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采用无溶剂法合成了苯酚-苯胺型单环苯并噁嗪树脂(P-a),然后将其与环氧树脂(EP)进行共聚,并采用差示扫描量热(DSC)法对该共聚体系的固化特性进行了研究。结果表明:不同P-a/EP质量比的复合材料体系,其冲击强度由纯EP体系的16.12 kJ/m2分别降至14.51 kJ/m2(质量比10%)、13.90 kJ/m2(质量比30%)和14.15 kJ/m2(质量比50%);纯EP体系的弯曲强度和弯曲模量分别为100.56 MPa和3.46 GPa,而P-a/EP体系的最大弯曲强度和弯曲模量分别为110.26 MPa和3.84 GPa;EP/P-a体系含氮量最高为3.52%,但各组试样均燃尽,说明单纯增加树脂体系的氮含量并不能有效提高其垂直燃烧性能。
Phenol - aniline monocyclic benzoxazine resin (Pa) was synthesized by solvent - free method. Then the copolymer was copolymerized with epoxy resin (EP) and characterized by differential scanning calorimetry Curing characteristics were studied. The results showed that the impact strength of composite system with different mass ratios of Pa / EP decreased from 16.12 kJ / m2 to 14.51 kJ / m2 (mass ratio 10%), 13.90 kJ / m2 (mass ratio 30%) And 14.15 kJ / m2 (mass ratio of 50%). The flexural strength and flexural modulus of pure EP system were 100.56 MPa and 3.46 GPa, respectively. The maximum flexural strength and flexural modulus of Pa / EP system were 110.26 MPa and 3.84 GPa, respectively ; The highest nitrogen content of EP / Pa system was 3.52%, but the samples of all the groups were burnt out, which showed that simply increasing the nitrogen content of the resin system did not effectively improve the vertical burning performance.