Results 251 to 260 of about 26,195 (294)
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MATHEMATICAL MODELLING AND SIMULATION OF NON-ISOTHERMAL CRYSTALLIZATION OF POLYMERS
Mathematical Models and Methods in Applied Sciences, 2001This paper is devoted to the study of mathematical problems arising in the modelling of nonisothermal polymer crystallization under industrial conditions. A review of the hybrid stochastic-deterministic modelling procedure, which yields an averaged model,5,8 is given and supplied by the study of mathematical problems arising from it.
Burger, Martin, Capasso, Vincenzo
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Isothermal and non-isothermal crystallization of a fresnoite glass
Journal of Non-Crystalline Solids, 2013Abstract Several analytical models have been widely applied to determine the activation energy of crystallization, E , and the Avrami index, n . In this work, the parameters E and n for the crystallization of fresnoite (2BaO·TiO 2 ·2SiO 2 ) glass were calculated using different approaches (Ozawa, Kissinger, and Matusita & Sakka).
Alisson M. Rodrigues +3 more
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Non-isothermal crystallization of PCL/CLAY nanocomposites
Advanced Materials Letters, 2018Fil: Lanfranconi, Matias R.. Consejo Nacional de Investigaciones Cientificas y Tecnicas. Centro Cientifico Tecnologico Conicet - Mar del Plata. Instituto de Investigaciones en Ciencia y Tecnologia de Materiales. Universidad Nacional de Mar del Plata. Facultad de Ingenieria.
Lanfranconi, Matias R. +2 more
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Kinetics of non-isothermal crystallization of polyethylene and polypropylene
Polymer, 1983Abstract Differential scanning calorimetry (d.s.c.) data on non-isothermal crystallization of isotactic polypropylene and high-density polyethylene from the melt at different cooling rates were treated in terms of the Ozawa equation. It was found that the crystallization of polypropylene follows the Ozawa equation but in the case of polyethylene the ...
Marek Eder, Andrzej Wlochowicz
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Non‐Isothermal Crystallization of Bovine Milk Fat
Journal of the American Oil Chemists' Society, 2007AbstractThe crystallization kinetics of milk fat were studied under non‐isothermal and simulated adiabatic conditions using pulsed NMR spectroscopy. Isothermal experiments confirmed that when milk fat is shock cooled to below the α melting point it crystallizes in two steps due to the different crystallization kinetics of α and β′ modifications. In non‐
Patrick W. M. Janssen +1 more
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Non-isothermal crystallization kinetics of As30Te60Ga10 glass
Applied Physics A, 2017The crystallization study under non-isothermal conditions of As30Te60Ga10 glass was investigated. The studied composition was synthesized by melt-quenching technique and characterized by different techniques such as X-ray powder diffraction (XRD), scanning electron microscopy (SEM) and differential scanning calorimetry (DSC).
Mansour Mohamed +4 more
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Important Matters of Non-Isothermal Crystallization Method
Applied Mechanics and Materials, 2014Non-isothermal crystallization method was performed for pure PLLA and a blend of 50/50 wt% PEO/PLLA samples. The spherulite radial growth rate was calculated and compared to what was acquired using the isothermal crystallization method. It is found that both the fitting order and the decimal number of the fitting polynomial functions heavily affect the
Xiao Can Zhang +4 more
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DSC non-isothermal crystallization curves in polyoxymethylene
Colloid & Polymer Science, 1995Non-isothermal crystallization curves by differential scanning calorimetry for two-dimensional spherulite growth in polyoxymethylene have been modeled using the Avrami equation, taking into account heat dissipation in the sample holder during the phase transition.
C. J. G. Plummer, H. -H. Kausch
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Non-isothermal crystallization of PET/PLA blends
Thermochimica Acta, 2009Binary blends of poly(ethylene terephthalate) with poly(lactic acid), PET/PLA, were studied by differential scanning calorimetry and X-ray scattering. The PET/PLA blends, prepared by solution casting, were found to be miscible in the melt over the entire composition range. Both quenched amorphous and semicrystalline blends exhibit a single, composition
Huipeng Chen, Marek Pyda, Peggy Cebe
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Non-isothermal crystallization in amorphous selenium films
Journal of Thermal Analysis, 1982The usual determination of kinetic parameters of crystallization of amorphous products is based on isothermal measurements. In general the crystallization of amorphous selenium thin films is studied by non-isothermal experiments (DTA). The adaptation to non-isothermal crystallization of the Avrami transformation rate equation allows us to determine ...
J. Grenet, J. P. Larmagnac, P. Michon
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