石墨填充对均苯型聚酰亚胺材料性能的影响
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摘要
以均苯四甲酸酐(PMDA)和4,4'-二氨基二苯醚(ODA)为原料,通过热亚胺化的方式,合成不同石墨填充量的均苯型聚酰亚胺模塑粉,并对其化学结构、比浓对数黏度和石墨含量进行测试表征。将聚酰亚胺模塑粉热模压成型,制备聚酰亚胺复合材料,测试石墨填充对其力学性能和摩擦性能的影响。结果表明,石墨的加入对聚酰亚胺树脂的化学结构没有明显影响。随着石墨质量分数的增大,聚酰亚胺材料的力学性能有所下降,但高温性能保持能力有所提升。石墨的加入显著改善了聚酰亚胺材料的摩擦磨损性能,摩擦系数和磨痕宽度明显降低。
In this paper, pyromellitic dianhydride(PMDA) and 4,4'-diaminodiphenyl ether(ODA) were used to prepare graphite-filled polypyromelliticimide polyimide materials with different amounts of graphite through thermal imidization. The chemical structures, inherent viscosities and graphite contents of polyimide molding powder were measured. The polyimide materials were prepared by hot molding method, and the influence of graphite filling on their mechanical properties and friction properties were tested. The results showed that the addition of graphite had no significant effect on the chemical structure of the polyimide resins. As the graphite content increased, the mechanical properties of the polyimide materials decreased, meanwhile, the abilities to maintain high temperature performance were improved. The addition of graphite significantly improved the friction and wear properties of the polyimide material, and the friction coefficient and the wear scar width were reduced obviously.
In this paper, pyromellitic dianhydride(PMDA) and 4,4'-diaminodiphenyl ether(ODA) were used to prepare graphite-filled polypyromelliticimide polyimide materials with different amounts of graphite through thermal imidization. The chemical structures, inherent viscosities and graphite contents of polyimide molding powder were measured. The polyimide materials were prepared by hot molding method, and the influence of graphite filling on their mechanical properties and friction properties were tested. The results showed that the addition of graphite had no significant effect on the chemical structure of the polyimide resins. As the graphite content increased, the mechanical properties of the polyimide materials decreased, meanwhile, the abilities to maintain high temperature performance were improved. The addition of graphite significantly improved the friction and wear properties of the polyimide material, and the friction coefficient and the wear scar width were reduced obviously.
引文
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[6]郝继璨,鲁云华,肖国勇,等.原位氨基化氧化石墨烯/聚酰亚胺复合材料的制备及性能[J].复合材料学报,2018,35(6):1377-1385.
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[9]王运良,于晓慧,王丽娜,等.均苯型聚酰亚胺模塑粉的制备与性能[J].高等学校化学学报,2012,33(10):2356-2360.
[10]陈天华.碳纳米管/石墨/碳纤维增强聚酰亚胺树脂复合材料的摩擦磨损性能研究[J].广东化工,2018,45(6):9-10.
[2]李生柱,吴建华,朱小华,等.高性能聚酰亚胺的进展[J].化工新型材料,2002,30(6):18-24.
[3]刘彩召,孙明明,张斌,等.联苯四甲酸二酐异构体对聚酰亚胺性能的影响[J].中国胶粘剂,2019,28(3):5-9.
[4]YANO K,USUKI A,OKADA A,et al.Synthesis and properties of polyimide-clay hybrid[J].Journal of Polymer Science Part A:Polymer Chemistry,1993,31(10):2493-2498.
[5]周德洋,张彤,王晓东,等.空心玻璃微球/聚酰亚胺复合薄膜的制备及性能表征[J].塑料工业,2018,46(3):29-32.
[6]郝继璨,鲁云华,肖国勇,等.原位氨基化氧化石墨烯/聚酰亚胺复合材料的制备及性能[J].复合材料学报,2018,35(6):1377-1385.
[7]李友清,刘丽,刘润山.聚酰亚胺的改性[J].化工新型材料,2003,31(8):20-23,26.
[8]贾均红,周惠娣,高生强,等.聚酰亚胺复合材料的摩擦性能及其机理研究[J].摩擦学学报,2002,22(4):273-276.
[9]王运良,于晓慧,王丽娜,等.均苯型聚酰亚胺模塑粉的制备与性能[J].高等学校化学学报,2012,33(10):2356-2360.
[10]陈天华.碳纳米管/石墨/碳纤维增强聚酰亚胺树脂复合材料的摩擦磨损性能研究[J].广东化工,2018,45(6):9-10.
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