Authors:L. Mendes, R. Abrigo, V. Ramos, and P. Pereira
of compatibility can be reached [ 5 , 14 – 17 ].
The aim of this work was to investigate the effect of PC with different melt flow rates and cobalt catalyst as modifier agents of thermal and rheologicalproperties of PET/PC reactive blending
Authors:J.C. Spada, L.D.F. Marczak, I.C. Tessaro, and N.S.M. Cardozo
, N. , Biasutti , M. , Venir , E. , Spaziani , M. & Marchesini , G. ( 2009 ): Effect of high-pressure homogenization on droplet size distribution and rheologicalproperties of ice cream mixes . J. Dairy Sci. , 92
Authors:W. Ciesińska, J. Zieliński, and T. Brzozowska
Coal-tar pitch was modified by addition of polystyrene, poly(ethylene terephthalate), unsaturated polyester and coumarone-indene
resin. The optimum conditions for production of homogeneous binary pitch-polymer blends containing 10% w/w of the polymer were established. Softening points, contents of toluene and quinoline-insoluble matters and rheological properties
of the blends were determined. The yield of solid fraction in semi-coking the blends was also found. The effect of polymers
on the coal-tar pitch blend properties was evaluated. Some pitch-polymer blends were then carbonized to carbon sorbents used
for purification of water and wastewater.
Authors:L. L. A. Vermeersen, R. Riva, and R. Sabadini
The 3D quasi-static displacements during and following an earthquake provide a wealth of information on the internal structure and rheological properties of the Earth. If an earthquake occurs in a region that has shallow-viscosity zones inside the crust or at the top of the mantle (asthenosphere), then post-seismic displacements of the crust on the order of millimeters per year are possible. These can be detected by means of permanent GPS stations in the years following a faulting event. In this paper we systematically study the influence of viscoelastic simulation model restrictions on co- and post-seismic deformation. Examples include stratification of the Earth model, modeling of the seismic source, influence of compressibility, effects of position and viscosities of shallow low-viscosity layers. It will be shown that some of these model restrictions or assumptions can have non-negligible influences on the simulated 3D co- and post-seismic displacements.
Authors:J. Santos, L. Lima, Iêda Santos, and A. Souza
The thermal degradation process of mineral base lubricating oils was
studied in this work by means of thermal, spectroscopic and rheologic analysis.
The lubricating oils were degraded at temperatures varying from 150 to 210C,
and for degradation times from 1 to 48 h. After the degradation, the lubricating
oils were characterized by X-ray fluorescence, IR and NMR spectroscopies,
rheological properties and thermal analyses (TG/DSC). The spectroscopic analyses
determined the oxidation reaction products. TG curves indicate that the thermal
stability of lubricating oils is below 161C. TG curves in air present
three mass loss stages, whereas in nitrogen there are only two mass loss steps.
DSC analyses in air indicate two highly exothermic peaks related to hydrocarbon
oxidation and combustion processes, while in nitrogen only two endothermic
peaks were observed. The decrease in the degradation temperature led to a
decrease of the lubricant viscosity.