Ethylene dielectric spectra

From these findings it was concluded that the polymerization must take place via a complex of all three components. It was established by diverse experiments that ethylene oxide enters into the complex with phenol in the form of an etherate. If the three components are added together in the appropriate proportions in a solvent, then a minimum is observed in the solubility, in vapor pressure, and in the relative permittivity (dielectric constant), together with a maximum in the density. A disappearance of the OH bands is observed in the infrared spectrum. Therefore, the complex must possess OH-inactive oscillations, i.e., in which the H atom lies in a plane between three oxygen atoms. The following formulation was proposed for the reaction ... 

Dielectric measurements have been made by Buckingham and Belling [96] on ethylene/propylene copolymers. The data show an increase in the loss in range of 10 -10 Hz due to some more polarity of PP. Unlike low dielectric losses in PE, the copolymer spectrum exhibits a a-relaxation peak at 10 Hz at room temperature. The effect of oxidation on the microwave behaviour of PE can be seen in the data of Ref. [95]. A loss peak at 10 Hz (room temperature) increased with time of oxidation. 

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