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报道一种新型的侧链含苯甲酰基的芳香醚型苯并噁嗪单体L-1.这种单体熔点低(<125℃)、易溶于普通的有机溶剂.该单体在加热时发生开环聚合,聚合物表现出较高的热稳定性,在氮气中5%的重量损失温度达380℃,在800℃下的残炭率为66%.聚合物也表现出较好的力学性能,用其粘合的两片铝板的层间剪切强度可达6.5 MPa.相反,不含苯甲酰基的芳香醚型苯并噁嗪L-2,其聚合物在氮气中5%热重损失温度、800℃下残炭率和剪切强度分别为322℃,43%和4.7 MPa.可见,芳香醚型苯并噁嗪分子结构中引入大体积的苯甲酰基,可显著地提高树脂的性能.这种新型苯并噁嗪树脂,可望用作纤维增强复合材料基体树脂和金属粘合剂等.
Reported a new type of benzoyl side-chain aromatic ether benzoxazine monomer L-1. This monomer has a low melting point (<125 ℃), soluble in common organic solvents. The monomer in the heating The ring-opening polymerization occurred when the polymer showed high thermal stability with a 5% weight loss temperature of 380 ° C in nitrogen and a residual carbon yield of 66% at 800 ° C. The polymers also showed better Mechanical properties, the two sheets of aluminum bonded with it can have an interlaminar shear strength of 6.5 MPa. In contrast, the benzoxazine-free benzoxazine L-2, which contains 5% of heat of the polymer in nitrogen At the same temperature, the carbon loss rate and the shear strength at 800 ℃ were 322 ℃, 43% and 4.7 MPa, respectively.It can be seen that the introduction of a large volume of benzoyl group in the aromatic ether benzoxazine molecular structure can significantly improve the resin Of the performance of this new benzoxazine resin, is expected to be used as fiber reinforced composite matrix resin and metal adhesives.