Zobrazeno 1 - 10
of 106
pro vyhledávání: '"E. Urbanovici"'
Publikováno v:
Journal of Thermal Analysis and Calorimetry. 61:209-218
The authors continue their considerations concerning the validity of the steady-state approximation in non-isothermal kinetics. A sequence of two first-order consecutive reactions with an active intermediate was subjected to kinetic analysis by numer
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7a66ca60cc06ef2d57267adebf820d42
https://doi.org/10.1023/a:1010189414530
https://doi.org/10.1023/a:1010189414530
Publikováno v:
Journal of Thermal Analysis and Calorimetry. 60:581-594
A differential method is proposed which uses local heating rates to evaluate non-isothermal kinetic parameters. The method allows to study the influence of the deviation of the true heating rate with respect to the programmed one on the values of the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ebb895cbab3c33d8a09a9652a08fd509
https://doi.org/10.1023/a:1010103206986
https://doi.org/10.1023/a:1010103206986
Publikováno v:
Journal of Thermal Analysis and Calorimetry. 58:677-681
The paper investigates the validity of steady-state approximation for the case of constant rate thermal analysis experiments. It is shown that the approximation holds for the experiments run with a controlled rate of either the decomposition of the c
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::eef655bbe538719ec736785fed09c924
https://doi.org/10.1023/a:1010173015831
https://doi.org/10.1023/a:1010173015831
Publikováno v:
Journal of Thermal Analysis and Calorimetry. 58:683-700
An improved version of the Coats-Redfern method of evaluating non-isothermal kinetic parameters is presented. The Coats-Redfern approximation of the temperature integral is replaced by a third-degree rational approximation, which is much more accurat
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::66694ae3f8136eba21e3436522800b2f
https://doi.org/10.1023/a:1010125132669
https://doi.org/10.1023/a:1010125132669
Publikováno v:
Journal of Thermal Analysis and Calorimetry. 56:851-854
The example of the sequence of reactions \documentclass{aastex} \usepackage{amsbsy} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{bm} \usepackage{mathrsfs} \usepackage{pifont} \usepackage{stmaryrd} \usepackage{textcomp} \usepackage{upgreek}
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b77b867916b0fbd39d4a3b9a82889648
https://doi.org/10.1023/a:1010130928799
https://doi.org/10.1023/a:1010130928799
Autor:
Eugen Segal, E. Urbanovici
Publikováno v:
Journal of Thermal Analysis and Calorimetry. 55:919-924
A general kinetic equation is suggested in order to describe solid state decompositions or, more generally, solid state reactions and transformations on the basis of some existing general equations. This differential equation can be expressed as: dα
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0745dbdf4ef9b4da7dd89f2f48032b48
https://doi.org/10.1023/a:1010198220361
https://doi.org/10.1023/a:1010198220361
Publikováno v:
Journal of Polymer Science Part B: Polymer Physics. 35:359-369
The experimentally estimated 'normalized' rate constants of the bulk crystallization of poly(L-lactic acid) and natural rubber at different temperatures have been used in order to test different equations describing the temperature dependence of the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::44e6b0dd4b7f033161686d814c519d61
https://doi.org/10.1002/(sici)1099-0488(19970130)35:2<359::aid-polb12>3.0.co
https://doi.org/10.1002/(sici)1099-0488(19970130)35:2<359::aid-polb12>3.0.co
Publikováno v:
Journal of Thermal Analysis. 47:931-939
A DSC study was carried out of the isothermal melt crystallization kinetics of poly(L-lactic acid), PLLA, at 110, 115, 120, 125 and 130‡C. The experimental data were evaluated within the framework of the well-known Avrami kinetic model and an exten
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::42833e3e2a7017ff4904365969553e92
https://doi.org/10.1007/bf01979440
https://doi.org/10.1007/bf01979440
Publikováno v:
Thermochimica Acta. 274:173-177
The authors discuss the steady-state approximation for variable temperature and, implicitly in time, kinetic constants, within the framework of the kinetic analysis of a sequence of two first-order consecutive reactions with an active intermediate. I
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ac395da7fbdc533f65f93e24604bddab
https://doi.org/10.1016/0040-6031(95)02557-x
https://doi.org/10.1016/0040-6031(95)02557-x
Autor:
E. Urbanovici, Eugen Segal
Publikováno v:
Journal of Thermal Analysis. 40:1321-1329
The paper deals with the influence of the deviation of the true heating rate with respect to the programmed one on the values of non-isothermal kinetic parameters for the solid-gas thermal decompositions of CaC2O4.H2O and [Ni(NH3)6]Br2. An original m
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3b1a4733de8f28c547406e2203cd8c8d
https://doi.org/10.1007/bf02546896
https://doi.org/10.1007/bf02546896