Die bei der anodischen Oxidation von Phenothiazin entstehenden 1,lO′‐ und 3,10′‐Biphenothiazinyle und die aus 3,7‐disubstituier‐ ten Phenothiazinen (Substituenten: tert.‐Butyl, ‐Cl, ‐SCN) gebildeten 1,10′‐Biphenothiazinyle sind als Modelle von Molekülen mit zwei elektroaktiven Zentren in einem Resonanz‐System anzusehen.
Summary: A new method of polymerising PET in the solid state is proposed in either a gas phase reactor, or in hydrocarbon dispersion. It is shown that the reaction can be carried out efficiently at temperatures on the order of 200–240 °C directly from a prepolymer without the need for a melt phase step. It is shown that the crystal structure of the prepolymer plays a determining role in the kinetics of the SSP reaction.Schema of the reactor used for gas phase SSP.magnified imageSchema of the reactor used for gas phase SSP.
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