@article { ISI:000228743500067, title = {Miscibility of chitosan-hydroxyethylcellulose blends in aqueous acetic acid solutions at 35 degrees C}, journal = {Journal of Applied Polymer Science}, volume = {96}, number = {5}, year = {2005}, month = {JUN}, pages = {1996-1998}, publisher = {JOHN WILEY \& SONS INC}, type = {Article}, address = {111 RIVER ST, HOBOKEN, NJ 07030 USA}, abstract = {

The miscibility of blends of chitosan and hydroxyethylcellulose in a 2\% acetic acid solution was studied by viscometry, densitometry, and refractometry at 35 degrees C. The data suggest that the blends were completely miscible in all proportions. Further, the membranes were fabricated from concentrated blend solutions. The solid-state compatibility of the blends was confirmed by scanning electron microscopy. (c) 2005 Wiley Periodicals, Inc.

}, keywords = {blends, miscibility, refractive index, viscosity}, issn = {0021-8995}, doi = {10.1002/app.21421}, author = {Wali, A. C. and Naidu, B. V. K. and Mallikarjuna, N. N. and Sainkar, S. R. and Halligudi, Shivaraj B. and Aminabhavi, Tejraj M.} } @article { ISI:000292377500011, title = {Development of non-woven nanofibers of egg albumen-poly (vinyl alcohol) blends: influence of solution properties on morphology of nanofibers}, journal = {Polymer Journal}, volume = {43}, number = {7}, year = {2011}, month = {JUL}, pages = {654-661}, publisher = {NATURE PUBLISHING GROUP}, address = {75 VARICK ST, 9TH FLR, NEW YORK, NY 10013-1917 USA}, abstract = {

Egg albumen (EA), a highly functional globular protein with desirable properties, is the least-explored material for biomaterial applications, although it is available in abundance. In our studies, we explored the viability of EA and various blends with biocompatible and non-toxic poly (vinyl alcohol) (PVA) to produce nanofibers for biomedical applications. EA and PVA blends were prepared in various compositions. Electrospinning was used to fabricate non-woven nanofibers. Solution properties, such as viscosity and electrical conductivity, were evaluated for various prepared solutions. Solution viscosity increased with increasing polymer concentration. Solutions with higher contents of EA recorded increased conductivity, which decreased with increasing PVA content. The influence of solution properties on the morphological appearance of as-spun products was studied using scanning electron microscopy. Instead of nanofibers, nanoparticles and microparticles of EA were produced at even higher contents. In contrast, a gradual increase in the addition of PVA content to 8\% EA solution resulted in the transformation of particles from large agglomerates to very fine fibers (approximate to 100nm in diameter) because of the influence of polymer content, viscosity and conductivity. The polymer-polymer interactions in the prepared materials have been validated by Fourier transform infrared spectroscopy, differential scanning calorimetry, X-ray diffraction and gel electrophoresis. Polymer Journal (2011) 43, 654-661; doi:10.1038/pj.2011.34; published online 18 May 2011

}, keywords = {Biocompatibility, biodegradable, blends, nanotechnology, Proteins}, issn = {0032-3896}, doi = {10.1038/pj.2011.34}, author = {Rathna, Gundloori Venkata Naga and Jog, Jyoti Prakash and Gaikwad, A. B.} } @article { ISI:000317285200007, title = {Synergistic mechanical response of Nylon 6/Trogamid (R) T blends}, journal = {Journal of Applied Polymer Science}, volume = {129}, number = {1}, year = {2013}, month = {JUL}, pages = {65-72}, publisher = {WILEY-BLACKWELL}, address = {111 RIVER ST, HOBOKEN 07030-5774, NJ USA}, abstract = {

Blends of semicrystalline Nylon 6 with a varying ratios of amorphous Nylon are studied for their morphological, thermal, dielectric, and mechanical behavior. Thermal analysis indicated a compositional dependant decrease in the melting and crystallization temperatures of Nylon 6. The blends exhibited a single compositional dependant glass transition temperature in dynamic mechanical thermal analysis and dielectrical relaxation spectroscopy over entire mixing ratio indicating miscibility between the blend components. The values of flexural modulus and tensile modulus of the blends are found to increase without significant loss in the impact properties. The water absorption of the blends is also lower than the values calculated by rule of mixtures. The observed synergistic behavior of the mechanical properties of the blends is indicative of presence of strong interactions in the blends components. (c) 2012 Wiley Periodicals, Inc. J. Appl. Polym. Sci., 2013

}, keywords = {blends, dielectric properties, mechanical properties, polyamides, Thermal properties}, issn = {0021-8995}, doi = {10.1002/app.38693}, author = {Ridhore, Amol and Jog, Jyoti Prakash} } @article {47020, title = {Rheological quantification of the extent of dissolution of ultrahigh molecular weight polyethylene in melt-compounded blends with high density polyethylene}, journal = {Journal of Rheology}, volume = {64}, year = {2020}, month = {JAN}, pages = {1-12}, type = {Article}, abstract = {

Melt compounding of ultrahigh molecular weight polyethylene (UHMWPE) with high density polyethylene (HDPE) promises to be an alternative route to prepare bimodal polyethylene grades. However, complete dissolution of UHMWPE in HDPE cannot be guaranteed during melt compounding. Indeed, in an earlier work [K. Chaudhuri et al., Polym. Eng. Sci. 59, 821-829 (2019)], it was shown that a fully entangled UHMWPE did not mix well with commercial HDPE. However, a disentangled UHMWPE (dPE) could be melt-mixed in the same HDPE as evidenced qualitatively by rheological measurements. The present work is focused on quantifying the extent of dissolution of dPE in HDPE. The proposed method involves fitting rheological models for linear viscoelasticity of entangled bimodal blends of polydisperse polymers to dynamic oscillatory shear data and extracting information on the extent of dissolved species. The time-dependent diffusion model of des Cloizeaux is used along with the theory of double reptation (DR) to describe the dynamics of polydisperse homopolymers and also to extract the molecular weight distribution of the UHMWPE sample. A quadratic mixing rule, consistent with the DR model, is used to describe the dynamics of bimodal blends. Melt-mixed dPE/HDPE blends were prepared and characterized for their linear viscoelastic response by frequency sweep tests. The blends showed complex behavior with multiple crossover points, especially for the higher content of dPE. The bimodal model was then fit to the experimental frequency sweep data to determine the only unknown parameter, namely, the extent of dissolved dPE. It was found that a considerable fraction of dPE is dissolved in HDPE during melt compounding.

}, keywords = {blends, Disentangled UHMWPE, double reptation, HDPE, Mathematical modeling}, issn = {0148-6055}, doi = {10.1122/1.5113705}, author = {Chaudhuri, Krishnaroop and Lele, Ashish K.} }