The application provides a cage type
toughening agent and a preparation method thereof and a high-temperature-resistant low-loss
adhesive film and a preparation method thereof, and belongs to the technical field of
resin composite materials.The application uses active
end group polyimide and POSS as monomers for preparing the cage type
toughening agent, uses a catalyst to promote the reaction of the monomers, uses an
organic solvent to dissolve the monomers and form liquid drops containing the monomers, uses a dispersing agent to disperse the liquid drops, and obtains the cage type
toughening agent through
suspension polymerization in the case that deionized water is used as a continuous phase.The cage type toughening agent provided by the application uses POSS as an inner core and uses a high-temperature-resistant
thermoplastic polyimide resin with active end groups as an outer shell, the POSS provides high-
temperature resistance,
flame resistance and low
moisture absorption, the
polyimide layer provides primary toughening, the POSS provides secondary toughening, and the cage type toughening agent has the effect of double toughening; and the cage type toughening agent has good
solubility and interfacial combination, can be matched with
nitrile group resin, and can be used as a toughening agent for
nitrile group resin.