fiber-reinforced composites (SCFRCs) have attracted increasing attention owing to their comprehensive performance and easy processing route. However, the imperfect interfacial adhesion and serious stress concentration at the fiber/matrix interface have hampered their engineering application. In this article, we first report the preparation of SCFRC modified by a low-viscosity liquid hyperbranched epoxy resin (Hyper E102). We then investigated the effect of Hyper E102 content on thermal and mechanical properties. The results show that the overall performance of the SCFRC first increases and then decreases with the increasing content of Hyper E102. With the incorporation of 12 phr Hyper E102, the tensile strength, fracture toughness, notched, and unnotched impact strength of SCFRC were increased by 16.7, 74.9, 95.3, and 194.5%, respectively. The toughening and reinforcing mechanisms were attributed to the following three aspects. First, the Hyper E102 improves the impregna-

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“…The internal stress in the cured systems can be divided into two parts [22]. Each of them has been listed in the following equation.…”

Section: Tensile Propertiesmentioning

confidence: 99%

Effect of hyperbranched epoxy resin on mechanical properties of short carbon fiber-reinforced epoxy composites

et al. 2015

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“…Epoxy resin is one of the most widely used materials in modern industrial areas because of its excellent mechanical and chemical properties [1][2][3]. However, its inherent flammability limits its specific applications.…”

Section: Introductionmentioning

confidence: 99%

Properties of epoxy resin composites containing 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide

Zhang¹,

Zhang²,

Liang³

et al. 2016

Proceedings of the 2015 4th International Conference on Sustainable Energy and Environmental Engineering

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Flame-retardant epoxy resin composites were prepared via in situ polymerization of diglycidyl ether of bisphenol A epoxy monomer and 4,4'-diaminodiphenyl methane, using 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide as additives. The thermal and flame-retardant properties of cured samples were investigated by differential scanning calorimetry, thermogravimetric analysis, limiting oxygen index (LOI), UL-94 vertical burning test, and cone calorimetry. Evaluation of thermal properties demonstrated that the resulting composites achieved high thermal stability with high char yields. Results indicated that the increase in LOI and UL-94 rating was not obvious. The peak of heat release rate of epoxy resin composite containing 15wt.% DOPO was 57.6% less than that of neat epoxy resin. Meanwhile, other flame-retardant parameters were also improved. Scanning electron microscopy was used to study flame retardancy mechanism.

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“…Although the addition of reactive diluents can reduce the viscosity of epoxy resin, such as butyl glycidyl ether [3], allyl glycidyl ether [4], and cyclohexanediol diglycidyl ether [5], they can't improve the low permeability of epoxy slurry, due to the high surface tension of the epoxy slurry itself. Acetone and furfural having low viscosity and epoxy resin can be well dissolved in them to form a homogeneous solution system.…”

Section: Introductionmentioning

confidence: 99%

DSC and curing kinetics study of epoxy grouting diluted with furfural -acetone slurry

Yin

Liu

et al. 2016

IOP Conf. Ser.: Mater. Sci. Eng.

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Abstract. The use of furfural-acetone slurry as active diluents of Bisphenol-A epoxy resin (DGEBA) groutings has been studied by dynamic and non-isothermal DSC for the first time.Curing kinetics study was investigated by non-isothermal differential scanning calorimetries at different heating rates. Activation enery (E a ) was calculated based on Kissinger and Ozawa Methods, and the results showed that E a increased from 58.87 to 71.13KJ/mol after the diluents were added. The furfural-acetone epoxy matrix could cure completely at the theoretical curing temperature of 365.8K and the curing time of 139mins, which were determined by the kinetic model parameters.

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Simultaneously increasing cryogenic strength, ductility and impact resistance of epoxy resins modified by n-butyl glycidyl ether

Cited by 122 publications

References 53 publications

Effect of hyperbranched epoxy resin on mechanical properties of short carbon fiber-reinforced epoxy composites

Effect of hyperbranched epoxy resin on mechanical properties of short carbon fiber-reinforced epoxy composites

Properties of epoxy resin composites containing 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide

DSC and curing kinetics study of epoxy grouting diluted with furfural -acetone slurry

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