Py-bz Resins Non Covalent Modification Of Graphene And Application

Benzoxazine resin(BZ) is one kind of new thermosetting resins and it is similar to phenolic resin(PF). It has many excellent properties, such as the wide raw material sources, low cost. At present, It has gradually been applied in aerospace, electronics, transportation and other fields. This thesis involves the synthesis and characterization of diffirent type of aminopyrene benzoxazine resin(Py-BZ); The graphene modified by diffirent Py-BZ resins;And the properties and curing behabiors of the modify graphene/ cyanate resin(MG/CE) composite materials.Firstly, aminopyrene was synthesized by using pyrene as raw material.Then,various benzoxazine monomers contained pyrene structure were synthesized by using different monophenols and bisphenol A. FTIR, NMR,GPC, elemental analysis, UV-Vis were used to analyze their structure, and the curing temperature and curing behavior of those benzoxazine monomers were measured by DSC. TG was used to research the carbon yield ration of benzoxazine monomers.Secondly, Graphene were functionalized by using pC-p BZ, pP-p BZ,Ba-p BZ as modifier respectively. The absorption of benzoxazine monomers on the surface of graphene was qualitatively explained by FTIR and sedimentation expriment. The amount of benzoxazine monomers absorbed on the surface of graphene were quantitatively calculated by the analysis of UV-vis and TG respectively. The topographies of the surface of graphenes were observed by SEM, and the results showed that the surface of graphenes were as the same as the original surface, which means the original performance of grapheme will be remained after modified by benzoxazine monomers.Finally, The modified graphene/ cyanate ester resin (MG/CE) were prepared by solution blending, and the MG/CE composites were obtained by curing process at programmed high temperature. The curing behavior of the blends, thermal properties and mechanical properties of the curing products were studied by DSC, TG and DMTA respectively. The morphology of the cross section of the curing products were observed by SEM.