烯丙基COPNA-BMI树脂的力学性能

Mechanical Properties of the Copolymer Resin of Allyl COPNA Resin and BMI

以1-萘酚为单体、对苯二甲醇为交联剂在对甲苯磺酸的催化作用下合成缩合多核芳烃(COPNA)树脂,经烯丙基化处理后与二苯甲烷双马来酰亚胺(BMI)反应制备烯丙基COPNA-BMI共聚树脂,并对这种共聚树脂的力学性能进行了研究。结果表明,共聚树脂具有优异的力学性能,当烯丙基COPNA树脂与BMI质量比为1:1时,其拉伸强度、断裂伸长率、硬度和弯曲强度分别达76.8MPa、3.1%、28HV、160.7MPa;共聚树脂的拉伸断口微裂纹扩展区处出现了韧窝,显示出一定的韧性。

The condensed polynuclear aromatic （COPNA） resin was synthesized using 1-naphthol as monomer and 1,4-benzenedimethanol as crossing-linking agent in the presence of p-toluene sulfonic acid,and then allylated to obtain ally COPNA resin.The copolymer of the ally COPNA resin and bismaleimide （BMI） was prepared,and its mechanical properties were studied in this paper.The properties and morphologies of the cured copolymer were characterized by mechanical testing machine and scanning electronic microscope （SEM）.The results show that the copolymer exhibits good mechanical properties,indicated by that tensile strength,elongation at break,flexural strength and Vickers hardness of the copolymer arrives at 76.8 MPa,3.1%,162.3 MPa and 27.9 respectively,when the mass ratio of the ally COPNA resin to BMI is 1：1.Moreover,the copolymer has fracture toughness,showing some dimples and ductile deformation in fractured surfaces of the copolymer.