Thermomechanical Behavior of Vinyl Ester Oligomer-Toughened Epoxy-Clay Hybrid Nanocomposites

Chozhan, C. Karikal; Rajasekaran, R.; Alagar, Muthukaruppan; Gnanasundaram, P.

doi:10.1080/00914030701555734

Cited by 28 publications

(10 citation statements)

References 32 publications

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“…Recently, nanoparticles have been attracting increasing attention in the composite community because they are capable of improving the mechanical and physical properties of a polymer matrix [1][2][3][4][5][6]. Their nanometer size, which leads to high specific surface areas of up to more than 1000 m 2 =g, and has been found that rod-like aggregates of roughly spherical carbon black particles increased the material damping in the strain range in which the breakdown and reformation of carbon black aggregates occurs [31,32].…”

Section: Introductionmentioning

confidence: 98%

Damping Augmentation of Epoxy Using Carbon Nanotubes

Fereidoon

Kordani

Ahangari

et al. 2010

International Journal of Polymeric Materials

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In nanotube-based polymeric composite structures it is anticipated that high damping can be achieved by taking advantage of the interfacial friction between the nanotubes and the polymer. The purpose of this paper is to investigate the structural damping characteristics of polymeric composites containing carbon nanotubes (CNT) of various kinds and amounts. The damping characteristics of the specimens with 0, 0.5, 1 and 1.5 wt% nanotube contents were determined experimentally. Through comparing with neat resin specimens, the study showed that one can enhance damping by adding CNT fillers into epoxy. It is also shown that single-walled carbon nanotube (SWCNT)-based composites could achieve higher damping than composites with multi-walled carbon nanotube (MWCNT) fillers. Comparing the damping ratio of 0.5 wt% MWCNT and functionalized MWCNT (MWCNT-COOH) specimens, the damping ratio of the 0.5 wt% MWCNT-COOH specimen is higher because of the surface modification.Similarly, experiments showed that the maximum value of the damping ratio was obtained at 1 wt%.

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Section: Introductionmentioning

confidence: 98%

Damping Augmentation of Epoxy Using Carbon Nanotubes

Fereidoon

Kordani

Ahangari

et al. 2010

International Journal of Polymeric Materials

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“…In the case of layered silicates like montmorillonites which exhibit high cationic exchange capacity (CEC) value the compatibilization step of inorganic compound with organic matrix was done by a cationic exchange process between silicate and protonated organic agents (cetyl trimethyl ammonium bromide, triphenyl phosphite, imidazolium salts) [22][23][24][25][26][27][28][29][30] .…”

Section: Introductionmentioning

confidence: 99%

New Hybrid Materials Based on Modified Halloysite and Unsaturated Polyester Resin

Gârea

Ghebaur

Constantin

et al. 2011

Polymer-Plastics Technology and Engineering

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New hybrid materials based on unsaturated polyester resin and modified halloysite with different coupling agents were synthesized. The effect of functional groups grafted on the surface of halloysite against the properties of the final hybrids was studied using different characterization methods. The results of dynamic mechanical analyses showed that the glass transition temperature value of hybrids was strongly influenced by the halloysite modifier type. The concentration of halloysite and the modifier agent type influence the thermal stability of final hybrid materials.Keywords Halloysite; Hybrid materials; Unsaturated polyester resin; X-ray photoelectron spectroscopy INTRODUCTIONRecently the halloysite nanotubes (HNT) were used as nanofillers in polymer matrices and monomers such as linear low density polyethylene (LLDPE), polystyrene, polypropylene, epoxy resin, elastomers, natural rubber and ethylene propylene diene monomer (EPDM) .HNT represents a natural clay with a chemical structure similar with the kaolin minerals but with a distinct morphology. HNT exhibit different morphology depending on the soil from which they are extracted. The most interesting morphology of HNT is hallow nanotubular structure characterized by 20-50 nm in diameter and several hundreds nanometers in length [1] .As other layered silicates, halloysite in the natural state exhibits a high hydrophilic behavior and therefore a low compatibility with polymer matrix like epoxy resins, unsaturated polyester resins. In the case of layered silicates like montmorillonites which exhibit high cationic exchange capacity (CEC) value the compatibilization step of inorganic compound with organic matrix was done by a cationic exchange process between silicate and protonated

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“…The SEM micrographs of the nano-biocomposite systems revealed smooth and homogenous microstructures (figure 6). The presence of homogenous morphology was due to the efficient intercalation between polyester and organo-modified MMT clay [15]. This indicates that there was no phase separation between the two components which confirmed 142 G. SIVA KUMAR and R. NANTHINI the compatibility of polyester with organo-modified clay systems.…”

Section: Morphologymentioning

confidence: 63%

Synthesis and Characterization of Aliphatic-aromatic Random Copolyester/clay Nano-biocomposites

Kumar¹,

Nanthini²

2009

High Performance Polymers

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Aliphatic-aromatic biodegradable random copolyester, poly (butylene sebacate-co-butylene isophthalate) (PBSeI) was synthesized by a two step direct melt polycondensation method. This copolyester was characterized by solubility studies, viscosity measurements, infrared, 1H-NMR, 13C-NMR and thermal data. However, to be a real alternative to classical synthetic polymers and find applications, the thermal properties of biodegradable polymers have to be improved. Synthesis of nano-biocomposites, which are obtained by incorporation of nanofillers into a biomatrix, is an interesting way to create polymers with characteristic properties. In the present study, the nano-biocomposites were synthesized by dispersing different weight percentages (1, 3 and 5%) of organo-modified montmorillonite clay (OMMT) into the biodegradable polyester matrix by the solvent intercalation method. Structural characterization and thermal analysis were carried out to better understand, the relationship between the structuring of the nanofillers and the properties of nano-biocomposites. The X-ray diffraction patterns obtained for the systems confirmed the nanodispersion of the OMMT-clay in the polyester networks. The scanning electron microscopy and high resolution transmission electron microscopy analyses showed that there was no phase separation between the two components which confirmed the compatibility of polyester with the organo-modified clay system. The results show that clay incorporation improved the thermal properties of PBSeI due to the exfoliated structure of the nanocomposites formed, and thus may increase the applicability of this biodegradable polymer in different fields.

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Thermomechanical Behavior of Vinyl Ester Oligomer-Toughened Epoxy-Clay Hybrid Nanocomposites

Cited by 28 publications

References 32 publications

Damping Augmentation of Epoxy Using Carbon Nanotubes

Damping Augmentation of Epoxy Using Carbon Nanotubes

New Hybrid Materials Based on Modified Halloysite and Unsaturated Polyester Resin

Synthesis and Characterization of Aliphatic-aromatic Random Copolyester/clay Nano-biocomposites

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