Manufacturing and mechanical properties of soy-based composites using pultrusion

Zhu, Jiang; Chandrashekhara, K.; Flanigan, V. J.; Kapila, Shubhender

doi:10.1016/j.compositesa.2003.08.007

Cited by 53 publications

(29 citation statements)

References 5 publications

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“…Erhan and co‐workers13 reported the solid freeform fabrication of epoxidized soybean oil/epoxy composites with several amine curing agents. Chandrashekhara and co‐workers14, 15 reported the manufacture and mechanical properties of soy‐based composites. Kobayashi and co‐workers16, 17 also reported the preparation of green nanocomposites from renewable resources.…”

Section: Introductionmentioning

confidence: 99%

Thermomechanical behavior of epoxy resins modified with epoxidized vegetable oils

Jin

Park

2008

Polymer International

109

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Biobased epoxy materials were prepared from diglycidyl ether of bisphenol A (DGEBA) and epoxidized vegetable oils (EVOs) (epoxidized soybean oil and epoxidized castor oil) with a thermally latent initiator. The effects of EVO content on the thermomechanical properties of the EVO‐modified DGEBA epoxy resins were investigated using several techniques. Differential scanning calorimetry indicated that the cure reaction of the DGEBA/EVO systems proceeded via two different reaction mechanisms. Single and composition‐dependent glass transition temperature (Tg) mechanisms were observed for the systems after curing. The experimental values of Tg could be explained by the Gordon–Taylor equation [Gordon M and Taylor JS, J Appl Chem 2:493 (1952)]. The thermal stability of the systems decreased as the EVO content increased, due to the lower crosslinking density of the DGEBA/EVO systems. The coefficient of thermal expansion of the systems was found to increase linearly with increasing EVO content. This could be attributed to the fact that the degrees of freedom available for motions of the segments of the macromolecules in the network structure were enhanced by the addition of EVO. Copyright © 2008 Society of Chemical Industry

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Section: Introductionmentioning

confidence: 99%

Thermomechanical behavior of epoxy resins modified with epoxidized vegetable oils

Jin

Park

2008

Polymer International

109

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“…Chandrashekhara et al reported the preparation and mechanical properties of fiber/epoxy composites using chemically modified soy-based epoxy resins. 7 Erhan et al demonstrated the preparation of soybean oil/epoxy-based composites by solid freeform fabrication methods. 8 Miyagawa et al presented the thermo-physical and impact properties of an epoxy resin/epoxidized linseed oil (ELO) system using poly(oxypropylene) triamine as a curing agent.…”

Section: Introductionmentioning

confidence: 99%

Thermal stability and impact and flexural properties of epoxy resins/epoxidized castor oil/nano-CaCO3 ternary systems

2010

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Epoxy ternary systems were prepared from the diglycidylether of bisphenol-A (DGEBA), epoxidized castor oil (ECO), and nano-CaCO 3 using a thermally latent initiator. The effects of ECO and the nano-CaCO 3 contents on the thermal stability and mechanical interfacial properties of the prepared DGEBA/ECO/nano-CaCO 3 ternary systems were examined by thermogravimetric analysis (TGA), Izod impact tests, and mechanical tests. The morphology of the ternary systems was examined by scanning electron microscopy (SEM) and transmission electron microscopy (TEM). The statistic heat-resistant index temperature (T s ) of the ternary systems was approximately constant up to 30 wt% ECO, and thereafter decreased with increasing ECO content. The impact strength of the ternary systems was improved by the addition of ECO and nano-CaCO 3 . The flexural strength of the ternary systems exhibited a maximum value at 20 wt% ECO. SEM showed that shear deformation occurred, which prevented the propagation of cracks in the DGEBA/ECO/nano-CaCO 3 ternary systems.

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“…It is widely known that the degree of unsaturation provides an easier way for synthesis . Zhu et al reported through experimental investigations that the pultrusion epoxy resin formulation may contain a maximum of 0.3 g/g (30 wt %) epoxy resin with epoxidized soybean oil to retain or improve the mechanical properties. The isothermal cure kinetic is chosen for this work for its ability to generate heat flow as a function of time in the absence of thermal gradients during the processing stage …”

Section: Introductionmentioning

confidence: 99%

Cure kinetics characterization of soy‐based epoxy resins for infusion moulding process

et al. 2016

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This study presents the kinetics of the reaction of diglycidyl ether of bisphenol A (DGEBA) based epoxy resin in the presence of epoxidized soybean oil (ESO) cured with triethylene tetramine (TETA). An isothermal differential scanning calorimetric (DSC) study is carried out to propose a model to analyze the cure kinetics of bio‐based resin. The proposed model is also compared with the Kamal model. The results clearly highlight that the proposed model attains a reasonable percentage of improvement in predicting cure data. Adding ESO to the conventional system decreases the reaction enthalpy and increases the activation energy of the system. The outcome of the study confirms the feasibility of the proposed material system for an infusion process. Further, tensile property improvement is obtained through using an infusion process for the proposed material system.

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Manufacturing and mechanical properties of soy-based composites using pultrusion

Cited by 53 publications

References 5 publications

Thermomechanical behavior of epoxy resins modified with epoxidized vegetable oils

Thermomechanical behavior of epoxy resins modified with epoxidized vegetable oils

Thermal stability and impact and flexural properties of epoxy resins/epoxidized castor oil/nano-CaCO3 ternary systems

Cure kinetics characterization of soy‐based epoxy resins for infusion moulding process

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