Nanocomposites of irradiated polypropylene with clay are degradable?

Komatsu, Luiz Gustavo Hiroki; Oliani, Washington Luiz; Lugão, Ademar B.; Parra, D.F.

doi:10.1016/j.radphyschem.2015.06.004

Cited by 11 publications

(6 citation statements)

References 26 publications

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“…MMT layers, due to the ‘labyrinth’ effect, limit the oxygen diffusion into the polymer bulk and hinder volatile decomposition products to escape. Moreover, the motion of macrochains in the presence of MMT layers is considerably reduced [17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,32,33,34,35,36].…”

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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“…Previous studies have shown that in the case of PP irradiated at 30 kGy, and exposed to the environment, showed that the tensile strength decreases with time during the 60 days of exposure period, so that the study showed PP exposed to environmental degradation is accelerated by irradiation [12]. Another study conducted by Komatsu et.al showed that polypropylene with clay and irradiated at 12.5 kGy, when exposed to environmental aging for 12 months, showed large cracks and fissures [13]. Regarding the loss of mechanical properties in a study conducted by Oliani et.…”

Section: Introductionmentioning

confidence: 87%

Effects of environmental aging in polypropylene obtained by injection molding

Romano

Oliani

Parra

et al. 2017

AIP Conference Proceedings

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“…It is also important to mention that CFA/SO and CBA/SO suspensions have higher polar- izability (∆ε' = ε 0 '-ε ∞ ') than some clay suspension systems such as diatomite/SO [9], sepiolite/SO [71], and montmorillonite/SO [72]. This may be related to the higher content of Fe 2 O 3 , which is an excellent dielectric material [73], in CFA and CBA than in diatomite (0.48%) [9], sepiolite (0.05%) [74], and montmorillonite (3.6%) [75]. S3 and Fig.…”

Section: Dielectric Characteristics Of Cfa/so and Cba/so Suspensionsmentioning

confidence: 97%

A comparative study of coal fly and bottom ashes as sustainable electroactive vibration damping materials

Begen,

Calis-Ismetoglu,

Gumus

et al. 2023

Environmental Engineering Research

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Coal is used in most of the power and chemical plants to meet energy needs which produce various waste ashes. Reuse of these ashes as electroactive materials has great importance for sustainable development. In this study, it was detected that the main components of coal fly (CFA) and bottom ashes (CBA) were oxides of silica (SiO2), iron (Fe2O3), aluminium (Al2O3), and magnesium (MgO), besides carbon. These are well-known electrorheological (ER) active materials. The aim of this study is to reveal dielectric and electroactive vibration damping capabilities of CFA and CBA. According to the dielectric and ER flow tests carried out in insulating silicone oil (SO), the optimum concentration of particles was determined to be 35 wt.% for both ashes. Higher ER yield stress (τy = 135 Pa), higher ER efficiency (32.8), and better viscoelastic properties (τc = 128 Pa, G' = 680 kPa) under 3.0 kV mm-1 applied electric field were obtained for 35CFA/SO suspension system compared to 35CBA/SO (τy = 125 Pa, EReff = 24.0, τc = 55 Pa, G' = 260 kPa). Although it was concluded that both ashes can be upcycled to sustainable and smart vibration damping alternative materials, better performance was observed for CFA particles.

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Nanocomposites of irradiated polypropylene with clay are degradable?

Cited by 11 publications

References 26 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

Effects of environmental aging in polypropylene obtained by injection molding

A comparative study of coal fly and bottom ashes as sustainable electroactive vibration damping materials

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