NEW POLYPHOSPHAZENES WITH UNSATURATED SIDE-GROUPS - USE AS REACTION INTERMEDIATES, CROSS-LINKABLE POLYMERS, AND COMPONENTS OF INTERPENETRATING POLYMER NETWORKS

A number of new poly(organophosphazenes) have been synthesized which b ear 2-butenoxy or (4-(allyloxy)phenyl)phenoxy side groups. Cosubstitue nt groups included trifluoroethoxy, phenoxy, or (benzyloxy)phenoxy gro ups. Species with (4-(allyloxy)phenyl)phenoxy units underwent Si-H cou pling with linear silanes or siloxanes to extend the side groups and f orm hybrid phosphazene/organosilicon polymers. A number of these polym ers are rubbery elastomers which are readily cross-linked by heat or l ight. Seven of the mixed-substituent, cross-linked polymers were incor porated into interpenetrating polymer networks (IPN's) with polystyren e, poly(methyl methacrylate), polyacrylonitrile, poly(acrylic acid), a nd poly(dimethylsiloxane). The phase compatibility characteristics of the IPN's were assessed by DSC, TEM, FT-IR spectroscopy, and H-1 and P -31 NMR spectroscopy data.