%0 Journal Article
%T Kinetics and Chemorheological Analysis of Cross-Linking Reactions in Humins
%J Polymers | An Open Access Journal from MDPI
%D 2019
%R https://doi.org/10.3390/polym11111804
%X 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 ( E ¦Á-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 E ¦Á. The shift from chemical to diffusion control was also estimated
%U https://www.mdpi.com/2073-4360/11/11/1804