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Kinetics and Chemorheological Analysis of Cross-Linking Reactions in Humins.
- Source :
- Polymers (20734360); Nov2019, Vol. 11 Issue 11, p1804-1804, 1p, 1 Diagram, 1 Chart, 8 Graphs
- Publication Year :
- 2019
-
Abstract
- 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<subscript>α</subscript>-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<subscript>α</subscript>. The shift from chemical to diffusion control was also estimated. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 20734360
- Volume :
- 11
- Issue :
- 11
- Database :
- Complementary Index
- Journal :
- Polymers (20734360)
- Publication Type :
- Academic Journal
- Accession number :
- 139864019
- Full Text :
- https://doi.org/10.3390/polym11111804