摘要
酸酐固化环氧树脂体系比胺固化的体系具有更优异的力学和电气性能以及高温热稳定性能,但需要较高和较长的固化温度和时间。尽管在室温下有一定的使用期,为了节红能源和缩短生产周期,通常用叔胺类促进剂加快其固化反应速率,但此时体系的使用期较短。因此研制一种能用于酸酐固化环氧树脂体系的潜伏性促进剂是十分必要的。理想的潜伏性促进剂应使其在室温下的贮存使用期不受影响,且在一定的温度下具有较快的固化反应速率,此外,固化产物应具有良好的机电热性能。
A transition metal acetylacetone was studied as latent accelerator in the curing of anhydride cured epoxy resin by DSC, TEA, and rotation viscometer technique. The results reveal that the metal acetylacetone serves as an latent accelerator for anhydride curable epoxy resin system, and the rate of curing is found to increase with enhanced concentrations of the metal chelate. The system provides very fast gel time at 160-180℃ and combined with very good storage stability (> two months). Curing kinetic studies reveal that the overall curing process follows first order kinetics. The electrical, mechanical and thermal properties of cured compound of epoxy resin system catalyzed by the MT(acac)n and BDMA accelerator and cured by anhydride was also studied and compared in this paper.
出处
《高分子学报》
SCIE
CAS
CSCD
北大核心
1993年第4期485-489,共5页
Acta Polymerica Sinica
关键词
酸酐
环氧树脂
金属络合物
固化
Anhydride-epoxy resin, Latent accelerator, Transition metal acetylacetone chelate, Curing kinetic, Electrical, Mechanical, Thermal properties