CRYSTALLIZATION KINETICS OF PEO-ALKALINE PERCHLORATE SOLUTIONS OBSERVED BY ENERGY-DISPERSIVE X-RAY-DIFFRACTION

The crystallization kinetics of poly(ethylene oxide) doped with variou s alkaline perchlorate salts were measured at room temperature by mean s of the new energy dispersive x-ray diffraction method for the phase transition. The experimental points of the transformation coordinate w ere fitted using the phenomenological Liquori-Tripiciano law, the para meters of which were evaluated for each case. The influence of the con centration and of the cation dimensions on the crystallization rate is discussed. Further details about the application of this nonconventio nal diffractometric technique to polymers are also reported, as is an intuitive model for describing the method.