Study On Phthalocyanine Modification Of Maleimide Resin

The high performance composite materials have been applied in the fields of energy, transportation, aviation and aerospace extensively. Developing the resin which has the excellent processability, heat resisting and mechanical properties is the target that researchers who dedicated to the composite material always pursues.The maleimide is the important species of the advanced high performance polymeric composition. It has not only the heat, radiation and damp resisting property of maleimide, which are similar with the polyimide, but also the similar processability of epoxy resins; it can satisfy the requirement of the advanced resin in much aspect. Therefore, it is a kind of high performance resin to be subjected to more and more concerns. But due to the high crosslinking density after cured, the cured product become more brittleness. So the study on modification of maleimide resin is focused on how to improve the tenacity of the material, at the same time, keep the excellent heat resisting property,the electricity and the high modulus of the material, effectively. But both physical and chemical modifications usually reduce the heat resisting property of maleimide.In recent years, Keller et al. has done a great deal of work on phthalocyanine resins based on bisphthalonitrile compounds. The results showed that phthalocyanine resins had the excellent heat resisting property and stability, the thermal and mechanical properties could be controlled by controlling the level of solidified agent used and post-curing condition. So it is interest that modifying the maleimide resins by phthalocyanine resins. And so far, we have seen no articles on this method of modifying maleimde were reported.Two kinds of N-substituted phenyl maleimide which contain cyano-group were synthesized and the structure of them was characterized. The mechanism of curing reactions and the thermal property of cured product were studied by thermal analysis. It was proved that the thermal property of the cured product could be improved effectively by introducing phthalocyanine into maleimide.We introduced amine operating as curing agent into the maleimide containing cyano-group. The structure of them was confirmed. The mechanism of curing reactions and the thermal property of cured product were studied by thermal analysis.We made the free radicals reaction for the maleimde above, and the factors of the reaction condition affecting the reaction were studied .The molecular weight, solubility and thermal property of the homopolymers were also studied.