VITREOUS STATE DECOMPOSITION STUDY IN SOME AQUEOUS POLYALCOHOLS SOLUTIONSReport as inadecuate




VITREOUS STATE DECOMPOSITION STUDY IN SOME AQUEOUS POLYALCOHOLS SOLUTIONS - Download this document for free, or read online. Document in PDF available to download.



Abstract : The aim of this work is to present an experimental study of the stability of vitreous state obtained after quenching at 77 K in the case of both aqueous glycerol and 1,2-propanediol solutions. This study has been performed by means of internal friction measurements and X ray observations, i.e., X ray diffraction and small angle X ray scattering. By means of annealing treatments, it has been possible to point out two mechanisms for the decomposition of vitreous state : - first, involving ice crystallization with three temperature domains corresponding to i nucleation ii nucleation and growth where cubic to hexagonal ice transformation occurs iii Ostwald ripening mechanisms are evidenced. - second, involving a vitreous state being decomposed into two vitreous phases having a different water concentration.





Author: R. Vassoille G. Vigier A. El Hachadi G. Thollet J. Perez

Source: https://hal.archives-ouvertes.fr/



DOWNLOAD PDF




Related documents