高强度多胶粉云母带粘合剂的研制　

Preparation of the Binder for Rich Micapaper Tapes with High Strength

在苯甲酸铅的作用下，将自制的改性剂引入环氧－双马来酰亚胺－ＴＯＡ体系中，获得了综合性能良好的高强度多胶粉云母带用粘合剂Ｉａ。该粘合剂不仅具有长的室温贮存期（大于四个月），而且其固化体系在维持优良的介电性能的同时，胶条的室温冲击强度为１３．６ｋＪ／ｍ~２，１５５℃的静态弯曲强度为１３．０ＭＰａ；用玻璃布增强的云母板材，室温冲击强度为８１．５ｋＪ／ｍ~２，室温或１５５℃的静态弯曲强度为２８３．４ＭＰａ或１２９．ＩＭＰａ。此外，在温度低于 ２００℃时，固化物的动态力学模量均大于 １００ＭＰａ。

The binder Ia for rich micapaper tapes with high strength and other excellent properties is prepared by using a selfmaking modifier introduced into the Epoxy - Bismaleimide - TOA(tung oil anhydride) system with lead benzoate as catalysis. It has long shelf life(more than 4 months) at room temperature due to its high curing reaction apparent activation energy(Ea > 70kJ/mol). The cured system, including bar and mica plank reinforced with glass fiber, remains good dielectricproperties either at room temperature or at 155℃.In addition, for the bar, the impact strength σ_(i) is up to 13. 6 kJ/m^(2) at room temperature, the static flexural strength σ_(f) arrives tol3. 0 MPa at 155℃, and for the mica plank σ_(i) = 81. 5kJ/m^(2),σ_(f) = 283 .4MPa at room temperature and σ_(f) = 129. 1MPa at 155℃. Moreover, within the range from room temperature to 200℃,the dynamic mechanical moduli of binder Ia cured system are greater than 100MPa.