Polymer Bulk Composites with Strong Noncovalent Interface Interactions

The paper discusses the possibility of obtaining polymer composite materials with a high content of layered carbon filler (over 50 wt %). The application of the vacuum self-assembly method for this purpose is described. Graphene oxide synthesized by the modified Hammers method was used as a filler. Oligoamidoimide and phenol-formaldehyde oligomer were used as a binder for the preparation of composites. An increase in the ordering of the structure of the polymer layers adjacent to the filler particles is confirmed by the data X-ray diffraction analyses. It is shown that the breaking stress in tension increases by 1.1-1.6 times, and the elongation at the break by 1.2-1.7 times. The optimal concentration of graphene oxide, in this case, is 60-80 wt %. A mechanism is proposed that underlies the increase in mechanical properties based on a change in the nature and spatial density of bonds between functional groups of the polymer and filler.