Crystallization behavior of poly(vinylidene fluoride)/montmorillonite nanocomposite

Yu, Wei; Zhao, Zhongxing; Zheng, Weitao; Long, Beihong; Jiang, Q.; Li, Guangwei; Ji, Xuewu

doi:10.1002/pen.21308

Cited by 38 publications

(26 citation statements)

References 44 publications

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“…The effect of nanoclay on PVDF crystalline structure in films/ thin sheets has been studied by Priya and Jog [5], Shah et al [6], Yu et al [7], Umasankar Patro et al [8], Dillon et al [9], Buckley et al [10], and Pramoda et al [11] (studies 1-7). Samples were manufactured by compression moulding at 190-200°C for few minutes, microinjection into a mould having wall temperature of 95°C, and by film casting followed by compression moulding and isothermal crystallization at 145°C for 1 h. The effect of CNTs on PVDF crystalline structure in films/thin has been studied by Levi et al [12], Zhang et al [13], Wang et al [14], Manna and Nandi [15], Kim et al [16], and W. Huang et al [17] (studies [8][9][10][11][12][13].…”

Section: Nanofilled Pvdf Filmsmentioning

confidence: 96%

Enhancement of β phase crystals formation with the use of nanofillers in PVDF films and fibres

Lund

Gustafsson

Bertilsson

et al. 2011

Composites Science and Technology

130

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Section: Nanofilled Pvdf Filmsmentioning

confidence: 96%

Enhancement of β phase crystals formation with the use of nanofillers in PVDF films and fibres

Lund

Gustafsson

Bertilsson

et al. 2011

Composites Science and Technology

130

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“…Wide angle X‐ray diffraction data are presented in Figure for PVDF‐HFP and PVDF‐HFP nanocomposites containing 1, 3, and 5 wt% GO. From this figure, it can be inferred that PVDF‐HFP exhibits three strong reflections at 2θ = 20.46°, 21.48°, and 23.15° corresponding to the (100), (020), and (110/200) planes of α‐phase, respectively . Moreover, the weak broad peak at 24.33° is related to β‐crystals while the one at 30.86° is due to γ crystals.…”

Section: Resultsmentioning

confidence: 99%

Influence of Graphene Oxide on Crystallization Behavior and Chain Folding Surface Free Energy of Poly(vinylidenefluoride‐co‐hexafluoropropylene)

Choolaei

Goodarzi

Khonakdar

et al. 2017

Macro Chemistry & Physics

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Graphene oxide (GO) filled poly(vinylidene fluoride‐co‐hexafluoropropylene) (PVDF‐HPF) copolymer nanocomposites as promising piezoelectric materials are developed, and their crystallization behavior and chain folding free energy are examined. Appropriate distribution of GO nanoparticles in the copolymer is confirmed by transmission electron microscopic analysis. The crystalline structure of nanocomposites is analyzed by wide‐angle X‐ray scattering and Fourier transform infrared spectroscopy. The results show an increase in the β‐phase content of PVDF‐HPF copolymer in the presence of GO. Non‐isothermal crystallization kinetics of the neat polymer and corresponding nanocomposites are studied by a multiple heating rate differential scanning calorimetry using modified Avrami–Jeziorny and Liu models. Moreover, barrier energy of crystallization is calculated by Friedman and Kissinger models. It is found that addition of GO to the copolymer increases nucleation activity of the nanocomposites. Investigation on linear crystal growth via Hoffman's theorem indicates an enhanced nucleation activity upon increasing GO content. The surface folding free energy of the neat polymer is changed from 5.79 × 10−2 to 7.27 × 10−2 J m−2 upon addition of 5 wt% of GO. A bundle‐like mechanism is proposed, which can explain the crystallite growth. Analysis based on Vyazovkin theorem reveals that the crystallization activation energy is independent of GO at elevated temperatures.

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“…It should be observed that though the properties of polivinylidene fluoride PVDFnanoclay composites have been studied repeatedly [24][25][26][27][28][29][30] there are no information on the properties of PVDF-MCM41 nanocomposites. The interaction of the clay nanoparticles with PVDF has been found to result an increase in the rate of molecular relaxation processes both in the amorphous and in the crystalline phase of the polymer [30].…”

Section: Introductionmentioning

confidence: 95%

Properties of PVDF-MCM41 Nanocomposites Studied by Dielectric, Raman and NMR Spectroscopy

Hilczer¹,

Markiewicz

Połomska

et al. 2014

Ferroelectrics

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To obtain information on the polymer-inorganic filler interactions and on the confinement effect of polymer chains we studied the properties of solution-cast poly(vinylidene fluoride)-MCM41 molecular sieve nanocomposites. The dielectric response of the nanocomposites was found to be determined generally by the response of the polymer matrix, whereas the polymer-filler interactions resulted in an increase of the relaxation rates of the local mode and segmental motions in the amorphous phase of the poly(vinylidene fluoride) matrix. The effect has been related to a reduction of intermolecular correlations between the segments and was confirmed by the dispersion of 1 H spin-lattice relaxation times in PVDF-MCM41 composites. Moreover, the relaxometry experiments have shown that the dynamics of poly(vinylidene fluoride) chains confined to MCM41 molecular sieve channels can be described by tube/reptation model proposed by De Gennes, Doi and Edwards.

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Crystallization behavior of poly(vinylidene fluoride)/montmorillonite nanocomposite

Cited by 38 publications

References 44 publications

Enhancement of β phase crystals formation with the use of nanofillers in PVDF films and fibres

Enhancement of β phase crystals formation with the use of nanofillers in PVDF films and fibres

Influence of Graphene Oxide on Crystallization Behavior and Chain Folding Surface Free Energy of Poly(vinylidenefluoride‐co‐hexafluoropropylene)

Properties of PVDF-MCM41 Nanocomposites Studied by Dielectric, Raman and NMR Spectroscopy

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