Comparative analyses on isothermal kinetics of water evaporation and PAAG hydrogel dehydration under the microwave heating conditions

2017 ◽  
Vol 122 ◽  
pp. 113-120 ◽  
Author(s):  
B. Adnadjević ◽  
M. Gigov ◽  
J. Jovanović
Keyword(s):  
Microwave Heating ◽  
Isothermal Kinetics ◽  
Water Evaporation ◽  
Comparative Analyses ◽  
Kinetics Of

Comparative study on isothermal kinetics of fullerol formation under conventional and microwave heating

2008 ◽  
Vol 140 (1-3) ◽  
pp. 570-577 ◽  
Author(s):  
Borivoj Adnađević ◽  
Mihajlo Gigov ◽  
Milena Sindjic ◽  
Jelena Jovanović
Keyword(s):  
Comparative Study ◽  
Microwave Heating ◽  
Isothermal Kinetics ◽  
Kinetics Of

scholarly journals The Effect of Methacrylic Acid and Maleic Acid on the Isothermal Kinetics of Acrylic Acid Crosslinking Co-polymerization under Conventional and Microwave Heating

2019 ◽  
Vol 1 (2) ◽  
Author(s):  
Jelena Dragoslav Jovanovic ◽  
Borivoj Adnadjevic
Keyword(s):  
Acrylic Acid ◽  
Kinetic Parameters ◽  
Microwave Heating ◽  
Methacrylic Acid ◽  
Maleic Acid ◽  
Kinetics Model ◽  
Conventional Heating ◽  
Isothermal Kinetics ◽  
Synthesis Process ◽  
Kinetics Of

The kinetics of free-radical crosslinking co-polymerization (FRCCP) of acrylic acid (AA) with both methacrylic acid (MA) (PAMA hydrogel ) and maleic acid (MAL) (PAMAL hydrogel) was investigated under the conditions of isothermal conventional heating (CH) and under the conditions of microwave heating (MWH) with controlled cooling.   The kinetics curves of FRCCP of PAMA and PAMAL hydrogels under the conditions of CH are described with the kinetics model of second order chemical reaction, whereas the kinetics curves under the conditions of CH are described with the kinetics model of Polany-Winger.  It is proved that MWH leads to the changes in the rate of  FRCCP and to the changes in the values of the kinetic parameters (activation energy (Ea) and pre-exponential factor (lnA).  It was found the existence of relationship between the values of the kinetic parameters calculated for MWH and CH for PAMA and PAMAL hydrogel synthesis process, which is well-known as compensation effect. The effect of MWH on the kinetics of FRCCP for PAMA and PAMAL hydrogel formation were explained by applying the model of activation by selective energy transfer (SET). The changes in kinetics model, rate of FRCCP and kinetics parameters, caused with the MWH can found wide application in designing novel technologies for obtaining polymers and for synthesis of polymers with  novel physico-chemical properties.  The suggested mechanism of activation for polymerisation under the conditions of MWH also enables development of novel reaction systems and technologies for polymers productions. 

Kinetics of Water Evaporation from Emulsions

2005 ◽  
Vol 36 (5) ◽  
pp. 425-430 ◽  
Author(s):  
A. M. Pavlenko ◽  
B. I. Basok
Keyword(s):  
Water Evaporation ◽  
Kinetics Of

Non-isothermal Kinetics of Free Radical Polymerization of 2-Phenylethyl (Meth)acrylate

2018 ◽  
Vol 8 (3) ◽  
pp. 585-594
Author(s):  
Khdbudin Mulani ◽  
Ravindra Ghorpade ◽  
Surendra Ponrathnam ◽  
Nayaku Chavan ◽  
Kamini Donde
Keyword(s):  
Free Radical ◽  
Radical Polymerization ◽  
Free Radical Polymerization ◽  
Isothermal Kinetics ◽  
Kinetics Of

Isobaric and isothermal kinetics of gelatinization of waxy maize starch

2007 ◽  
Vol 82 (4) ◽  
pp. 443-449 ◽  
Author(s):  
Shyam S. Sablani ◽  
S. Kasapis ◽  
Z.H. Al-Tarqe ◽  
I. Al-Marhubi ◽  
M. Al-Khuseibi ◽  
...  
Keyword(s):  
Isothermal Kinetics ◽  
Maize Starch ◽  
Waxy Maize ◽  
Kinetics Of

scholarly journals Isothermal and non-isothermal kinetics of hydrolysis of 1-[2-(2- pentyloxyphenylcarbamoyloxy)-(2-methoxymethyl)-ethyl]- perhydroazepinium chloride (BK 129)

2013 ◽  
Vol 60 (2) ◽  
pp. 43-48
Author(s):  
Stankovičová M. ◽  
Bezáková Ž. ◽  
Beňo P. ◽  
Húšťavová P.
Keyword(s):  
Biological Activity ◽  
Alkaline Hydrolysis ◽  
Functional Group ◽  
Isothermal Kinetics ◽  
Basic Part ◽  
Buffer Solutions ◽  
Kinetics Of Hydrolysis ◽  
Short Time ◽  
Kinetics Of ◽  
Hydrolysis Of

Abstract The substance BK 129 - 1-[2-(2-pentyloxyphenylcarbamoyloxy)-(2-methoxymethyl)-ethyl]-perhydroazepinium chloride was prepared in terms of influence of the connecting chain between the carbamate functional group and the basic part of molecule on biological activity. Such a structural feature is important with regard to its stability. In this work we determined the rate constants of alkaline hydrolysis of this compound at increased temperature under isothermal and non-isothermal conditions. The hydrolysis was also performed in buffer solutions with the purpose of evaluating its stability. Non-isothermal tests of stability enable to reduce the number of analyses. The necessary data for stability of compound are in this way achieved in a short time.

Isothermal kinetics of reduction and carburization of WO3–NiO nanocomposite powder by CO/CO2

2016 ◽  
Vol 128 (1) ◽  
pp. 553-566 ◽  
Author(s):  
Hurieh Mohammadzadeh Valendar ◽  
Dawei Yu ◽  
Mansoor Barati ◽  
HamidReza Rezaie
Keyword(s):  
Isothermal Kinetics ◽  
Nanocomposite Powder ◽  
Kinetics Of ◽  
Kinetics Of Reduction
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