Preparation and Characterization of Organoclay Filled Polysulfone Nanocomposites

Jose, Ajith James; Alagar, M.; Thomas, Selvin P.

doi:10.1080/10426914.2011.585490

Cited by 13 publications

(6 citation statements)

References 27 publications

(20 reference statements)

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“…In 5% nanocomposite, discontinuity in the form of debonding exists because of non-adherence of nanofillers to the polymer and the stress transfer at the polymer/n-SHA particles interface becomes ineffective. [20] Tensile modulus, expressing the stiffness of the material, is a bulk property that depends primarily on the geometry, particle size distribution and concentration of the filler. The exact nature of the tensile response of a polymeric material depends upon the chemical structure of the polymer, conditions of the sample preparation, molecular weight, molecular weight distribution, and the extend of any cross linking or branching.…”

Section: Mechanical Propertiesmentioning

confidence: 99%

Fabrication of Bioactive Polyoxymethylene Nanocomposites for Bone Tissue Replacement

Jose

Alagar

2012

Macromolecular Symposia

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Stearic acid modified nano hydroxyapatite (n-SHA) filled polyoxymethylene (POM) nanocomposites were prepared by melt mixing method for bone tissue replacement and regeneration applications. Contact angle measurements of POM nanocomposites were carried out to understand the effect of n-SHA addition on the hydrophobicity of nanocomposites. The mechanical properties like tensile strength, Young's modulus and elongation at break were found to be increased significantly by the incorporation of n-SHA into the POM matrix. The bone-bonding ability of the nanocomposites was evaluated by examining the apatite formation on their surface after soaking in simulated body fluid (SBF) and apatite formation was studied by atomic force microscopy (AFM). The protein adhesion studies revealed the enhanced biocompatibility of the nanocomposites due to the presence of n-SHA nanofillers on the surface and it provides favorable binding sites for protein adsorption. The significant improvement in the biocompatibility as well as mechanical, thermal and hydrophobic properties of the POM nanocomposites makes it a potential future material for bone implantation.

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Section: Mechanical Propertiesmentioning

confidence: 99%

Fabrication of Bioactive Polyoxymethylene Nanocomposites for Bone Tissue Replacement

Jose

Alagar

2012

Macromolecular Symposia

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“…The contact angle was increased with increase in weight percentages of HPSiE. The increase in hydrophobicity is mainly attributed to the difference in both the chemical properties of DGEBA‐HPSiE composites and its surface morphology . The increase in water contact angle indicates the increase in the hydrophobic nature of the composite this is due to the chemical interaction between HPSiE and DGEBA and also presence of hydrophobic nature Si–O–Si linkage in the composites.…”

Section: Resultsmentioning

confidence: 97%

Hyperbranched polysiloxane‐based diglycidyl ether of bisphenol a epoxy composite for low k dielectric application

et al. 2013

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A new type of diglycidyl ether of bisphenol A (DGEBA) epoxy-based hybrids has been developed by the incorporation of varying percentages of glycidyl-terminated hyperbranched polysiloxane (HPSiE) into DGEBA resin and are characterized for their physicochemical, thermal, mechanical, and dielectric behaviors by modern analytical techniques. Data resulted from different studies indicate that the incorporation of HPSiE into DGEBA epoxy resin significantly improved the impact strength, thermal, and dielectric properties with an increase in the HPSiE loading. The contact angle [water and diiodomethane (DI)] increase with increases according to the weight percentages of HPSiE, which indicates the HPSiE-modified DGEBA shows hydrophobic in nature. The resulting epoxy-based hybrid composites can be used effectively for different industrial and engineering applications for better performance with improved longevity. POLYM. COM-POS., 34:904-911, 2013. ª

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“…However, opposite behavior was also reported. For example, in clay/polymer nanocomposites, clay layers were shown to restrict the relaxation of polymer chains, and as a result, polymer chains were unable to experience polarization [55].…”

Section: Relative Permittivitymentioning

confidence: 99%

Enhanced electromagnetic interference shielding effectiveness of polycarbonate/graphene nanocomposites foamed via 1-step supercritical carbon dioxide process

et al. 2016

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Abstract:The dielectric and electromagnetic interference (EMI) shielding properties of polycarbonate/graphene nanocomposites foamed using supercritical carbon dioxide were studied as a function of their cellular and composite morphology. Foamed polycarbonate filled with 0.5% (by weight) graphene exhibited enhanced EMI shielding effectiveness, which was found to depend on cellular and composite morphology in a complex manner.Foamed composites presented a maximum specific EMI shielding effectiveness of ~39 dB.cm 3 /g, which is approximately 35 times greater than that of unfoamed composite (1.1 dB.cm 3 /g). In addition, the relative permittivity was found to increase up to 3.25 times. The results suggest that graphene filled polymer foams can enhance the performance of electronic devices, opening up the possibility of using these materials in electronic applications.

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Preparation and Characterization of Organoclay Filled Polysulfone Nanocomposites

Cited by 13 publications

References 27 publications

Fabrication of Bioactive Polyoxymethylene Nanocomposites for Bone Tissue Replacement

Fabrication of Bioactive Polyoxymethylene Nanocomposites for Bone Tissue Replacement

Hyperbranched polysiloxane‐based diglycidyl ether of bisphenol a epoxy composite for low k dielectric application

Enhanced electromagnetic interference shielding effectiveness of polycarbonate/graphene nanocomposites foamed via 1-step supercritical carbon dioxide process

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