Abstract
The thermal decomposition of divinyl ether has been studied at temperatures between 460° and 500°C, and at pressures from 30 to 1000 mm. That the reaction has a chain mechanism, chains being broken on the walls at low pressure and in the gas phase at high pressure, is concluded from the effects of (a) increased surface, (b) added nitrogen (c) varying temperature coefficient with pressure and (d) induced decomposition with azomethane. The over-all order at high pressure is three-halves judged both from the individual velocity constants during a run and from the variation of velocity constant with pressure.

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