论文部分内容阅读
采用氨基保护和还原方法合成了对氨基苯炔丙基醚(APPE),与苯酚和多聚甲醛通过Mannich缩合制备了含炔丙基的苯并噁嗪(P-APPE)。采用溶液共混的方法,将P-APPE与苯酚/苯胺型苯并噁嗪(PAF)和含硅芳炔树脂(PSA)共混得到了改性苯并噁嗪树脂。用差示扫描量热法、动态热力学分析、热失重分析和宽频介电仪研究了该树脂体系的热性能和介电性能。研究结果表明:PSA加入到苯并噁嗪树脂中可提高共混树脂的热性能,加入质量分数为14.3%的PSA可使共混树脂的Tg从195℃提高至235℃,其5%热失重温度从350℃提高至399℃;共混树脂的介电损耗因子和介电常数随PSA加入量的增加而降低。玻璃纤维布增强的共混树脂复合材料的层间剪切强度和弯曲强度在加入质量分数为5.3%的PSA后下降超过50%。
Aminophenylacetopropyl ether (APPE) was synthesized by amino protection and reduction method. Propargyl benzoxazine (P-APPE) was prepared via Mannich condensation with phenol and paraformaldehyde. The modified benzoxazine resin was obtained by blending P-APPE with phenol / aniline benzoxazine (PAF) and silicon-containing aralkyne resin (PSA) by solution blending method. The thermal and dielectric properties of the resin system were investigated by differential scanning calorimetry, dynamic thermodynamic analysis, thermogravimetric analysis and broadband dielectric spectroscopy. The results show that the addition of PSA to benzoxazine resin can improve the thermal properties of the blend resin. Adding PSA with mass fraction of 14.3% can increase the Tg of blend resin from 195 ℃ to 235 ℃, and the 5% The temperature increased from 350 ℃ to 399 ℃. The dielectric loss factor and dielectric constant of the blends decreased with the addition of PSA. The interlaminar shear strength and flexural strength of glass fiber cloth-reinforced blend resin composites decreased by more than 50% after adding 5.3% mass PSA.