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Desai, Sandip; Emanuel, Anurag L.; Sinha, Vijay Kumar

doi:10.1023/a:1026099732272

Cited by 34 publications

(13 citation statements)

References 6 publications

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“…. The characteristic bands of the urethane group of the pristine polymer appeared at 3406–3430 cm −1 (N − H stretching) and 1728 cm −1 (−NHCOO − stretching) . The disappearance of the band at 2250–2270 cm −1 indicates that there was no free –NCO group present in the hyperbranched polymer structure.…”

Section: Resultsmentioning

confidence: 99%

Hyperbranched polyurethane/triethanolamine functionalized multi‐walled carbon nanotube nanocomposites as remote induced smart materials

Kalita

Karak

2014

Polymer International

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Triethanolamine functionalized multi-walled carbon nanotubes (TEA-f-MWCNTs)/hyperbranched polyurethane nanocomposites were prepared by the in situ polymerization technique. The functionalization of the MWCNTs was confirmed by Fourier transform infrared spectroscopy and Raman spectroscopy studies. The homogeneous distribution and the strong interfacial interaction of TEA-f-MWCNTs with the polyurethane chains were confirmed by transmission electron microscopy and Fourier transform infrared spectroscopy studies, respectively. Significant enhancements of tensile strength (6.5 − 28.5 MPa) and scratch resistance (3-7 kg) with content of TEA-f-MWCNTs (0-2 wt%) were observed. Thermogravimetric analysis showed an increase in thermal stability from 240 to 287• C by the formation of nanocomposites. X-ray diffraction and differential scanning calorimetry studies confirmed an increment in the degree of crystallinity of the nanocomposites with increase in TEA-f-MWCNT content. The extent of shape recovery as well as recovery speed were enhanced with increase in the output power of the microwave. Thus the studied nanocomposites could be utilized as non-contact microwave energy tunable shape memory materials.

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Section: Resultsmentioning

confidence: 99%

Hyperbranched polyurethane/triethanolamine functionalized multi‐walled carbon nanotube nanocomposites as remote induced smart materials

Kalita

Karak

2014

Polymer International

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“…Vegetable oils are just one of the bio-based products that can be used in the production of polymers, because of their availability at low costs and high purity [3]. They are predominantly composed of triglyceride molecules from fatty acid chains with 16 to 22 carbon atoms and with 0 to 3 double bonds per chain.…”

Section: Introductionmentioning

confidence: 99%

Moisture dependence of the properties of composites made from tung oil based polyurethane and wood flour

et al. 2012

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Natural composites prepared from a polyurethane (PU) based on tung oil and different percentages of wood flour (WF) or microcellulose (MC) were exposed to humid environments and the resulting changes of their properties were evaluated. The equilibrium moisture content of the composites increased with the wood flour percentage. Dynamic mechanical tests performed during temperature scans revealed the changes resulting from moisture absorption on the main transition temperature of the matrix as well as on the storage modulus. The tensile mechanical properties of the materials were also strongly affected by moisture. The different degree of dispersion achieved during the incorporation of WF and MC into the matrix was considered the main reason for the different effect of each filler on the thermal and mechanical properties of the resulting composites.

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“…To avoid these problems, biomaterial-based PU adhesives have attracted much attention of researchers. [2][3][4][5][6] Castor oil, a naturally occurring triglyceride of ricinoleic acid, can be employed for the synthesis of PU. 7,8 Mechanical properties of castor oil-based adhesive shows a high dependency on the NCO/OH molar ratio due to higher or lower cross-linking achieved during a reaction.…”

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confidence: 99%

Mechanical and Thermal Properties of Castor Oil–Based Polyurethane Adhesive: Effect of TiO₂ Filler

Malik

Kaur

2016

Adv Polym Technol

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Polyurethane (PU) production with the use of vegetable oils is greatly appreciated by researchers due to their low cost, easy availability, and nontoxic nature. The addition of TiO 2 in castor oil-based PU adhesive led to a remarkable enhancement in its mechanical and chemical resistance, an increase in T g value, and the adhesion. TGA analysis was done to study the thermal stability of prepared adhesive. The adhesive was also characterized by differential scanning calorimetry (DSC) and FT-IR spectroscopy. Influence of various factors such as the NCO/OH molar ratio, hydroxyl value of polyols, and the amount of filler on the properties of adhesive were studied in detail. The adhesive with a mole ratio of NCO/OH equaling to 1.2, filled with 3 wt% TiO 2 , was found to be much better than the commercial adhesive used for bonding wood, when tested for single lap shear strength in various environmental conditions. C

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Untitled

Cited by 34 publications

References 6 publications

Hyperbranched polyurethane/triethanolamine functionalized multi‐walled carbon nanotube nanocomposites as remote induced smart materials

Hyperbranched polyurethane/triethanolamine functionalized multi‐walled carbon nanotube nanocomposites as remote induced smart materials

Moisture dependence of the properties of composites made from tung oil based polyurethane and wood flour

Mechanical and Thermal Properties of Castor Oil–Based Polyurethane Adhesive: Effect of TiO₂ Filler

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Untitled

Cited by 34 publications

References 6 publications

Hyperbranched polyurethane/triethanolamine functionalized multi‐walled carbon nanotube nanocomposites as remote induced smart materials

Hyperbranched polyurethane/triethanolamine functionalized multi‐walled carbon nanotube nanocomposites as remote induced smart materials

Moisture dependence of the properties of composites made from tung oil based polyurethane and wood flour

Mechanical and Thermal Properties of Castor Oil–Based Polyurethane Adhesive: Effect of TiO2 Filler

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Mechanical and Thermal Properties of Castor Oil–Based Polyurethane Adhesive: Effect of TiO₂ Filler