02156nas a2200193   4500008004100000022001400041245009300055210006900148260009900217300001400316490000700330520139800337653001001735653002501745653001901770100002501789700002401814856012401838       2006                        eng d  a0032-386100aCrystallization and phase transformation kinetics of poly(1-butene)/MWCNT nanocomposites0 aCrystallization and phase transformation kinetics of poly1butene  aTHE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, OXON, ENGLANDbELSEVIER SCI LTDcAUG  a6414-64210 v473 a<p>Poly(1-butene)/MWCNT nanocomposites were prepared by simple melt processing technique. Crystallization, crystal-to-crystal phase transformation and spherulitic morphology were studied using differential scanning calorimetry (DSC), wide angle X-ray diffraction (WAXD) and optical microscopy (OM). The non-isothermal crystallization exhibited higher values of Z, derived from Avrami theory and lower values of F(T) obtained from Avrami-Ozawa analysis, while the isothermal crystallization revealed a significant increase in crystallization temperatures and lower crystallization half times compared to pristine PB. The observed changes in the crystallization kinetics were ascribed to the enhanced nucleation of PB in the presence of MWCNT. The nucleating activity calculated from the non-isothermal crystallization data revealed that the MWCNTs provide an active surface for the nucleation of PB. The optical micrographs exhibited significantly smaller crystallites with disordered morphology for the nanocomposites compared to the well defined spherulitic morphology for pristine PB. The rate of phase transformation from kinetically favored tetragonal to thermodynamically stable hexagonal form was noticeably enhanced as evidenced by the reduction in the half time for phase transformation from 58 h to 25 h for PB reinforced with 7% MWCNT. (c) 2006 Elsevier Ltd. All rights reserved.</p>10aMWCNT10aPhase transformation10apoly(1-butene)1 aWanjale, Santosh, D.1 aJog, Jyoti, Prakash  uhttps://library.ncl.res.in/content/crystallization-and-phase-transformation-kinetics-poly1-butenemwcnt-nanocomposites-001688nas a2200205   4500008004100000022001400041245010200055210006900157260008600226300001400312490000700326520092100333653001501254653001001269653001901279653001701298100002501315700002401340856011801364       2006                        eng d  a0022-234800aViscoelastic and dielectric behavior of poly(1-butene)/multiwalled carbon nanotube nanocomposites0 aViscoelastic and dielectric behavior of poly1butenemultiwalled c  a325 CHESTNUT ST, SUITE 800, PHILADELPHIA, PA 19106 USAbTAYLOR & FRANCIS INCcNOV  a1053-10640 v453 a<p>Linear viscoelastic properties and dielectric behavior of poly(1-butene)/multiwalled carbon nanotube (MWCNT) nanocomposites were investigated. Dynamic mechanical analysis showed significant increase in storage modulus in the rubbery regime. The tan delta peak temperature remained constant; however, the peak intensity was lowered for the nanocomposites. In melt rheological studies the nanocomposites showed a shift in crossover frequency to the lower side, suggesting delayed relaxation of the molecular chains in the presence of MWCNT and this shift was found to depend on the content of MWCNT. The dielectric constant increased from 2.2 to 70 for the nanocomposite with 7 wt. % MWCNT. The electrical conductivity increased significantly, from 10(-15) to 10(-3) S/cm. The results of rheology and dielectric studies indicate that a percolation network is formed that is responsible for the observed changes.</p>10aDielectric10aMWCNT10apoly(1-butene)10aviscoelastic1 aWanjale, Santosh, D.1 aJog, Jyoti, Prakash  uhttps://library.ncl.res.in/content/viscoelastic-and-dielectric-behavior-poly1-butenemultiwalled-carbon-nanotube-002270nas a2200241   4500008004100000022001400041245010000055210006900155260007300224300001200297490000800309520138900317653001901706653001901725653001701744653001601761653002701777100002201804700002501826700002201851700002401873856013101897       2007                        eng d  a0376-738800aAssessing feasibility of polyarylate-clay nanocomposites towards improvement of gas selectivity0 aAssessing feasibility of polyarylateclay nanocomposites towards   aPO BOX 211, 1000 AE AMSTERDAM, NETHERLANDSbELSEVIER SCIENCE BVcDEC  a277-2860 v3063 a<p>Polymer-clay nanocomposites are well known to reduce the penetrant permeability by following tortuous path. Effects of such reduction in gas permeability on variation in selectivity of nanocomposites prepared using a high permeability polymer were examined. The polyarylate: poly (tetramethyl bisphenolA-iso/terephthalate) that exhibits high