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-0