Fibre reinforcement of elastomers: nanocomposites based on sepiolite and poly(hydroxyethyl acrylate)

Bokobza, Liliane; Burr, Alain; Garnaud, Gilles; Perrin, MY; Pagnotta, Sophie

doi:10.1002/pi.1489

Cited by 88 publications

(47 citation statements)

References 23 publications

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“…The results also ratify previous work of polymerclay nanocomposites [38,[56][57][58][59][60] that show significant enhancement of the mechanical properties of the polymer based on the good dispersion of sepiolite in the polymer matrix at low clay contents, the strong interactions between the components, and the intrinsic properties of sepiolite nanofibres such as a high strength, modulus and specific surface area [34]. Table 4 As determined from the mechanical properties of the nanocomposite films, the additions of sepiolite improve the Young's modulus and tensile strength substantially with the exception of 10wt.% clay.…”

Section: Mechanical Propertiessupporting

confidence: 76%

Porous poly(vinyl alcohol)/sepiolite bone scaffolds: Preparation, structure and mechanical properties

Killeen

Frydrych

Chen

2012

Materials Science and Engineering: C

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Porous poly(vinyl alcohol) (PVA)/sepiolite nanocomposite scaffolds containing 0-10wt.% sepiolite were prepared by freeze-drying and thermally crosslinked with poly(arylic acid).The microstructure of the obtained scaffolds was characterised by scanning electron microscopy and micro computer tomography, which showed a ribbon and ladder like interconnected structure. The incorporation of sepiolite increased the mean pore size and porosity of the PVA scaffold as well as the degree of anisotropy due to its fibrous structure.The tensile strength, modulus and energy at break of the PVA solid material that constructed the scaffold were found to improve with additions of sepiolite by up to 104%, 331% and 22% for 6wt.% clay. Such enhancements were attributed to the strong interactions between the PVA and sepiolite, the good dispersion of sepiolite nanofibres in the matrix and the intrinsic properties of the nanofibres. However, the tensile properties of the PVA scaffold deteriorated in the presence of sepiolite because of the higher porosity, pore size and degree of anisotropy.The PVA/sepiolite nanocomposite scaffold containing 6wt.% sepiolite was characterized by an interconnected structure, a porosity of 89.5% and a mean pore size of 79μm and exhibited a tensile strength of 0.44MPa and modulus of 14.9MPa, which demonstrates potential for this type of materials to be further developed as bone scaffolds.

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Section: Mechanical Propertiessupporting

confidence: 76%

Porous poly(vinyl alcohol)/sepiolite bone scaffolds: Preparation, structure and mechanical properties

Killeen

Frydrych

Chen

2012

Materials Science and Engineering: C

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“…[7][8][9][10] Sepiolite has been used for the preparation of nanocomposites using different polymers as matrix. [11][12][13][14][15] Limited work has been reported on polyethylene/sepiolite nanocomposites.…”

Section: Introductionmentioning

confidence: 97%

Synthesis and characterization of linear low‐density polyethylene/sepiolite nanocomposites

Shafiq

Yasin

Saeed

2011

J of Applied Polymer Sci

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Linear low-density polyethylene (LLDPE)/ sepiolite nanocomposites were prepared by melt blending using unmodified and silane-modified sepiolite. Two methods were used to modify sepiolite: modification before heat mixing (ex situ) and modification during heat mixing (in situ). The X-ray diffraction results showed that the position of the main peak of sepiolite remained unchanged during modification step. Infrared spectra showed new peaks confirming the development of new bonds in modified sepiolite and nanocomposites. SEM micrographs revealed the presence of sepiolite fibers embedded in polymer matrix. Thermogravimetric analysis showed that nanocomposites exhibited higher onset degradation temperature than LLDPE. In addition, in situ modified sepiolite nanocomposites exhibited higher thermal stability than ex situ modified sepiolite nanocomposites. The ultimate tensile strength and modulus of the nanocomposites were improved; whereas elongation at break was reduced. The higher crystallization temperature of some nanocomposite formulations revealed a heterogeneous nucleation effect of sepiolite. This can be exploited for the shortening of cycle time during processing.

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“…Sepiolite is a hydrated magnesium silicate clay (Mg2H2SiO3O9.xH2O), Sepiolite has a similar structure to the layered structure of montmorillonite except that the layers lack continuous octahedral sheet [10][11]. The acicular morphology of sepiolite generally improves adhesion/compatibility with polymeric matrices and provides an excellent reinforcing effect on polymer [12] and sepiolite improved the endothermic nature of decomposition reaction. This filler increased the tendency of the matrix to charring.…”

Section: Introductionmentioning

confidence: 99%

A comparison between the effects of sepiolite and silica on mechanical properties and thermal stability of NR/EPDM blend

Winya

Hansupalak

2016

MATEC Web Conf.

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Abstract. This study focused on improving the ablation properties and mechanical properties of natural rubber (NR)/ethylene propylene diene monomer (EPDM) blends by using two different commercial fillers: sepiolite and silica. The results showed that sepiolite and silica similarly improved both properties in the loading range of interest (0-12.5 phr). However, sepiolite was superior than silica as using less loading to acheive comparable mechanical and thermal properties. The optimum loading of sepiolite was 5 phr, while that of silica was 10 phr. For both filler systems, the minimum ablation rate found was approximately 0.17 mm/s, and the tensile strength and the hardness of corresponding NR/EPDM composite were improved after modification with sepiolite or silica.Thus, the composite reinforced with sepiolite or silica is suitable for many applications, such as internal insulations of rocket motor.

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Fibre reinforcement of elastomers: nanocomposites based on sepiolite and poly(hydroxyethyl acrylate)

Cited by 88 publications

References 23 publications

Porous poly(vinyl alcohol)/sepiolite bone scaffolds: Preparation, structure and mechanical properties

Porous poly(vinyl alcohol)/sepiolite bone scaffolds: Preparation, structure and mechanical properties

Synthesis and characterization of linear low‐density polyethylene/sepiolite nanocomposites

A comparison between the effects of sepiolite and silica on mechanical properties and thermal stability of NR/EPDM blend

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