新型自催化氰基树脂的制备及其初步热性能

合成了两种分子主链结构上含有氨基和酰亚胺结构的自催化氰基单体,采用~1H-NMR对单体结构进行了表征,运用DSC对其固化行为进行研究,并与其他可自催化氰基单体进行对比,运用FFIR和TGA对固化物的结构和热稳定性进行了初步表征.DSC测试结果表明,含酰亚胺结构的自催化氰基单体熔融后,250～300℃给出明显的固化放热峰.FTIR验证了氰基固化形成的结构.TGA测试表明其具有较好的热性能,空气和N_2中的T_d~5 均高于510℃,且N_2中残重高于60%.

PreparationandThermalPropertiesofNovelSelf-CatalystResinWithCyanoGrou

Two kinds of self-catalyst cyano resin with NH_2-group and imide structure in the main chain were synthesized, whose struture were characterized with ~1H-NMR. DSC was used to investigate the curing behavior of the cyano resin and comparison was made with other self-catalyst monomer. The structure and thermal properties of cured resin were studied with FTIR and TGA respectively. The results of DSC show that both of the self-catalyst cyano resins give on exothermic peak from 250 to 300℃ after melting, due to the curing reaction. Furthermore, FTIR spectra demonstrated that the expected structures of cured resins are formed. And the resins have excellent thermal property, T_d~5 of which is above 510℃ not only in nitrogen but also in air, the decomposition residues of which is over 60% in nitrogen at 900℃.