Morphology and properties of thermoplastic polyurethane nanocomposites incorporating hydrophilic layered silicates

Finnigan, Bradley; Martin, Darren J.; Halley, P. J.; Truss, R. W.; Campbell, Kayleen

doi:10.1016/j.polymer.2004.01.049

Cited by 245 publications

(150 citation statements)

References 45 publications

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“…There was, however, a significant improvement in the Young's modulus values with increasing levels of both Na-MMT and O-MMT. The same trend was observed for TPU/layered silicate clay nanocomposites by Finnigan et al 32 Interestingly, O-MMT caused a larger reduction in the tensile and elongation properties than Na-MMT. Meanwhile, the enhancement of Young's modulus caused by O-MMT was higher than that caused by Na-MMT.…”

Section: Mechanical Propertiessupporting

confidence: 83%

Synthesis and characterization of in situ polymerized segmented thermoplastic elastomeric polyurethane/layered silicate clay nanocomposites

Choi

Anandhan

Youk

et al. 2006

J of Applied Polymer Sci

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Nanocomposites based on thermoplastic elastomeric polyurethane (TPU) and layered silicate clay were prepared by in situ synthesis. The properties of nanocomposites of TPU with unmodified clay were compared with that of organically modified clay. The nanocomposites of the TPU and organomodified clay showed better dispersion and exhibited superior properties. Exfoliation of the clay layers was observed at low organoclay contents, whereas an intercalated morphology was observed at higher clay contents. As one of major purposes of this study, the effect of the silicate layers in the nanocomposites on the order-disorder transition temperature (T ODT ) of the TPU was evaluated from the intensity change of the hydrogen-bonded and free carbonyl stretching peaks and from the peak position change of the NÀ ÀH bending peak. The presence of the organoclay increased T ODT by approximately 108C, which indicated improved stability in the phase-separated domain structure. The layered silicate clay caused a tremendous improvement in the stiffness of the TPU; meanwhile, a reduction in the ultimate elongation was observed.

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Section: Mechanical Propertiessupporting

confidence: 83%

Synthesis and characterization of in situ polymerized segmented thermoplastic elastomeric polyurethane/layered silicate clay nanocomposites

Choi

Anandhan

Youk

et al. 2006

J of Applied Polymer Sci

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“…Numerous studies have revealed that the addition of a very low percentage of layered silicates can lead to a significant enhancement in many more properties, such as stiffness and strength, [1][2][3] flame retardancy, 4,5 gas barrier properties, 6 ionic conductivity, 7 electrical properties, 8 thermal stability, 9 and biodegradability. 10 Lightweight and economic competitiveness using a minimal amount of reinforcing materials are other advantages of polymer clay nanocomposites.…”

Section: Introductionmentioning

confidence: 99%

“…MMT is mostly favored among the smectite class of 2 : 1 layered silicate clays for polymer nanocomposites preparation because of its high cation exchange capacity (CEC), aspect ratio, surface area, surface reactivity, and adsorptive property. The Na þ cation in MMT [(Na,Ca) 0.33 (Al,Mg) 2 (Si 4 O 10 )(OH) 2 ÁnH 2 O] is substituted by ammonium or phosphonium quaternary salts as hydrophobic surfactants before processing, in order to enhance better layer separation and improve compatibility with polymer matrix. Enhancement of significant properties of nanocomposites is a measure of dispersion or exfoliation of the individual silicate platelets within the polymer matrix.…”

Section: Introductionmentioning

confidence: 99%

Preparation and characterization of thermoplastic polyurethane/organoclay nanocomposites by melt intercalation technique: Effect of nanoclay on morphology, mechanical, thermal, and rheological properties

Barick

Tripathy

2010

J of Applied Polymer Sci

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Nanocomposites based on thermoplastic polyurethane (TPU) and organically modified montmorillonite (OMMT) were prepared by melt blending. Organically modified nanoclay was added to the TPU matrix in order to study the influence of the organoclay on nanophase morphology and materials properties. The interaction between TPU matrix and nanofiller was studied by infrared spectroscopy. Morphological characterization of the nanocomposites was carried out using X-ray diffraction, transmission electron microscopy, and scanning electron microscopy techniques. The results showed that melt mixing is an effective process for dispersing OMMT throughout the TPU matrix. Nanocomposites exhibit higher mechanical and thermal properties than pristine TPU. All these properties showed an increasing trend with the increase in OMMT content. Thermogravimetric analysis revealed that incorporation of organoclay enhances the thermal stability of nanocomposites significantly. Differential scanning calorimetry was used to measure the melting point and the glass transition temperature (T g ) of soft segments, which was found to shift toward higher temperature with the inclusion of organoclays. From dynamic mechanical thermal analysis, it is seen that addition of OMMT strongly influenced the storage and loss modulus of the TPU matrix. Dynamic viscoelastic properties of the nanocomposites were explored using rubber process analyzer. V C 2010 Wiley Periodicals, Inc. J Appl Polym

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“…Nanocomposites incorporating nanoclays as filler have been produced mostly for industrial, automotive and packaging purposes [4]. However, less attention has been paid for biomedical applications.…”

Section: Introductionmentioning

confidence: 99%

Thermal properties of ethyl vinyl acetate (EVA)/montmorillonite (MMT) nanocomposites for biomedical applications

et al. 2016

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Abstract. The viability of nanocomposites comprising Ethyl Vinyl Acetate (EVA) filled montmorillonite (MMT) nanoclay as candidate materials of biomedical devices was investigated. EVA/MMT nanocomposites were prepared by incorporating the ratios 0, 1, 3 and 5% of organoclay MMT to EVA copolymer. In vitro biostability of the neat EVA and EVA nanocomposites was compared and assessed by exposing the materials to oxidizing and hydrolytic agents for 4 weeks at 37°C. The thermal properties of the neat EVA and EVA nanocomposites nanoclay filled were studied by using thermogravimetric analysis (TGA). TGA results indicate that the EVA nanocomposite sample containing 1 wt% MMT exhibits higher T onset and significant reduction in the rate of mass loss as compared to the neat EVA and other nanocomposites.

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Morphology and properties of thermoplastic polyurethane nanocomposites incorporating hydrophilic layered silicates

Cited by 245 publications

References 45 publications

Synthesis and characterization of in situ polymerized segmented thermoplastic elastomeric polyurethane/layered silicate clay nanocomposites

Synthesis and characterization of in situ polymerized segmented thermoplastic elastomeric polyurethane/layered silicate clay nanocomposites

Preparation and characterization of thermoplastic polyurethane/organoclay nanocomposites by melt intercalation technique: Effect of nanoclay on morphology, mechanical, thermal, and rheological properties

Thermal properties of ethyl vinyl acetate (EVA)/montmorillonite (MMT) nanocomposites for biomedical applications

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