超支化聚酯基二茂铁/环氧树脂复合材料的制备及性能

Preparation and characterization of ferrocenyl-terminated hyperbranched polyesters/epoxy resin composite

以第3代环氧端基脂肪族超支化聚酯（EHBP）增韧的环氧树脂（E-51）为基体材料，超支化聚酯基二茂铁（HBPE-Fc）为吸波剂，制备具有一定力学承载及电磁性能的超支化聚酯基二茂铁/环氧树脂（HBPE-Fc/E-51）复合材料，并通过力学性能测试及扫描电镜、矢量网络分析仪等研究了该复合材料的力学及电磁性能。结果表明，添加较低含量的HBPE-Fc能较好地改善环氧树脂体系的拉伸及冲击性能，第4代HBPE-Fc质量分数为2%时，与纯环氧树脂体系相比，HBPE-Fc/E-51复合材料的拉伸强度、断裂伸长率和冲击强度分别提高了21.81%、34.32%和15.41%，对固化体系的拉伸断面分析发现引入HBPE-Fc后材料表现出韧性断裂。HBPE-Fc/E-51复合材料的玻璃化转变温度在105.29~130.27 ℃之间，具有良好的热稳定性，同时该复合材料具有一定的电磁特性。

Ferrocenyl-terminated hyperbranched polyesters/epoxy resin （HBPE-Fc/E-51） composites with mechanical and electromagnetic performance were prepared with the third generation of epoxidized hyperbranched polyesters （EHBP） toughened epoxy resin as matrix material, and ferrocenyl-terminated hyperbranched polyesters （HBPE-Fc） as microwave-absorber. The mechanics and electromagnetic properties of the composites were investigated by mechanics performance tests, SEM and the vector network analyzer. The results indicate that lower content of HBPE-Fc can improve the tensile and impact performance of epoxy resin. Compared with base curing system. When the mass fraction of G4 HBPE-Fc is 2%, the tensile strength, tensile rupture elongation and impact strength increase by 21.81%, 34.32% and 15.41%, respectively. The analysis of tensile fracture surfaces shows that the composites with HBPE-Fc were judged for ductile fracture with the glass transition temperatures for the composites of 105.29-130.27 ℃, and the composites also possess certain electromagnetic properties.