| abstract |
(57) Abstract: [Objective] To provide a continuous process for producing a polymeric material by subjecting all volume elements in a viscous stream to a substantially uniform uniform history of temperature and residence time. thing. Comprising: mixing a reactant, optionally in the presence of a solvent, to form a liquid reactant stream, heating the reactant stream, and allowing sufficient reaction time to form a polymeric material. , The improvement rapidly heated and controlled the reactant flow in a microwave resonant cavity operating with microwave energy that produced TM 0n0 mode with minimal heating at the radial boundaries of the reactant flow Independent of mass flow, from the time the reactant stream enters the microwave cavity to the time the product is removed from the above annular zone, allowing the reaction to continue as it proceeds in a substantially closed flow through the annular zone of volume. To give a constant total residence time to An improved process for making polymers. |