01860nas a2200205   4500008004100000022001400041245005700055210005600112260010000168300001200268490000600280520114000286653002801426653002901454653001901483653001901502100002001521700002401541856008901565       2008                        eng d  a1788-618X00aDielectric relaxations in PVDF/BaTiO3 nanocomposites0 aDielectric relaxations in PVDFBaTiO3 nanocomposites  aDEPT POLYMER ENG, MUEGYETEM RKP 3, BUDAPEST, H-1111, HUNGARYbBUDAPEST UNIV TECHNOL & ECONcAPR  a294-3010 v23 a<p>The present work aims at the study of molecular relaxations in PVDF/BaTiO3 nanocomposites using broadband dielectric spectroscopy. The nanocomposites of PVDF with BaTiO3 ( 10-30% by wt%) are prepared using simple melt mixing method. In dielectric permittivity study, two relaxation processes are identified corresponding to the crystalline, glass transition in the PVDF/BaTiO3 nanocomposites. The peaks shift to higher frequencies as the temperature is increased. Electric modulus formalism is used to analyze the dielectric relaxations to overcome the conductivity effects at low frequencies. In M `' spectra two peaks are observed only at high temperature and low frequency whereas a single relaxation peak appears at low temperatures. The single relaxation peak appearing at low temperatures is the alpha(c) relaxation attributed to crystalline chain relaxation in PVDF and the second relaxation peak which appears only at high temperatures and at a frequency lower than alpha(c) relaxation is identified as MWS relaxation. The temperature dependence of alpha(c) relaxation and MWS relaxation follows Arrhenius type behavior.</p>10adielectric spectroscopy10aInterfacial polarization10aMWS relaxation10aNanocomposites1 aChanmal, Chetan1 aJog, Jyoti, Prakash  uhttp://library.ncl.res.in/content/dielectric-relaxations-pvdfbatio3-nanocomposites-002484nas a2200229   4500008004100000022001400041245014500055210006900200260008500269300001200354490000700366520159100373653002101964653001801985653001102003653001902014653001302033100003402046700002402080700002002104856013002124       2011                        eng d  a0032-389600aDevelopment of non-woven nanofibers of egg albumen-poly (vinyl alcohol) blends: influence of solution properties on morphology of nanofibers0 aDevelopment of nonwoven nanofibers of egg albumenpoly vinyl alco  a75 VARICK ST, 9TH FLR, NEW YORK, NY 10013-1917 USAbNATURE PUBLISHING GROUPcJUL  a654-6610 v433 a<p>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</p>10aBiocompatibility10abiodegradable10ablends10ananotechnology10aProteins1 aRathna, Gundloori, Venkata Na1 aJog, Jyoti, Prakash1 aGaikwad, A., B.  uhttp://library.ncl.res.in/content/development-non-woven-nanofibers-egg-albumen-poly-vinyl-alcohol-blends-influence-solution-0