traditional e beam cure the present invention provides in one aspect a method for curing a polysilazane fiber that is already formed one such embodiment is illustrated in fig1 the method includes exposing a polysilazane fiber that contains a at least one alkenyl group and b a free radical generator to moisture 1 a and curing the polysilazane fiber by exposing it to a temperature above the 1 hr half life temperature of the free radical generator but below the softening point temperature of the moisture exposed polysilazane fiber 1 b the moisture cure converts at least a portion of the silazane to siloxane in the polymer fiber by hydrolysis condensation processes one illustration of this is shown in the reaction below the hydrolysis of the u2014 nhsime 3 end groups and their subsequent condensation leads to the crosslinking of the resin as can be seen above ammonia is the by product of this process the hydrolysis condensation process allows for the softening point temperature of the fiber to be increased as discussed more fully below the present invention provides in one aspect a method for forming and curing a polysilazane fiber one such embodiment is described in fig2 first a resin is formed by reacting at least one methylchlorodisilane at least one organochlorosilane comprising at least one alkenyl group and at least one nitrogen containing additive 2 a in some embodiments the methylchlorodisilane is 1 2 dichloro 1 1 2 2 tetramethyldisilane in some embodiments the methylchlorodisilane is 1 1 2 trichloro 1 2 2 trimethyldisilane in some embodiments the methylchlorodisilane is 1 1 2 2 tetrachloro.