also contemplated that a plurality of torches could be circularly arrayed as shown in fig7 and 8 and the powder to be treated could be fed by a screw injector or other such arrangement downstream of the arrayed torches such an arrangement would also be utilized in conjunction with a single torch as in the embodiment of fig6 the invention will now be described by specific examples wherein the embodiments of the apparatus of this invention shown in the drawings are used a cascade arc reactor of the type shown in fig1 of the drawings and containing a cascade arc system has a 2 mm diameter pathway and a monomer inlet system located at the downstream side of the anode the vacuum chamber is evacuated to a system pressure of less than 1 mtorr and argon is then introduced at the end cap 7 on the cathode side of the reactor at a flow rate of approximately 2000 sccm min an arc is generated by applying a voltage of 700 volt and tetrafluoroethylene is introduced into the monomer inlet at a flow rate of approximately 12 sccm min a cold drawn steel sheet 3 cm u00d7 3 cm is placed at the tip of the.