Kinetics of mesophase transition of lyotropic chitosan in dichloroacetic acid

Autor:	Zhong-ming Hu, Dacheng Wu, Shou-xi Chen, Li-heng Wu
Rok vydání:	2001
Předmět:	Polymers and Plastics Chemistry Kinetics Nucleation Mesophase Dichloroacetic acid General Chemistry Surfaces Coatings and Films Light intensity chemistry.chemical_compound Chemical engineering Lyotropic liquid crystal Phase (matter) Lyotropic Materials Chemistry Organic chemistry
Zdroj:	Journal of Applied Polymer Science. 80:1770-1775
ISSN:	1097-4628 0021-8995
DOI:	10.1002/app.1272
Popis:	The mesophase transition and its kinetics of chitosan in the solutions of chitosan/dichloroacetic acid (DCA) were investigated by means of DSC and depolarized light intensity technique, respectively. The mesophase formation of chitosan in DCA involves nucleation and growth. The isothermal kinetics of mesophase formation from isotropic phase were described by Avrami using the equation with an exponent n close to 1, which suggests that the formation of chitosan mesophase is a process of instantaneous nucleation and one-dimensional rod-like growth in the temperature range investigated. This was confirmed by small angle light scattering Hv patterns of the mesophase. © 2001 John Wiley & Sons, Inc. J Appl Polym Sci 80: 1770–1775, 2001
Databáze:	OpenAIRE
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