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以环氧树脂(EP)、双马来酰亚胺(BDM)作为纯双酚A型苯并二噁嗪(BA-a)树脂的改性共聚单体,研究了不同改性BA-a体系的粘接性能和热稳定性能。结果表明:纯BA-a树脂与钢材之间的拉伸剪切强度为15.34 MPa,说明纯BA-a树脂具有作为胶粘剂的潜力;当m(BA-a)∶m(EP)∶m(BDM)=100∶60∶0或100∶27∶27时,改性BA-a体系的拉伸剪切强度为24.81 MPa或21.36 MPa,160℃时凝胶时间为150 min或20 min;改性BA-a体系的热稳定性能依次为BA-a/甲基四氢苯酐体系>BA-a/EP体系>BA-a/BDM体系>纯BA-a体系。
A modified comonomer of pure bisphenol A benzodioxazine (BA-a) was synthesized by epoxy resin (EP) and bismaleimide (BDM) Adhesion and thermal stability. The results show that the tensile shear strength between pure BA-a resin and steel is 15.34 MPa, which indicates that pure BA-a resin has the potential of being an adhesive. When m (BA-a): m (EP): m ) = 100: 60: 0 or 100: 27:27, the tensile shear strength of modified BA-a system is 24.81 MPa or 21.36 MPa, and the gel time is 150 min or 160 min at 160 ℃. Modified BA The thermal stability of -a system is BA-a / methyl tetrahydrophthalic anhydride system> BA-a / EP system> BA-a / BDM system> pure BA-a system.