Structure–property relationship of polyethylene glycol‐based PU/PAN semi‐interpenetrating polymer networks

Kumar, Harinandan; Siddaramaiah,; Somashekar, R.; Mahesh, S.; Abhishek, S.; Row, Tayur N. Guru; Kini, Geetha S.

doi:10.1002/app.22147

Cited by 11 publications

(10 citation statements)

References 49 publications

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“…Such movements trigger motions in the crystalline phase, which result in increase in crystallite area. This is in agreement with the observations made by earlier investigations for entirely different class of materials 29, 30…”

Section: Resultssupporting

confidence: 94%

Investigation on microstructural behavior of styroflex/polyaniline blends by WAXS

Siddaramaiah¹,

Souza

Soares

et al. 2011

J of Applied Polymer Sci

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Styroflex/polyaniline (STF/PAni) blends were prepared by two routes namely by in situ and thermo mechanical processing method with various PAni compositions, namely, 0, 15, 30, and 45 wt %. The influence of volume fraction of PAni in the blends and synthetic routes of the STF/PAni blends on the volume resistivity and microcrystalline parameters have been investigated. The microcrystalline parameters such as the nanocrystal size (), lattice disorder (g), interplanar distance (d hkl ), width of the crystallite size distribution, surface weighted crystal size (D s ), and crystallite area were evaluated from the wide angle X-ray scattering profiles. The different asymmetric column length distribution functions namely, exponential, reinhold, and lognormal distribution methods were employed to probe the microcrystalline behavior of the STF/PAni blends and the results are compared.

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Section: Resultssupporting

confidence: 94%

Investigation on microstructural behavior of styroflex/polyaniline blends by WAXS

Siddaramaiah¹,

Souza

Soares

et al. 2011

J of Applied Polymer Sci

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“…Wide angle X‐ray scattering (WAXS) patterns of PU/SPI composites were recorded using Philip's PW 1140 diffractometer of Bragg–Branto geometry (fine focus settings) with germanium monochromatic radiation of Cu Kα (λ = 0.1542 nm) in the 2θ range 5–60°. Microstructural parameters such as crystallite size (〈 N 〉) and lattice strain (g in %) are usually determined by employing the Fourier method . The microstructure encompasses the compositional inhomogeneity, distribution of the phase in the material, the grain size, shape and the distribution functions of the grain‐size parameters, the grain (crystal)‐orientation distribution function (texture), the grain boundaries/interfaces, and the surface of the material.…”

Section: Methodsmentioning

confidence: 99%

Polyurethane/Soya Protein Isolate Green Composites: Spectral, Microstructural, Thermal, Swelling, and Biodegradation Behaviors

et al. 2016

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A series of polyurethane (PU) green composites were synthesized with varying amounts, viz. 0, 2, 4, 8, and 12 wt% of soya protein isolate (SPI). Formation of the urethane linkage in the prepared green composites is revealed by infrared spectroscopy. The glass transition temperature (T g ) of the fabricated PU/SPI composites has been evaluated by differential scanning calorimeter. Thermal stability and degradation analysis of the PU/SPI composites have been performed using a thermogravimetric analyzer (TGA). TGA thermograms clearly revealed that the fabricated composites were thermally stable upto 181°C and show a three-step of thermal degradation. The water uptake behaviors of PU/SPI systems have been studied at different chemical environments such as distilled water, salt solution, acidic and alkaline solutions. The microcrystalline parameters such as crystallite size ( N ) and surface weighted crystal size (D s ) have been evaluated from wide-angle X-ray scattering profiles using two different asymmetric distribution functions. PU/SPI green composites were subjected to biodegradation in the presence of Aspergillus niger. The structure-property response of the PU/SPI green composites has been established on the basis of these parameters. C 2016 Wiley Periodicals, Inc. Adv Polym Technol 201 , , 21679; View this article online at wileyonlinelibrary.com.

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“…An IPN can be distinguished from polymer blend in the way that an IPN swells but does not dissolve in solvents and creep properties are suppressed to a great extent . Interpenetrating polymerization is a mode of blending of two polymers to produce a mixture in which phase separation is not as extensive as it would be otherwise . However, IPNs synthesized so far exhibit various degrees of phase separation depending mainly on the miscibility of polymers .…”

Section: Introductionmentioning

confidence: 99%

Synthesis and characterization of nanocellulose reinforced full-interpenetrating polymer network based on poly(vinyl alcohol) and polyacrylamide (both crosslinked) composite films

Mandal

Chakrabarty

2015

Polym. Compos.

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An interpenetrating polymer network (IPN) is a novel blend of two polymers at least one of which is synthesized or crosslinked in the immediate presence of the other so that there is the least possibility of any gross phase separation. Full-IPNs, prepared from poly(vinyl alcohol) and polyacrylamide, have shown superior performances over the conventional individual polymers. The ranges of applications have grown rapidly for such class of materials. Cellulose nanoparticles extracted from sugarcane bagasse in-house are used to reinforce this PVA/PAAm (80:20) full-IPN in different proportions during the synthesis of IPN. The characteristics of this new series of IPN composite materials have been evaluated by Fourier transform infrared spectroscopic analysis, mechanical, thermal (thermogravimetric analysis and differential scanning calorimetry), and scanning electron microscopy techniques. A loading of 5 wt% of nanocellulose lead to the highest tensile strength amongst the different IPN composite films. Although the non-reinforced full-IPN and the various reinforced composites with nanocelluloses are almost identical in their thermal stability, they prove to be much superior compared to the neat polymers.

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Structure–property relationship of polyethylene glycol‐based PU/PAN semi‐interpenetrating polymer networks

Cited by 11 publications

References 49 publications

Investigation on microstructural behavior of styroflex/polyaniline blends by WAXS

Investigation on microstructural behavior of styroflex/polyaniline blends by WAXS

Polyurethane/Soya Protein Isolate Green Composites: Spectral, Microstructural, Thermal, Swelling, and Biodegradation Behaviors

Synthesis and characterization of nanocellulose reinforced full-interpenetrating polymer network based on poly(vinyl alcohol) and polyacrylamide (both crosslinked) composite films

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