Crystallization of PVDF in the PVDF/PMMA blends precipitated from their non-solvents: Special “orientation” behavior, morphology, and thermal properties

Zhao, Xuejuan; Chen, Shuangjun; Zhang, Jun; Zhang, Wei; Wang, Xiaolin

doi:10.1016/j.jcrysgro.2011.06.036

Cited by 53 publications

(19 citation statements)

References 32 publications

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“…Gregorio et al47 found that the β‐phase PVDF shows similar melting temperature with α‐phase. Zhao et al48 found that the melting peak temperature of β‐phase PVDF in PVDF/PMMA blends produced by solution casting is about 163°C, which is lower than that of neat PVDF (α phase). In fact, many factors, such as experimental instruments and conditions, raw material and error in calculating the peak temperature, can result in the difference in the melting peak temperature.…”

Section: Resultsmentioning

confidence: 99%

Role of poly(lactic acid) in the phase transition of poly(vinylidene fluoride) under uniaxial stretching

Xie

Jiang

et al. 2012

J of Applied Polymer Sci

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The effect of poly (lactic acid) (PLA) on the crystalline phase transition of poly (vinylidene fluoride) (PVDF) from a-to b-phase under uniaxial stretching for immiscible PVDF/ PLA blends was investigated. The typical sea-island structure in the blends was found to facilitate the necking of PVDF and the transition from a-to b-phase due to the local stress distribution during stretching. The crystalline phase transition of PVDF in the blends is temperature-dependent and is affected by the content of PLA. The highest content of b-phase, F(b), was achieved in the samples stretched at 60 C, while the effect of PLA content on the crystalline phase transition of PVDF is more complex. F(b) increases slightly when the sample with a PLA content no more than 15 wt % is stretched at 60, 80, and 100 C, and decreases sharply for the sample containing 20 wt % PLA; in addition, the sample containing 10 wt % PLA exhibits the highest F(b) no matter what the stretching temperature is. The mechanism of the crystalline phase transition of PVDF during the stretching is interpreted from energy barrier of the transition from a-to b-phase and the morphological structures in the blends.

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Section: Resultsmentioning

confidence: 99%

Role of poly(lactic acid) in the phase transition of poly(vinylidene fluoride) under uniaxial stretching

Xie

Jiang

et al. 2012

J of Applied Polymer Sci

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“…The band at 1736 cm −1 due to carbonyl group (C0O) stretching [15] indicates the existence of PMMA in the control sample and composites. On the other hand, the strong bands at 976, 854, 762, 613, and 532 cm −1 [29,30] are characteristic of the α phase of PVDF, while the weak bands at 841 and 510 cm −1 indicate the existence of minute quantities of the β phase. As a result, we can conclude that the addition of TiO 2 or SiO 2 does not change the crystalline phase composition of the PVDF.…”

Section: Crystallization Behavior Of Pvdf In In Situ Compositesmentioning

confidence: 98%

“…based on [29,31,32]. Here, X α and X β are the degrees of crystallinity of the α and β phases, and A α and A β are the absorbancies at 762 and 841 cm −1 , related to the α and β phases of PVDF, respectively.…”

Section: Crystallization Behavior Of Pvdf In In Situ Compositesmentioning

confidence: 99%

Hydrophilicity and crystallization behavior of PVDF/PMMA/TiO2(SiO2) composites prepared by in situ polymerization

et al. 2012

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Composites with enhanced hydrophilicity were prepared by adding TiO 2 or SiO 2 nanoparticles during the in situ polymerization of methyl methacrylate (MMA) in poly(vinylidene fluoride) (PVDF). The hydrophilicities of the PVDF/PMMA/TiO 2 (SiO 2 ) composites generated in this manner were characterized by contact angle measurements and atomic force microscopy (AFM). The hydrophilicity was dependent on nanoparticle content; it gradually increased with increasing TiO 2 (or SiO 2 ) content when the TiO 2 (or SiO 2 ) content was no more than 4 wt% of PVDF. A homogeneous dispersion of the TiO 2 (or SiO 2 ) nanoparticles in the composite matrix was observed in scanning electron microscope (SEM) images. Based on Fourier transform infrared (FTIR) spectra and wide angle X-ray diffraction (WAXD) analyses, the crystalline phase composition of PVDF was not influenced by the addition of TiO 2 (or SiO 2 ); PVDF crystallized predominantly in the α phase after in situ polymerization. Nevertheless, the nanoparticles can promote the formation of the β phase of PVDF in composites; the β-phase content increased with increasing TiO 2 content, while it was almost independent of SiO 2 content.

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“…This phenomenon might be caused by the cooperation of rapid crystallization and the special solvent environment [116] (Fig. 10).…”

Section: Blending With Polymersmentioning

confidence: 99%

Crystalline polymorphism in poly(vinylidenefluoride) membranes

Cui

Hassankiadeh

Zhuang

et al. 2015

Progress in Polymer Science

355

250

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Crystallization of PVDF in the PVDF/PMMA blends precipitated from their non-solvents: Special “orientation” behavior, morphology, and thermal properties

Cited by 53 publications

References 32 publications

Role of poly(lactic acid) in the phase transition of poly(vinylidene fluoride) under uniaxial stretching

Role of poly(lactic acid) in the phase transition of poly(vinylidene fluoride) under uniaxial stretching

Hydrophilicity and crystallization behavior of PVDF/PMMA/TiO2(SiO2) composites prepared by in situ polymerization

Crystalline polymorphism in poly(vinylidenefluoride) membranes

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