Abstract: A method for removing heat from a horizontal linear flow reactor, comprising introducing vapor bubbles into a liquid medium in the reactor and removing the vapor from the reactor. A method of producing an elastomer reinforced polymer comprising autorefrigerating the reactants in a horizontal linear flow reactor in which both initial polymerization and phase inversion occur. A method of removing heat from a horizontal plug flow reactor comprising aerating the reactants within the reactor, wherein the aeration promotes radial mixing of the reactants but does not substantially promote axial mixing of the reactants. A horizontal linear flow reactor, comprising a horizontal reaction chamber having one or more mechanical flow facilitators disposed therein and a sparger attached to the bottom of at least a portion of the reaction chamber.