Crystallization, mechanical, and rheological behavior of polyvinylidene fluoride/carbon nanofiber composites

Vidhate, Shailesh; Shaito, Ali; Chung, Jou-Ku; D’Souza, Nandika Anne

doi:10.1002/app.29413

Cited by 58 publications

(38 citation statements)

References 18 publications

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“…The corresponding increase in the storage modulus ( G ′), is higher than that for loss modulus G ″. It has been reported that the difference between storage modulus of nanocomposites and pure PU is higher at low frequencies, which agrees well with our result where the effect of MWNT loading is much higher at low frequencies. As reported by Vidhate et al ., this behavior can be attributed to different dominant mechanisms of storage modulus enhancement at low and high frequency regions.…”

Section: Resultssupporting

confidence: 93%

“…It has been reported that the difference between storage modulus of nanocomposites and pure PU is higher at low frequencies, which agrees well with our result where the effect of MWNT loading is much higher at low frequencies. As reported by Vidhate et al ., this behavior can be attributed to different dominant mechanisms of storage modulus enhancement at low and high frequency regions. Dimensionally stable carbon nanotube as reinforcement increases the storage modulus at low frequency while, it may control the elastic behavior of the PU as polymer matrix at higher frequencies.…”

Section: Resultssupporting

confidence: 77%

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Polyurethane/amino‐grafted multiwalled carbon nanotube nanocomposites: Microstructure, thermal, mechanical, and rheological properties

Askari

Barikani

Barmar

et al. 2016

J of Applied Polymer Sci

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A mixture of two different polyols, (polytetramethylene ether glycol and polydimethylsiloxane), were employed to synthesize a new structure of polyurethane (PU) with methylene diphenyl diisocyanate (MDI) and 1,4-butanediol as chain extender. PU nanocomposites containing variable amount (0.3, 0.5, 1, and 3 wt %) of amino-grafted multiwalled carbon nanotubes (NH 2 -MWNT) were prepared via in situ polymerization. The dispersion of NH 2 -MWNT into polymer matrix was investigated by scanning electron microscopy (SEM) and transmission electron microscopy (TEM). Fourier transform infrared spectroscopy (FT-IR) confirmed the urethane-urea chemical bonding between the PU chains and the NH 2 -MWNT. Thermal stabilities of the nanocomposites were examined with thermogravimetric analysis (TGA) and the results indicated a remarkable improvement with increasing NH 2 -MWNT contents. The results of dynamic mechanical thermal analysis (DMTA) including storage modulus (E 0 ) and glass transition temperature (T g ), as well as tensile properties demonstrated that the yield strength, strain-at-break, and young modulus were enhanced by increasing NH 2 -MWNT content. Rheological behavior including complex viscosity and storage and loss moduli of the PU nanocomposites improved with increasing NH 2 -MWNT loading, as well.

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Section: Resultssupporting

confidence: 93%

Section: Resultssupporting

confidence: 77%

Polyurethane/amino‐grafted multiwalled carbon nanotube nanocomposites: Microstructure, thermal, mechanical, and rheological properties

Askari

Barikani

Barmar

et al. 2016

J of Applied Polymer Sci

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“…P(VDF-TrFE) is a semi-crystalline thermoplastic polymer with excellent process ability, high mechanical strength, high dielectric permittivity and thermal stability. But its degree of crystallinity was affected by filling it with nanoparticles like carbon nanofiber (CF) [14], carbon nanotubes (CNTs) [15] or nanoclays [16,17]. The mechanical properties are directly linked to the crytallinity ratio.…”

Section: Introductionmentioning

confidence: 99%

Structural and electrical properties of gold nanowires/P(VDF-TrFE) nanocomposites

Lonjon¹,

Laffont²,

Demont³

et al. 2010

J. Phys. D: Appl. Phys.

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High aspect ratio gold nanowires were uniformly dispersed into a P(VDF-TrFE) matrix. The nanowires were synthesized by electrodeposition using nanoporous anodic alumina oxide templates. Intrinsic optical conductivity of gold nanowires was determined by Valence Electron Energy LossSpectroscopy. The effect of increasing volume fraction of Au nanowires on the morphology and crystallization of P(VDF-TrFE) matrix was investigated by Differential Scanning Calorimetry. The crystallinity of P(VDF-TrFE) is strongly depressed by the randomly dispersed nanowires. Above 30 vol % the crystallisation of P(VDF-TrFE) is suppressed. The bulk electrical conductivity of nanocomposite films, at room temperature, obeys a percolation behaviour at a low threshold of 2.2 vol. % and confirmed using surface resistivity value. An electrical conductivity of 100 S.m -1 is achieved for a 3 vol. % filler content.Confidential: not for distribution.

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“…30 The mobilization of the amorphous phase of the matrix is significantly restricted by the spatial orientation of nanofibers, which prevents the dynamic deformation of matrix as a result the stiffness of TPU increases substantially. 31 Figure 10(b) represents typical tear test stressstrain diagrams of the neat TPU and its nanocomposites. Table III shows that the tear strength of the TPU/CNF nanocomposites substantially increases at first up to 10 wt % CNF loading and then decreases at 15 wt % CNF content but still the tear strength is higher than that of neat TPU.…”

Section: Mechanical Propertiesmentioning

confidence: 99%

Preparation and characterization of carbon nanofiber reinforced thermoplastic polyurethane nanocomposites

Barick

Tripathy

2011

J of Applied Polymer Sci

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The effect of CNFs on hard and soft segments of TPU matrix was evaluated using Fourier transform infrared (FTIR) spectroscope. The dispersion and distribution of the CNFs in the TPU matrix were investigated through wide angle X-ray diffraction (WAXD), field emission scanning electron microscope (FESEM), high resolution transmission electron microscope (HRTEM), polarizing optical microscope (POM), and atomic force microscope (AFM). The thermogravimetric analysis (TGA) showed that the inclusion of CNF improved the thermal stability of virgin TPU. The glass transition temperature (T g ), crystallization, and melting behaviors of the TPU matrix in the presence of dispersed CNF were observed by differential scanning calorimetry (DSC). The dynamic viscoelastic behavior of the nanocomposites was studied by dynamical mechanical thermal analysis (DMTA) and substantial improvement in storage modulus (E') was achieved with the addition of CNF to TPU matrix. The rheological behavior of TPU nanocomposites were tested by rubber processing analyzer (RPA) in dynamic frequency sweep and the storage modulus (G') of the nanocomposites was enhanced with increase in CNF loading. The dielectric properties of the nanocomposites exhibited significant improvement with incorporation of CNF. The TPU matrix exhibits remarkable improvement of mechanical properties with addition of CNF. V C 2011 Wiley Periodicals, Inc. J Appl Polym Sci 124: [765][766][767][768][769][770][771][772][773][774][775][776][777][778][779][780] 2012

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Crystallization, mechanical, and rheological behavior of polyvinylidene fluoride/carbon nanofiber composites

Cited by 58 publications

References 18 publications

Polyurethane/amino‐grafted multiwalled carbon nanotube nanocomposites: Microstructure, thermal, mechanical, and rheological properties

Polyurethane/amino‐grafted multiwalled carbon nanotube nanocomposites: Microstructure, thermal, mechanical, and rheological properties

Structural and electrical properties of gold nanowires/P(VDF-TrFE) nanocomposites

Preparation and characterization of carbon nanofiber reinforced thermoplastic polyurethane nanocomposites

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