permeability and moderate selectivity was chosen for making nanocomposites with two organically modified clays (Cloisite 6A and 10A) by solution intercalation method. The nanocomposite formation for various clay loadings (3, 5 and 7% w/w) in polyarylate was ascertained by change in physical properties (X-ray diffraction, DMA, TEM). Behavior of solution viscosity and nanocomposite density indicated existence of polymer-clay layer interactions. As anticipated, though the gas permeability of pure gases, viz., He, N-2, CH4 and CO2 exhibited decrease, it was not monotonous. This decrease was more for larger gases (N-2, CH4 and CO2) in comparison to the decrease for smaller gas (He) permeability. This led to a decrease in CO2/N-2 and CO2/CH4 selectivities and increase in He/CO2 selectivity; while He/CH4 selectivity was increased substantially at 7% clay loading. This variation indicated feasibility of nanocomposites formation as a tool for improving selectivity of certain gas pairs. (c) 2007 Elsevier B.V. All rights reserved.</p>10aGas permeation10aNanocomposites10apolyarylates10aselectivity10asolution intercalation1 aBhole, Yogesh, S.1 aWanjale, Santosh, D.1 aKharul, Ulhas, K.1 aJog, Jyoti, Prakash  uhttps://library.ncl.res.in/content/assessing-feasibility-polyarylate-clay-nanocomposites-towards-improvement-gas-selectivity-001494nas a2200157   4500008004100000022001400041245004900055210004300104260008900147300000800236520093600244100002401180700002501204700002401229856008301253       2008                        eng d  a1618-722900aPoly(4-methyl-1-pentene)/MWNT nanocomposites0 aPoly4methyl1penteneMWNT nanocomposites  a1, QUAI LEZAY-MARNESIA, F067000 STRASBOURG, FRANCEbEUROPEAN POLYMER FEDERATIONcJUL  a0793 a<p>Nanocomposites of poly(4-methyl-1-pentene) (PMP) with various weight fractions of multiwall carbon nanotubes (MWNT's) were prepared by melt compounding. The nanocomposites are characterized for structure using scanning electron microscopy. The viscoelastic behavior of the nanocomposites is investigated in solid as well as melt state. The study reveals a significant increase in storage modulus especially in the rubbery regime of the polymer matrix and reduced tan delta. Rheological properties in melt show that the complex viscosity and shear storage modulus are increased as a result of incorporation of MWNT. A systematic decrease in the cross over frequency is noted which is attributed to the increased relaxation time. In dielectric analysis, composition dependent enhanced permittivity and conductivity are observed. The thermal stability of the polymer is found to be significantly improved in presence of MWNT's.</p>1 aPatil, Prashant, A.1 aWanjale, Santosh, D.1 aJog, Jyoti, Prakash  uhttps://library.ncl.res.in/content/poly4-methyl-1-pentenemwnt-nanocomposites-001893nas a2200205   4500008004100000022001400041245015300055210006900208260006700277300001400344490000800358520106800366653001501434653002001449653001101469100002801480700002501508700002201533856013201555       2013                        eng d  a0021-899500aMorphology, polymorphism, and metal ion adsorption studies of electrospun nanofibers based on pvdf and organically modified layered double hydroxide0 aMorphology polymorphism and metal ion adsorption studies of elec  a111 RIVER ST, HOBOKEN 07030-5774, NJ USAbWILEY-BLACKWELLcDEC  a4508-45150 v1303 a<p>Nonwoven nanofiber mats of polyvinylidene fluoride (PVDF) with modified layered double hydroxide (MLDH) were prepared by electrospinning. The fiber morphology was studied using scanning electron microscopy. X-ray diffraction and FTIR spectroscopy was used to characterize the polymorphism in electrospun mats. Fibers of diameter in the range 80-800 nm with beads of about 2-3 mu m size were observed for pure PVDF, while in case of PVDF/MLDH nanocomposites the number and size of beads were found to be significantly reduced. Uniform and fine nanofibers were obtained at lower content of MLDH, but slightly rough surface was seen for higher content. FTIR and X-ray diffraction patterns signify various crystalline forms of electrospun PVDF. The content of polar -crystalline phase of PVDF, which exhibit piezo and ferroelectric properties was found to be enhanced significantly due to reinforcement of MLDH. Use of these nanofiber mats for heavy metal Cu (II) removal was explored. (c) 2013 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 130: 4508-4515, 2013</p>10aAdsorption10aelectrospinning10afibers1 aBirajdar, Mallinath, S.1 aWanjale, Santosh, D.1 aLonkar, Sunil, P.  uhttps://library.ncl.res.in/content/morphology-polymorphism-and-metal-ion-adsorption-studies-electrospun-nanofibers-based-pvdf-0