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The Effect of Polymorphism on the Kinetics of Adsorption and Degradation: A Case of Hydrogen Chloride Vapor on Cellulose
Author(s) -
Niinivaara Elina,
Arshath Shiek Abdullah Abdul,
Nieminen Kaarlo,
Bismarck Alexander,
Kontturi Eero
Publication year - 2018
Publication title -
advanced sustainable systems
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.499
H-Index - 24
ISSN - 2366-7486
DOI - 10.1002/adsu.201800026
Subject(s) - cellulose , chemistry , aqueous solution , adsorption , reactivity (psychology) , polymer , kinetics , polymorphism (computer science) , hydrolysis , crystallinity , chloride , polymer chemistry , molecule , hydrogen bond , hydrogen chloride , inorganic chemistry , chemical engineering , organic chemistry , crystallography , medicine , biochemistry , physics , alternative medicine , pathology , quantum mechanics , genotype , engineering , gene
Control of the reactivity of natural polymers – such as semicrystalline cellulose – through polymorphic transitions is a potent, yet underexplored tool in modern polymer science. Here, the degradation behavior of three artificial cellulose polymorphs (cellulose II, III I , and III II ) in the presence of hydrogen chloride vapor is explored. While the ultimate results of hydrolyses correspond to those found for aqueous HCl, the kinetic scission models exhibit a unique trend for each polymorph, unlike those reported for aqueous acid or enzymatic hydrolyses. In addition to the polymorphic distinctions, these atypical trends are attributed to the nonequilibrium in the hydrolysis set up and the irregular adsorption of HCl molecules to the substrate surfaces. The results point to a new way of approaching the reactivity of natural polymers where polymorphism is regarded as one of the parameters for the kinetics and outcome of chemical reactions.