Nucleation effect of montmorillonite with β-nucleating surface on polymorphous of melt-crystallized isotactic polypropylene nanocomposites

Dai, Xin; Zhang, Zishou; Wang, Chunguang; Ding, Qian; Jiang, Juan; Mai, Kancheng

doi:10.1016/j.compscitech.2013.09.016

Cited by 29 publications

(16 citation statements)

References 40 publications

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“…Meanwhile another important problem arose, which still needs to be solved, i.e., polymer/layered silicate nanocomposites recycling after their service–life. Significant research efforts are directed into the field of polyolefin/montmorillonite (MMT) nanocomposites [5,6,7,8,9,10,11,12,13,14,15]. Among them, polypropylene–based nanocomposites with MMT are promising engineering materials with good mechanical and barrier properties that can be easily fabricated on industrial scale by melt processing.…”

Section: Introductionmentioning

confidence: 99%

Examining the Influence of Re–Used Nanofiller—Pyrolyzed Montmorillonite, on the Thermal Properties of Polypropylene–Based Engineering Nanocomposites

et al. 2019

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Pyrolysis of the polypropylene/montmorillonite (PP/OMMT) nanocomposites allows for recovery of the filler that can be then re–used to produce PP/pyrolyzed MMT (PMMT) nanostructured composites. In this work, we discuss the thermal properties of PP/PMMT composites investigated by thermogravimetric analysis (TGA), differential scanning calorimetry (DSC), and dynamic mechanical analysis (DMA). It has been found that effect of PMMT (5 wt. % and 10 wt. %) on matrix thermal stability occurs at temperatures above 300 °C. Addition of 5 wt. % and 10 wt. % of PMMT into polypropylene system gave good stabilization effect, as confirmed by the overall stabilization effect (OSE) values, which increased by 4% and 7%, respectively, compared to the control sample (PP). Interestingly, the presence of 1 wt. % and 3 wt. % of pyrolyzed clay stabilizes the system better than the same concentrations of organoclay added into polypropylene melt. DSC data revealed that pyrolyzed clay has still the same tendency as organoclay to enhance formation of the α and β crystalline PP phases only. The pyrolyzed MMT causes an improvement of the modulus in the glassy as well as rubbery regions, as confirmed by DMA results.

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Section: Introductionmentioning

confidence: 99%

Examining the Influence of Re–Used Nanofiller—Pyrolyzed Montmorillonite, on the Thermal Properties of Polypropylene–Based Engineering Nanocomposites

et al. 2019

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“…Recently, the rigid inorganic particles, such as nano‐CaCO 3 , wollastonite and zeolite with heterogeneous β‐nucleating surface have been reported by supporting calcium pimelate as β‐nucleating agent on the surface of inorganic particle surface, resulting in the transition of α → β‐nucleation mechanism of inorganic particle surface. The iPP composites with high β‐crystal contents can easily be obtained by using these inorganic particles with β‐nucleating surface as filler .…”

Section: Introductionmentioning

confidence: 99%

“…Our previous work indicated that the heterogeneous nucleation of MMT surface can be changed from α‐nucleation into β‐nucleation through the MMT supported by chemically calcium pimelate due to the chemical reaction between pimelic acid (PA) and calcium ions on the surface of MMT. A novel MMT with β‐nucleating surface (β‐MMT) was obtained.…”

Section: Introductionmentioning

confidence: 99%

“…Generally, the increased β‐crystal content is favorable to improve the impact strength of β‐nucleated iPP and its composites. To avoid the influence of strong α‐nucleation of MMT, a novel MMT with β‐nucleating surface (β‐MMT) has been prepared in our previous work . To understand the influence of β‐crystallization on the mechanical properties of iPP/MMT nanocomposites, MMT‐filled α‐iPP and β‐iPP nanocomposites were prepared by using MMT with α‐ and β‐nucleating surface as fillers, respectively.…”

Section: Introductionmentioning

confidence: 99%

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Mechanical properties improvement of montmorillonite‐filled isotactic polypropylene nanocomposites by β‐modification

et al. 2016

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To investigate the effect of b-crystallization on mechanical properties of isotactic polypropylene (iPP) nanocomposites, montmorillonite (MMT)-filled a-iPP and b-iPP nanocomposites were prepared by MMT with a-and b-nucleating surface, respectively. The polymorphic composition, mechanical properties and fracture morphologies of a-MMT and b-MMT filled iPP nanocomposites were compared and the exfoliation of MMT in the iPP matrix were investigated. It is found that the tensile modulus, yield strength, and flexural properties of b-MMT filled iPP nanocomposites are higher than those of b-iPP and the impact strength of b-MMT filled iPP nanocomposites is higher than those of both b-iPP and a-iPP nanocomposites. The impact strength increases with increasing of the b-crystal content. However, the b-crystal content has little influence on the tensile and flexural properties of b-MMT filled iPP nanocomposites. Compared with a-MMT, the exfoliation of b-MMT in iPP as well as interfacial adhesion between MMT and iPP are improved. POLYM. COMPOS., 00:000-000, 2016.

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“…The physical properties of β‐form polypropylene present some differentiations from the α‐form, which include improved elongation, impact strength, and heat distortion . Therefore, β‐polypropylene has attracted much interest from both industry and academia, leading to numerous publications and commercial products . Furthermore, the simultaneous existence of α‐ and β‐crystals can give materials with much more improved mechanical properties.…”

Section: Introductionmentioning

confidence: 99%

Effect of Silica Nanoparticles Modification on the Thermal, Structural, and Decomposition Properties of a β‐Nucleated Poly(propylene‐co‐ethylene) Matrix

Vourlias

Bikiaris

Chrissafis

2014

Macro Chemistry & Physics

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In the current investigation, nanocomposites containing a β‐nucleated poly(propylene‐co‐ethylene) (PPR) matrix filled with untreated (SiO2) and methacrylate‐modified silica nanoparticles (SiO2‐MAA) are prepared. Transmission electron microscopy (TEM) reveals the improvement in the quality of dispersion due to the surface modification of the nanoparticles. Also, from differential scanning calorimetry (DSC) and X‐ray diffraction (XRD), it is found that the β‐nucleating agent and silica nanoparticles work synergistically in order to increase the relative β‐content in the nanocomposite samples. The thermal stability of each samples is evaluated by means of thermogravimetric analysis (TGA) and the enhancement of the thermal stability of the nanocomposites is attributed to the nanoconfinement of the macromolecular chains caused by the presence of the fillers.

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Nucleation effect of montmorillonite with β-nucleating surface on polymorphous of melt-crystallized isotactic polypropylene nanocomposites

Cited by 29 publications

References 40 publications

Examining the Influence of Re–Used Nanofiller—Pyrolyzed Montmorillonite, on the Thermal Properties of Polypropylene–Based Engineering Nanocomposites

Examining the Influence of Re–Used Nanofiller—Pyrolyzed Montmorillonite, on the Thermal Properties of Polypropylene–Based Engineering Nanocomposites

Mechanical properties improvement of montmorillonite‐filled isotactic polypropylene nanocomposites by β‐modification

Effect of Silica Nanoparticles Modification on the Thermal, Structural, and Decomposition Properties of a β‐Nucleated Poly(propylene‐co‐ethylene) Matrix

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