Role of Temperature and Carbon Nanotube Reinforcement on Epoxy based Nanocomposites

Samal, Subhranshu Sekhar

doi:10.4236/jmmce.2009.81003

Cited by 14 publications

(15 citation statements)

References 17 publications

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“…This is attributed to the viscoelastic nature of the polymer chains, wherein molecular vibrations begin to increase allowing the chains to stretch without much loss in their load carrying capacity. [17][18][19][20] In addition, the toughness values of CNT modified epoxies are higher than those of the unmodified epoxy at temperatures below T g .…”

Section: Figs 3(a)-3(c)mentioning

confidence: 93%

Influence of temperature on tensile behavior of multiwalled carbon nanotube modified epoxy nanocomposites

et al. 2014

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An investigation was carried out to characterize the tensile behavior of multiwalled carbon nanotube (MWCNT) modified epoxy nanocomposites in the glassy, viscoelastic, and rubbery regimes. 1 and 2 wt% MWCNT predispersed epoxy was used in this study. The cured samples were characterized using dynamic mechanical analysis for selection of different temperatures. The stress-strain behavior and toughness were determined in the temperature band of 25-140°C. Addition of 1% CNT resulted in 16% improvement in the storage modulus at glassy state but 6% reduction in storage modulus was seen for 2% CNT-epoxy system. Tensile results showed that the strength and modulus have improved for 1% CNT-epoxy system. This study also revealed that for all the three systems, failure strain was maximum near the glass transition temperature (T g ) and significantly reduced above T g . Also the CNT-modified epoxies showed improved toughness.

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Section: Figs 3(a)-3(c)mentioning

confidence: 93%

Influence of temperature on tensile behavior of multiwalled carbon nanotube modified epoxy nanocomposites

et al. 2014

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“…The increase in the values of impact strength is due to the minimum percentage (<1 wt%) concentration and the homogeneous dispersion of nanoscaled MWCNT in the brittle DGEBA epoxy. The homogeneous dispersion makes MWCNT surfaces available for interaction with the surrounding epoxy matrix and hence the applied load is effectively absorbed by the MWCNT from epoxy matrix [28,29] . Of all the systems, the MWCNT-reinforced CB DDM -modified epoxy systems, exhibit higher improvement in the values of impact strength due to the influence of load bearing capacity of MWCNT and rich molecular design flexibility of CB DDM with epoxy resin.…”

Section: Characterizationsmentioning

confidence: 99%

Influence of Multiwalled Carbon Nanotubes on Mechanical, Thermal and Electrical Behavior of Polybenzoxazine-Epoxy Nanocomposites

Chozhan

Chandramohan

Alagar

2014

Polymer-Plastics Technology and Engineering

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Multiwalled carbon nanotubes (MWCNT)-reinforced polybenzoxazine-epoxy nanocomposites were prepared via the solvent method and were investigated for their thermal, thermo-mechanical, mechanical, electrical and morphological properties. Epoxy resin (DGEBA) was modified with 5, 10 and 15 wt.% of benzoxazines using 4,4 0 -diaminodiphenylmethane as a curing agent at appropriate conditions. Epoxy and benzoxazines-modified epoxy systems were further reinforced with 0.25, 0.50 and 0.75 wt.% of surface-modified MWCNT. MWCNT-reinforced polybenzoxazineepoxy nanocomposites exhibited better thermal, mechanical and dielectric properties. Dispersion of MWCNT in benzoxazine-epoxy resins and nanostructure of the composites was confirmed by transmission electron microscopy analysis.

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“…Also in [17], a second thermal transition above the glass transition which was noted for samples in excess of 20 wt% fumed silica, was attributed to the polymer closely interacting with the silica filler, ie what is termed bound polymer. Recently, it was pointed out that nanofillers can constrain the mobility of polymer chains as well as their relaxation spectra, which can change the glass transition temperature and modulus of the matrix [18].…”

Section: Model Of Tsagaropoulosmentioning

confidence: 99%

On Two Nanocomposite Models: Differences, Similarities and Interpretational Possibilities Regarding Tsagaropoulos' Model and Tanaka's Model

Danikas¹

2010

Journal of Electrical Engineering

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Nanocomposites consist nowadays a major field of research. This paper investigates the interpretational possibilities of two models developed, namely, Tsagaropoulos' model and Tanaka's model. The two models were developed separately and independently from each other. They both consider various layers around the nanoparticles. They both consider well bonded and more loosen layers. Similarities and differences between the two models are pointed out as well as possibilities for further research in order to shed light on some aspects of electrical phenomena in these materials.K e y w o r d s:

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Role of Temperature and Carbon Nanotube Reinforcement on Epoxy based Nanocomposites

Abstract: This paper presents the synthesis of epoxy based Multiwalled Carbon nanotubes (MWCNTs

Cited by 14 publications

References 17 publications

Influence of temperature on tensile behavior of multiwalled carbon nanotube modified epoxy nanocomposites

Influence of temperature on tensile behavior of multiwalled carbon nanotube modified epoxy nanocomposites

Influence of Multiwalled Carbon Nanotubes on Mechanical, Thermal and Electrical Behavior of Polybenzoxazine-Epoxy Nanocomposites

On Two Nanocomposite Models: Differences, Similarities and Interpretational Possibilities Regarding Tsagaropoulos' Model and Tanaka's Model

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