Carbon nanotubes accelerated poly(vinylidene fluoride) crystallization from miscible poly(vinylidene fluoride)/poly(methyl methacrylate) blend and the resultant crystalline morphologies

Feng, Chen-xia; Duan, Jin; Yang, Jing‐hui; Huang, Ting; Zhang, Nan; Wang, Yong; Zheng, Xiaotong; Zhou, Zuowan

doi:10.1016/j.eurpolymj.2015.04.031

Cited by 26 publications

(10 citation statements)

References 54 publications

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“…One can observe that PMMA locates at the interface between the dispersed PLA phase and the PVDF matrix, exhibiting a shell − core structure. It is well known that PMMA is mutually miscible with PVDF and PLA; the location of PMMA at the interface may enhance the interfacial adhesion via the entanglement of miscible components. For a comparison, the morphology of binary blends PVDF/PMMA and PLA/PMMA are shown in Fig.…”

Section: Resultsmentioning

confidence: 92%

Toughening effect of poly(methyl methacrylate) on an immiscible poly(vinylidene fluoride)/polylactide blend

Yang

Feng

Chen

et al. 2016

Polymer International

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In this work, a mutually miscible third polymer, poly(methyl methacrylate) (PMMA), was incorporated into an immiscible poly(vinylidene fluoride)/polylactide (PVDF/PLA) blend (weight ratio 70:30). It was found that incorporation of PMMA in an appropriate amount (30-60 wt%) induced a marked improvement in fracture toughness. A five times enlargement of the elongation at break can be achieved by introducing 30 wt% PMMA. In order to understand the underlying toughening mechanism, SEM, dynamic mechanical analysis (DMA), XRD and DSC were applied to study the variations in morphology, the interaction between the three components and the crystallization behavior. SEM micrographs showed that the PMMA preferred to locate at the interface of PVDF and PLA, which was attributed to the mutual miscibility of PVDF with PMMA and PLA. Furthermore, a variety of thermal characteristics such as T g and T m induced by the entanglement of PVDF, PMMA and PLA at the interface were illustrated in DMA and DSC curves. Obviously, the interface consisting of the entanglement of PVDF, PLA and PMMA acted as a linkage to improve interfacial adhesion, which was regarded as the main toughening mechanism. This work provides a potential strategy to realize the interfacial enhancement of an immiscible blend via the incorporation of a mutually miscible third polymer.

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Section: Resultsmentioning

confidence: 92%

Toughening effect of poly(methyl methacrylate) on an immiscible poly(vinylidene fluoride)/polylactide blend

Yang

Feng

Chen

et al. 2016

Polymer International

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“…The polymer blend method is a method that uses two or more polymers to produce materials with superior properties [22]. This method is divided into three main categories, which are: miscible, immiscible and compatible polymer blending.…”

Section: Polymer Blend Methodsmentioning

confidence: 99%

“…However, miscible polymers often have one glass transition temperature that is dependent on the composition. Polymers can be miscible in melt state and immiscible in solid state due to fast crystallization of one component compared to the other [22]. When blended polymers do not crystalize at the same rate, it results in phase separation, which will affect the final product and their envisaged properties [22].…”

Section: Polymer Blend Methodsmentioning

confidence: 99%

“…Polymers can be miscible in melt state and immiscible in solid state due to fast crystallization of one component compared to the other [22]. When blended polymers do not crystalize at the same rate, it results in phase separation, which will affect the final product and their envisaged properties [22]. However, due to the miscibility of the components, they can each reside in the interlamellar and/or interspherulitic regions of each other during crystallization, thus reducing separation rates [27].…”

Section: Polymer Blend Methodsmentioning

confidence: 99%

“…Immiscible solutions are often referred to as emulsions where one component is dispersed on top of the other as small-sized droplets depending on the quantity of each solution as shown in Figure 3 [28]. Most polymer blends are immiscible because of the weak interfacial interactions between components and different molecular weight of each component [22]. Immiscible polymer blends also have enhanced properties compared to their separate components [29].…”

Section: Polymer Blend Methodsmentioning

confidence: 99%

See 2 more Smart Citations

Cyclodextrin-Based Nanofibers and Membranes: Fabrication, Properties and Applications

Chabalala¹,

Seshabela²,

Hulle³

et al. 2018

Cyclodextrin - A Versatile Ingredient

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Cyclodextrin (CD)-based electrospun nanofibers have become critical role players in the water treatment arena due to their high porosities, small diameters, high surface area-tovolume ratio and other unique properties they exhibit. Investigations demonstrate that nanofibers containing CD molecules can be facially blended with other polymeric species and/or photocatalytic and magnetic nanoparticles to enhance their rates of adsorption, inclusion complexation and selective photodegradation. These properties make them excellent candidates for the removal of water pollutants. On the other hand, the electrospinning process has become the method of choice in the fabrication of various types of CD nanofibrous mats due to its versatility, cost-effectiveness and its potential for the mass production of uniform nanofibers. CDs and CD-derivatives have also found application in membrane technologies, particularly in mixed matrix and thin film composite membranes. CD-blended membranes display improved performances in terms of selectivity, rejection, permeation and flux with reduced fouling propensities and can be used for drinking water purification and removal of emerging micropollutants. This chapter critically reviews CD-based electrospun nanofibers looking at their production, characterization methods and various applications. The use of CDs as membrane materials and how they can be fully explored in water treatment are also investigated.

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Investigation of an Abnormal α Polymorph Formation in Miscible PVDF Nanocomposite Blend Using Kinetics of Crystallization

Abolhasani

Ashjari

Azimi

et al. 2015

Macro Chemistry & Physics

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Poly(vinylidene fl uoride) (PVDF)/acrylic rubber (ACM)/Nanoclay miscible nanocomposite blends are prepared using melt-mixing method. Fourier transform infrared spectroscopy is employed to investigate the real-time conformational changes of PVDF chain segments during crystallization of corresponding nanocomposite blends under isothermal condition. This analysis demonstrates the formation of α polymorph in nanocomposite blends, which is quite abnormal compared to polymorphism of PVDF nanocomposite. Differential scanning calorimetry technique is also conducted to study the isothermal crystallization kinetic of the mentioned system. Furthermore, Avrami equation is employed to evaluate the overall crystallization rate. It is shown that addition of nanoclay to PVDF/ACM miscible blends slightly affects Avrami parameters. According to Lauritzen-Hoffman theory, the presence of crystals is observed at regime II of crystallization. Free energy of folding of miscible nanocomposite blends is comparable with that of miscible blends, suggesting the fact that PVDF molecules interact with ACM chains within nanocomposite blends, whereas nanoclay particles are wrapped by ACM molecules. De Gennes' theory is used to explain the emergence of a different polymorph in miscible nanocomposite blends compared to that in PVDF nanocomposites.

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Carbon nanotubes accelerated poly(vinylidene fluoride) crystallization from miscible poly(vinylidene fluoride)/poly(methyl methacrylate) blend and the resultant crystalline morphologies

Cited by 26 publications

References 54 publications

Toughening effect of poly(methyl methacrylate) on an immiscible poly(vinylidene fluoride)/polylactide blend

Toughening effect of poly(methyl methacrylate) on an immiscible poly(vinylidene fluoride)/polylactide blend

Cyclodextrin-Based Nanofibers and Membranes: Fabrication, Properties and Applications

Investigation of an Abnormal α Polymorph Formation in Miscible PVDF Nanocomposite Blend Using Kinetics of Crystallization

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