<i>In situ</i> synthesis of polystyrene nanocomposites with layered double hydroxide with an unusual anion arrangement: Morphology and thermal and mechanical properties

Botan, Rodrigo; Caio, Telma Regina Nogueira; Lona, Liliane Maria Ferrareso

doi:10.1002/app.42856

Cited by 8 publications

(2 citation statements)

References 36 publications

(124 reference statements)

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“…Most likely is because of the content of SDS was too low to be coated on LDHs surface or the spacing between layers is too large [41]. Botan et al justi ed the absence of the mineral clay peaks in the nanocomposite DRX pattern to the complete breakdown of LDHs structure when the polymer chains are intercalated into the interlayer space of the hydrotalcite-like compound [49]. In the research of Khanal et al the absence of LDHs basal re ection was ascribed to the agglomeration of its sheets when increasing the lling weight which is in agreement with our ndings in r-HDPE/5%LDH (3) composite, Fig.…”

Section: Ftir and Drx Analyses As Prepared Samples For Hdpe And Its C...mentioning

confidence: 99%

The effect of laboratory synthesized and modified layered double hydroxides on recycled and neat high density polyethylene matrix properties using stearic acid as an interface modifier

DERRADJ,

Zoukrami,

GUERBAA

et al. 2023

Preprint

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In this research, the effect of layered double hydroxides (LDHs) as nanofillers on recycled and neat high density polyethylene (HDPE) properties was investigated. The synthesis of unmodified and modified LDHs was achieved via one-pot hydrothermal co-precipitation method at a constant pH. The nanofillers were organically modified by using sodium dodecyl sulphate (SDS) as surfactant and stearic acid (SA) as an interface modifier in order to overcome the incompatibility problems with HDPE Matrix. The nanocomposites were prepared by melt blending and compression molding with 3 and 5 wt% filler loading rate. Thermal, structural, and morphological tests were conducted to analyze the performance of the LDHs and the compatibilizing agent on the dispersion, and on the properties of the studied composites. Results revealed that 3 wt% of unmodified LDHs filler reinforced all physical and mechanical properties of the obtained nanocomposites based on recycled and neat HDPE matrix. When the weight of LDHs was increased to 5 wt%, morphological observations showed that SA has prevented the aggregation of LDHs particles and improved their dispersion into the recycled HDPE matrix. The physical and mechanical properties of the composite materials were enhanced dramatically with the addition of stearic acid as interface modifier into the recycled polymeric matrix compared to SDS intercalating which improved only the izod impact strength. The formulations of r-HDPE/3%LDH and r-HDPE/5%LDH-1%SA were found to be the ideal combinations which could provide novel mechanical applications to meet industrial requirements at higher scale.

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Section: Ftir and Drx Analyses As Prepared Samples For Hdpe And Its C...mentioning

confidence: 99%

The effect of laboratory synthesized and modified layered double hydroxides on recycled and neat high density polyethylene matrix properties using stearic acid as an interface modifier

DERRADJ,

Zoukrami,

GUERBAA

et al. 2023

Preprint

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“…Nanocomposite is one of the words frequently encountered at this moment in the field of materials science. Although the chemistry of polymers intercalation was long known, the development of polymer/Layered Double Hydroxides (LDHs) nanocomposites has grown in recent years . These materials exhibit a remarkable improvement in material properties compared to pure polymers.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of polyacrylamide/layered double hydroxides hybrid composite gel via in situ polymerization and study of its rheological and thermal behavior

et al. 2017

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A hybrid nanocomposite gel of layered double hydroxides (LDHs)/acrylamide was prepared by polymerization of acrylamide in the presence of LDH via sonochemical shaking method. Acrylamide monomer is initially intercalated in the interlayer of LDH and polymerized within the layers to get the hybrid gel. The morphology and structure properties of the prepared sample were characterized by FT‐IR, XRD, FESEM, particle size, as well as its flow behavior and rheology studies. Thermal analysis was investigated by thermogravimetric analysis method. The thermal analysis was performed at four different heating rates. The successful preparation of the nanocomposite and the intercalation of polyacylamide into the interlayer space of the LDH was confirmed by FT‐IR and XRD analysis. The synthesized gel exhibited a non‐Newtonian flow motion with a pseudo‐plastic behavior. Herschel‐Bulkley model gave a good description on the rheological behavior of the hybrid gel. Four mass loss steps were observed and could be attributed to the removal of weakly absorbed water from the external surface of the hydrotalcite, the removal of interlayer water, the decomposition of interlayer anions and dehydroxylation and the destruction of the layers of LDH, respectively. The apparent activation energy of the decomposition has been calculated by using Kissinger, Flynn‐Wall‐Ozawa (FWO) and modified Coats Redfern methods. The most probable mechanism function describing the nanocomposite degradation was found to be that of Jander equation: true(3/2true)[1−|1−bold-italicα1/3]−1(1−α)2/3. The results are of great interest in the understanding the thermodynamic properties of polyacrylamide/Mg‐Al layered double hydroxide hybrid nanocomposite gel and for its further applications. POLYM. COMPOS., 39:E1606–E1617, 2018. © 2017 Society of Plastics Engineers

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Evaluation of Organically Modified Layered Double Hydroxides as Fillers for the Preparation of Polymer Nanocomposites in Miniemulsion Polymerization

Silva

Lona

Dubé

2020

Macro Reaction Engineering

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Latexes of poly(n‐butyl acrylate‐co‐methyl methacrylate) [P(BA‐co‐MMA)] filled with magnesium–aluminum layered double hydroxides (MgAl‐LDHs) are synthesized using miniemulsion polymerization. Three commercial LDHs organically modified with different types of anions are used as fillers (Perkalite F100S, Perkalite A100, and Perkalite AF50) and three different types of surfactants are tested to stabilize the miniemulsions including a cationic, an anionic, and a nonionic one. Stable LDH‐containing miniemulsions are prepared with a mixture of sodium dodecyl sulfate and Triton X‐405 and the polymerizable co‐stabilizer octadecyl acrylate. They are then polymerized to yield nanocomposite latexes. Depending on the type of LDH used, the presence of the inorganic material in the reaction medium affects the polymerization kinetics. X‐ray diffraction analysis of the resulting nanocomposite films suggests exfoliation of the inorganic material. The glass transition temperature of the nanocomposites is not affected by the LDHs and the decomposition temperature of the nanocomposites determined by thermogravimetric analysis is greater than that of the pure polymer.

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In situ synthesis of polystyrene nanocomposites with layered double hydroxide with an unusual anion arrangement: Morphology and thermal and mechanical properties

Cited by 8 publications

References 36 publications

The effect of laboratory synthesized and modified layered double hydroxides on recycled and neat high density polyethylene matrix properties using stearic acid as an interface modifier

The effect of laboratory synthesized and modified layered double hydroxides on recycled and neat high density polyethylene matrix properties using stearic acid as an interface modifier

Synthesis of polyacrylamide/layered double hydroxides hybrid composite gel via in situ polymerization and study of its rheological and thermal behavior

Evaluation of Organically Modified Layered Double Hydroxides as Fillers for the Preparation of Polymer Nanocomposites in Miniemulsion Polymerization

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