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- W1998886767 abstract "La mesure, par la méthode de la cavité résonnante, de la densité électronique a permis d'étudier l'influence de celle-ci sur la polymérisation de vapeurs organiques dans un plasma haute fréquence. A pression constante la vitesse de dépôt est proportionnelle à la densitéélectronique. Ceci a été vérifié à diverses pressions et pour des monoméres très différents tels le styrène et le méthane. L'introduction dans le plasma de polymérisation d'un gaz étranger modifie les caractéristiques physiques du plasma. Le contrôle de la densité électronique permet d'éliminer ce paramétre et donc de comparer plus valablement l'influence de divers gaz étrangers sur la polymérisation. Ainsi pour des pressions totales, pressions partielles de monomère et densités électroniques identiques, la vitesse de dépôt lorsque le gaz utilisé est l'hydrogéne est supérieure à celle obtenue lorsque l'on utilise l'azote. Ceci peut s'expliquer par l'influence de la température électronique. The polymerization of organic vapours has been studied in a radio frequency plasma (14 MHz) whose electron density has been measured by a resonant cavity method. Changes in the electron density were brought about by modification of the energy input. At constant pressure the rate of deposition has been found to be proportional to the electron density. This is true at different pressures and with such different monomers as styrene and methane. The deposition rate was modified by the introduction of a background gas into the organic plasma, and this was attributed to changes in electron density and temperature. As an illustration, at the same total pressure, monomer partial pressure and electron density, the deposition rate was greater with hydrogen than with nitrogen as a background gas, corresponding to the well-known higher electron temperature in a hydrogen plasma." @default.
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- W1998886767 date "1975-10-01" @default.
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- W1998886767 title "Formation de polymères dans une décharge radio fréquence: influence de la densité électronique" @default.
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- W1998886767 doi "https://doi.org/10.1016/0040-6090(75)90197-2" @default.
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