Preparation and characterization of polystyrene-MgAl layered double hydroxide nanocomposites using bulk polymerization
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Hadja Benaddi
,
Djafer Benachour
Abstract
Polymer/mineral filler nanocomposites are more and more used for diverse applications. As mineral fillers, layered double hydroxides (LDHs) present a great advantage as flame retardants from an environmental point a view (reduction of smoke and toxic gases). This article deals with the use of LDH as flame retardants as compared to montmorillonite (MMT). In situ bulk polymerization of styrene was carried out in the presence of MgAl LDH modified with dodecyl sulfate (DDS) and dodecylbenzene sulfonate (DBS) surfactants. LDH concentrations used were lower than 10 wt.%. X-ray diffraction analysis of the LDH-styrene suspensions revealed the monomer intercalation into the DDS-LDH galleries and a slight decrease in the DBS-LDH basal spacing. Transmission electron microscopy analysis showed that the polymerization occurred outside the DBS-LDH galleries, leading to exfoliation of the layers on the outer surface of LDH platelets. DDS-LDH particles were trapped in the PS polymer. The thermal stability effect was observed for all LDH nanocomposites by thermogravimetric analysis. Cone calorimetry measurements revealed that only the DBS-LDH nanofiller resulted in a reduction of the peak heat released rate (PHHR) and a decrease of smoke released. DBS-LDH/PS exhibited fire properties close to those of clay-PS nanocomposite at 7 wt.% montmorillonite. The PHRR reduction remained small and the total heat release rate constant at 7 wt.% DBS-LDH loading.
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©2016 Walter de Gruyter GmbH, Berlin/Boston
Articles in the same Issue
- Frontmatter
- Original articles
- Prolonged protein immobilization of biosensor by chemically cross-linked glutaraldehyde on mixed cellulose membrane
- Hybrid biocomposites from agricultural residues: mechanical, water absorption and tribological behaviors
- Effects of nucleation and stereocomplex formation of poly(lactic acid)
- Preparation and characterization of polystyrene-MgAl layered double hydroxide nanocomposites using bulk polymerization
- Fracture behavior and deformation mechanisms of polypropylene/ethylene-propylene-diene blends
- Effect of mechanical properties of metal powder-filled hybrid moulded products
- Ablation and thermo-mechanical tailoring of EPDM rubber using carbon fibers
- Effects of mechanical strength, working temperature and wax lubricant on tribological behavior of polystyrene
- Temperature rise in a verging annular die
- Numerical investigation of the temperature influence on the melt predistribution in a spiral mandrel die with different polyolefins
Articles in the same Issue
- Frontmatter
- Original articles
- Prolonged protein immobilization of biosensor by chemically cross-linked glutaraldehyde on mixed cellulose membrane
- Hybrid biocomposites from agricultural residues: mechanical, water absorption and tribological behaviors
- Effects of nucleation and stereocomplex formation of poly(lactic acid)
- Preparation and characterization of polystyrene-MgAl layered double hydroxide nanocomposites using bulk polymerization
- Fracture behavior and deformation mechanisms of polypropylene/ethylene-propylene-diene blends
- Effect of mechanical properties of metal powder-filled hybrid moulded products
- Ablation and thermo-mechanical tailoring of EPDM rubber using carbon fibers
- Effects of mechanical strength, working temperature and wax lubricant on tribological behavior of polystyrene
- Temperature rise in a verging annular die
- Numerical investigation of the temperature influence on the melt predistribution in a spiral mandrel die with different polyolefins
