氰酸酯/线性酚醛/环氧树脂三元体系的研究

 在氰酸酯树脂/ 环氧树脂体系中引入了线性酚醛树脂,得到氰酸酯树脂/ 环氧树脂/ 线性酚醛树脂三元共聚体系。采用差示扫描量热法(DSC) 研究了三元共聚体系的反应动力学,根据Kissinger 方程和Ozawa 方程得到体系的表观活化能( Ea) :62. 94kJ / mol,确定了体系的反应速率常数K。比较了纯氰酸酯树脂、氰酸酯/ 环氧树脂体系和三元树脂体系玻璃布层压板的力学性能、介电性能以及吸湿率。结果表明,线性酚醛树脂用量为15wt %的三元体系复合材料的弯曲强度和层间剪切强度分别比氰酸酯/ 环氧树脂体系复合材料提高了6 %和15 %,介电损耗和吸水率分别降低了33 %和8 %。

Study on Cyanate Ester/Epoxy Resin/Novolac Resin Co-Curing System

The ! kinetics and properties of bisphenol A dicyanate ester/ epoxy resin/ novolac resin system were discussed. Differential scanning calorimetry(DSC),Kissinger equation and Ozawa equation were employed to detect thekinetics of co-curing system. The apparent reactive activation energy ( E_a) was 62.94kJ / mol, and velocity constantof reaction under 25 ℃( K₂₅ ℃) was 9184 ×10 - 51 Dielectric and mechanical properties of the laminate composite reinforced by E-glass were investigated. The results showed that composite of co-curing system possess excellent integrated properties. Compared with composition based on cyanate ester/ E-51 system,inclusion of 15wt % novolac resinled to 6 % and 15 % increase in the flexural strength and interlaminar shear strength, respectively. The dielectricloss and water absorption decreased 33 % and 8 %, respectively.