Synthesis and Characterization of Schiff Base Metal Complexes and Reactivity Studies with Malemide Epoxy Resin
作者:B. Lakshmi、K.N. Shivananda、Gouda Avaji Prakash、Arun M. Isloor、K.N. Mahendra
DOI:10.5012/bkcs.2012.33.2.473
日期:2012.2.20
A novel malemide epoxy containing Co(II), Ni(II) and Cu(II) ions have been synthesized by curing malemide epoxy resin (MIEB-13) and Co(II), Ni(II) and Cu(II) complexes of macrocyclic bis-hydrazone Schiff base. The Schiff base was synthesized by reacting 1,4-dicarbnyl phenyl dihydrazide with 2,6-diformyl-4-methyl phenol. The Schiff base and its Co(II), Ni(II) and Cu(II) complexes have been characterized by elemental analyses, spectral (IR, $^1H$ NMR, UV-vis., FAB mass, ESR), thermal and magnetic data. The curing reaction of maleimide epoxy compound with metal complexes was studied as curing agents. The stability of cured samples was studied by thermo-gravimetric analyses and which have excellent chemical (acid/alkali/solvent) and water absorption resistance. Further, the scanning electron microscopy (SEM) and definitional scanning colorimetric (DSC) techniques were confirmed the phase homogeneity of the cured systems.
含有 Co(II)、Ni(II) 和 Cu(II) 离子的新型马来酰亚胺环氧树脂已通过马来酰亚胺环氧树脂 (MIEB-13) 和 Co(II)、Ni(II) 和 Cu(II) 大环双缩醛席夫碱复合物的固化合成。席夫碱是通过 1,4-二羰基苯基二酰肼与 2,6-二甲酰-4-甲基苯酚反应合成的。通过元素分析、光谱 (IR、¹H NMR、UV-vis.、FAB 质谱、ESR)、热学和磁性数据对席夫碱及其 Co(II)、Ni(II) 和 Cu(II) 复合物进行了表征。研究了马来酰亚胺环氧化合物与金属复合物作为固化剂的固化反应。通过热重分析研究了固化样品的稳定性,这些样品具有出色的化学(酸/碱/溶剂)和水吸收抗性。此外,扫描电子显微镜 (SEM) 和定义扫描比色法 (DSC) 技术证实了固化体系的相均质性。