新型阳离子-π交联吲哚基环氧树脂薄膜的制备与表征

Preparation and Characterization of Novel Indole-based Epoxy Resin Film Cross-linked by Cation-π

以双吲哚和环氧氯丙烷为原料制备了一种含吲哚结构的新型环氧树脂(双吲哚二缩水甘油胺),并通过核磁共振氢谱和红外光谱证实其结构。将双吲哚二缩水甘油胺、聚醚胺D-400和Mg按一定比例简单共聚制备了新型阳离子-π交联吲哚基环氧树脂薄膜,利用红外光谱仪、扫描电子显微镜、电子万能试验机等对薄膜的结构和性能进行了表征。结果表明,Mg的引入提高了环氧树脂的力学性能,当Mg掺杂质量分数为2.5%时,薄膜具有优异的力学性能,拉伸强度为12.4 MPa,断裂伸长率为178%,对比未掺杂Mg的环氧树脂拉伸强度和断裂伸长率分别提高了107%和93%。通过对环氧树脂改性实现了同时提高环氧树脂强度和韧性的目的。

The new indole-based epoxy resin(bisinddiglycidolamine)was prepared by using diacindine and epichlorohydrin,and the structure of bisinddiglycidolamine was confirmed by hydrogen nuclear magnetic resonance(~1H NMR)and infrared spectra.A novel indole-based epoxy resin film cross-linked by cation-πwas prepared by simple copolymerization of bisinddiglycidolamine,polyetheramine D-400 and Mgin a certain proportion.The structure and properties of the film were represented through the testing of infrared spectroscopy,scanning electron microscopy and electronic universal test machine.The results show that the introduction of Mgimproves the mechanical properties of the epoxy resin.When the content of Mgis 2.5%,the film has excellent mechanical properties.The tensile strength of film is 12.4 MPa and the elongation at break of film is 178%,which are increased by 107%and 93%compared with the empty epoxy resin,respectively.The toughness and strength of epoxy resin are improved simultaneously by modifying epoxy resin.