Sonication-assisted synthesis of polystyrene (PS)/organoclay nanocomposites: influence of clay content

Suresh, K.; Kumar, R. Vinoth; Kumar, Manish; Jeyapriya, M.; Anbarasan, R.; Pugazhenthi, G.

doi:10.1007/s13204-017-0562-2

Cited by 10 publications

(4 citation statements)

References 21 publications

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“…It is clear that the experimental curve of PS corresponds most closely to the Z(F1)/Z(0.5) curve. A similar result was observed for PS in other works 85 . It is believed that the thermal degradation of plastics, that is, PS, follows a single‐order reaction 86 .…”

Section: Resultssupporting

confidence: 87%

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Polystyrene/polyolefin elastomer/halloysite nanotubes blend nanocomposites: Morphology‐thermal degradation kinetics relationship

Tayouri

Mousavi

Estaji

et al. 2022

Polymers for Advanced Techs

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Polystyrene/polyolefin elastomer (PS/POE) (90/10 and 80/20 wt/wt) blends containing 1, 3, and 5 phr halloysite nanotubes (HNTs) in the presence and absence of a compatibilizer (polypropylene-graft-maleic anhydride) were prepared using the meltmixing technique. Scanning electron microscopic studies confirmed a matrix-droplet morphology. Energy dispersive spectroscopy (EDS) mapping indicated that the blends containing 5 phr HNTs possessed aggregates, while no agglomeration was observed after incorporating 5 phr compatibilizer. Thermal stability and thermal degradation kinetics were investigated using thermogravimetry analysis (TGA). The results demonstrated that the PS/POE blend (90/10) containing 5 phr HNTs and compatibilizer (90/10/5/5) has the best thermal stability. Different methods such as Friedman, Flynn-Ozawa-Wall, and Kissinger-Akahira-Sunose were applied to calculate the degradation activation energy. The 90/10/5/5 nanocomposite exhibited the highest degradation activation energy, indicating that this sample is more difficult to degrade thermally than other samples. A correlation was obtained between the activation energy and the intensity of the TGA-fourier-transform infrared spectroscopy (TGA/FTIR) peaks of the evolved products. The Criado method was used to determine the changes in the thermal degradation mechanism of the samples.

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Section: Resultssupporting

confidence: 87%

“…A similar result was observed for PS in other works. 85 It is believed that the thermal degradation of plastics, that is, PS, follows a single-order reaction. 86 The experimental curve of the 90/10 blend follows the F2 reaction mechanism.…”

Section: Determination Of Degradation Mechanism By Criado Methodsmentioning

confidence: 99%

Polystyrene/polyolefin elastomer/halloysite nanotubes blend nanocomposites: Morphology‐thermal degradation kinetics relationship

Tayouri

Mousavi

Estaji

et al. 2022

Polymers for Advanced Techs

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“…A similar trend was observed in the T max values. Enhanced thermal properties for nanocomposites of polystyrene with organomodified clays have also been observed by other researchers [ 41 , 48 ]. The origin of this increase in the degradation temperatures when MMT is added in the polymer matrix has been attributed to the ability of nanometer silicate layers to obstruct volatile gas produced by thermal decomposition.…”

Section: Resultssupporting

confidence: 76%

Effect of Na- and Organo-Modified Montmorillonite/Essential Oil Nanohybrids on the Kinetics of the In Situ Radical Polymerization of Styrene

et al. 2021

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The great concern about the use of hazardous additives in food packaging materials has shown the way to new bio-based materials, such as nanoclays incorporating bioactive essential oils (EO). One of the still unresolved issues is the proper incorporation of these materials into a polymeric matrix. The in situ polymerization seems to be a promising technique, not requiring high temperatures or toxic solvents. Therefore, in this study, the bulk radical polymerization of styrene was investigated in the presence of sodium montmorillonite (NaMMT) and organo-modified montmorillonite (orgMMT) including thyme (TO), oregano (OO), and basil (BO) essential oil. It was found that the hydroxyl groups present in the main ingredients of TO and OO may participate in side retardation reactions leading to lower polymerization rates (measured gravimetrically by the variation of monomer conversion with time) accompanied by higher polymer average molecular weight (measured via GPC). The use of BO did not seem to affect significantly the polymerization kinetics and polymer MWD. These results were verified from independent experiments using model compounds, thymol, carvacrol and estragol instead of the clays. Partially intercalated structures were revealed from XRD scans. The glass transition temperature (from DSC) and the thermal stability (from TGA) of the nanocomposites formed were slightly increased from 95 to 98 °C and from 435 to 445 °C, respectively. Finally, better dispersion was observed when orgMMT was added instead of NaMMT.

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“…Among the nanomaterials, clay plays a vital role in various science and engineering fields (Suresh et al 2017) because of its availability in excess, low cost and its excellent catalytic activity (Zhu et al 2001;Duraimurugan et al 2008). Aminoclay (AC) is a water soluble synthetic phyllosilicate clay material with free amino groups.…”

Section: Introductionmentioning

confidence: 99%

Synthesis, characterization and catalytic activity of nanosized Ni complexed aminoclay

Ranchani

Parthasarathy

Devi³

et al. 2017

Appl Nanosci

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A novel Ni complexed aminoclay (AC) catalyst was prepared by complexation method followed by reduction reaction. Various analytical techniques such as FTIR spectroscopy, UV-visible spectroscopy, DSC, TGA, SEM, HRTEM, EDX, XPS and WCA measurement are used to characterize the synthesized material. The AC-Ni catalyst system exhibited improved thermal stability and fiber-like morphology. The XPS results declared the formation of Ni nanoparticles. Thus, synthesized catalyst was tested towards the Schiff base formation reaction between various bio-medical polymers and aniline under air atmosphere at 85°C for 24 h. The catalytic activity of the catalyst was studied by varying the % weight loading of the AC-Ni system towards the Schiff base formation. The Schiff base formation was quantitatively calculated by the 1 H-NMR spectroscopy. While increasing the % weight loading of the AC-Ni catalyst, the % yield of Schiff base was also increased. The k app and Ti values were determined for the reduction of indole and a-terpineol in the presence of AC-Ni catalyst system. The experimental results were compared with the literature report.

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Sonication-assisted synthesis of polystyrene (PS)/organoclay nanocomposites: influence of clay content

Cited by 10 publications

References 21 publications

Polystyrene/polyolefin elastomer/halloysite nanotubes blend nanocomposites: Morphology‐thermal degradation kinetics relationship

Polystyrene/polyolefin elastomer/halloysite nanotubes blend nanocomposites: Morphology‐thermal degradation kinetics relationship

Effect of Na- and Organo-Modified Montmorillonite/Essential Oil Nanohybrids on the Kinetics of the In Situ Radical Polymerization of Styrene

Synthesis, characterization and catalytic activity of nanosized Ni complexed aminoclay

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