新型环氧树脂潜伏性促进剂的合成、表征及性能研究

Synthesis,Characterization and Properties of Novel Latent Thermal Catalyst for Epoxy Resin

合成了新型环氧树脂潜伏性促进剂三(乙酰乙酸十八酯)铝,采用DSC,FT-IR,H-NMR、元素分析分别对其热分解机理、化学结构、物质纯度进行了表征。研究了以环氧ZH92-21:双酚S:三(乙酰乙酸十八酯)铝=100:3:0.5为配比的树脂体系的固化制度、潜伏性和力学性能,树脂体系的表观粘度在室温储藏7个月后基本没有变化,相分离是其具有优异潜伏性的主要原因。

Latent thermal catalysts, aluminum tris（octadecylacetoacetate） was synthesized. The synthesized catalyst fulfills requirements for long storage stability at room temperature and a rapid cure at a moderately elevated temperature in curing epoxy resins. The thermal behavior, the molecular structures, the purity of aluminum compounds were characterized by differential scanning calorimeter （DSC） , FT-IR spectrum, ^1H-NMR spectrum and element analysis. The cure system, thermal latency and mechanical properties of epoxy ZH 92-21/4,4＇- Dihydroxydiphenylsulfone/aluminum tris（octadecylacetoacetate） system were also investigated. The viscosity of the resin system showed little change after 7 months and the phase change of the resin system led to a long shelf life.