scholarly journals Kinetics and Chemorheological Analysis of Cross-Linking Reactions in Humins

Polymers ◽  
2019 ◽  
Vol 11 (11) ◽  
pp. 1804 ◽  
Author(s):  
Sangregorio ◽  
Guigo ◽  
Jong ◽  
Sbirrazzuoli
Keyword(s):  
Complex Viscosity ◽  
Isoconversional Method ◽  
Effect Of Temperature ◽  
Diffusion Control ◽  
Model Free ◽  
Platform Chemicals ◽  
Model Free Kinetics ◽  
Acid Catalyzed ◽  
Advanced Isoconversional Method ◽  
Kinetics Of

Humins is a biomass-derived material, co-product of the acid-catalyzed conversion of cellulose and hemicellulose to platform chemicals. This work presents a thorough study concerning the crosslinking kinetics of humins by chemorheological analysis and model-free kinetics under isothermal and non-isothermal curing. Humins can auto-crosslink under the effect of temperature, and the reaction can be fastener when adding an acidic initiator. Thus, the effect of P-Toluenesulfonic acid monohydrate (pTSA) on the crosslinking kinetics was also studied. The dependencies of the effective activation energy (Eα-dependencies) were determined by an advanced isoconversional method and correlated with the variation of complex viscosity during curing. It is shown that humins curing involves multi-step complex reactions and that the use of an acidic initiator allows faster crosslinking at lower temperatures, involving lower Eα. The shift from chemical to diffusion control was also estimated.

Influence of carbon nanofillers on the curing kinetics of epoxy-amine resin

RSC Advances ◽  
2015 ◽  
Vol 5 (110) ◽  
pp. 90437-90450 ◽  
Author(s):  
L. Vertuccio ◽  
S. Russo ◽  
M. Raimondo ◽  
K. Lafdi ◽  
L. Guadagno
Keyword(s):  
Activation Energy ◽  
Curing Kinetics ◽  
Isoconversional Method ◽  
Epoxy Amine ◽  
Carbon Nanofillers ◽  
Advanced Isoconversional Method ◽  
Kinetics Of

Variation of the activation energy with conversion obtained by “advanced isoconversional method”.

Chemorheological analysis and model-free kinetics of acid catalysed furfuryl alcohol polymerization

2007 ◽  
Vol 9 (39) ◽  
pp. 5359 ◽  
Author(s):  
Nathanael Guigo ◽  
Alice Mija ◽  
Luc Vincent ◽  
Nicolas Sbirrazzuoli
Keyword(s):  
Furfuryl Alcohol ◽  
Model Free ◽  
Model Free Kinetics ◽  
Kinetics Of

scholarly journals Kinetics of Thermolysis of Nickel(II) Perchlorate Complex with n-Propylamine

2014 ◽  
Vol 2014 ◽  
pp. 1-5 ◽  
Author(s):  
Chandra Prakash Singh ◽  
Abhishek Singh
Keyword(s):  
Model Fitting ◽  
Isoconversional Method ◽  
Nitrogen Atmosphere ◽  
Molecular Formula ◽  
Fast Heating ◽  
Isothermal Tg ◽  
Model Free ◽  
Different Temperatures ◽  
Explosion Delay ◽  
Kinetics Of

Complex of nickel perchlorate with n-propylamine has been synthesised with molecular formula [Ni(n-pa)3(ClO4)(H2O)]ClO4. It has been characterised by elemental analysis, thermogravimetry, UV-VIS, and IR spectroscopic data. Thermal properties have been investigated by thermogravimetry (TG) in static air and by simultaneous thermogravimetry-derivative thermogravimetry-differential thermal analysis (TG-DTG-DTA) in flowing nitrogen atmosphere. Kinetics of thermolysis has been analysed applying model-fitting and model-free isoconversional method on isothermal TG data recorded at five different temperatures. To observe the response of complex towards fast heating, explosion delay time has been recorded at various temperatures and kinetics of explosion has been studied using these data.

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