Crystallization kinetics of PEO-alkaline perchlorate solutions observed by energy dispersive x-ray diffraction |
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| Authors: | V. Rossi Albertini G. B. Appetecchi R. Caminiti F. Croce F. Cilloco C. Sadun |
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| Affiliation: | 1. Istituto di Struttura della Materia del C.N.R. Via E. , Fermi 38, 00044, Frascati, Italy;2. Dipartimento di Chimica , Istituto Nazionale per la Fisica della Materia Universita “La Sapienza” , P.le A. Moro 5, 00185, Roma, Italy;3. Dipartimento di Chimica , Istituto Nazionale per la Fisica della Materia Universita “La Sapienza” , P.le A. Moro 5, 00185, Roma, Italy;4. Istituto di Struttura della Materia del C.N.R. Via E. , Fermi 38, 00044, Frascati, Italy |
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| Abstract: | The crystallization kinetics of poly(ethylene oxide) doped with various alkaline perchlorate salts were measured at room temperature by means of the new energy dispersive x-ray diffraction method for the phase transition. The experimental points of the transformation coordinate were fitted using the phenomenological Liquori-Tripiciano law, the parameters of which were evaluated for each case. The influence of the concentration and of the cation dimensions on the crystallization rate is discussed. Further details about the application of this nonconventional diffractometric technique to polymers are also reported, as is an intuitive model for describing the method. |
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