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采用简洁的方法,合成了一种新型侧链含长氟碳链的苯并噁嗪单体(M1),并研究了其热固化反应和固化产物的性能.结果表明,M1的起始固化温度为257℃,但当加入5 wt%的咪唑催化剂后,其固化起始温度降低至183℃.M1聚合物具有优异的热稳定性,在氮气氛中其5%和10%热重损失温度分别为337和382℃,800℃碳残余率为45.9%.该固化树脂亦具有良好的介电性能,在1 MHz频率下其介电常数为3.78.常温下固化树脂的吸水率小于1%,表面自由能为6.98 mN/m.以上结果表明侧链含氟的苯并噁嗪有望成为一种性能优异的新型绝缘材料.
A novel benzoxazine monomer (M1) with long fluorocarbon chain was synthesized by a simple method and its thermal curing reaction and the properties of the cured product were studied.The results showed that the initial curing temperature Was 257 ° C, but when 5 wt% imidazole catalyst was added, the cure onset temperature was decreased to 183 ° C The M1 polymer had excellent thermal stability with 5% and 10% loss on temperature 337 and 382 ℃, the carbon residual rate is 45.9% at 800 ℃ .The cured resin also has good dielectric properties and dielectric constant of 3.78 at 1 MHz.The moisture absorption of the cured resin is less than 1% at room temperature, the surface The free energy is 6.98 mN / m. These results indicate that fluorine-containing side-chain benzoxazine is expected to become a new type of high performance insulating material.