Tribological Properties of PTFE/PEI and Graphite/PEI Blends†

doi:10.7503/cjcu20140416

Abstract

Abstract:

The tribological performances of polyetherimide(PEI) composite materials filled with polytetrafluoroethylene(PTFE) and graphite were evaluated on UMT-2 friction and wear tester, respectively. The microstructures of worn surfaces, cross-sections of the PEI composite were examined with scanning electron microscope(SEM), and wear mechanism was analyzed. The result showed that PEI composite filled with PTFE and graphite were improved significantly on friction and wear properties. The friction coefficient is reduced to below 0.3(the friction coefficient of pure PEI is 0.41), the wear rate is reduced by 3 orders of magnitude. When filled with 10%PTFE in composites PTFE system, the friction coefficient of the composites is lowest, and the friction coefficient of the graphite counterpart is lowest in 15% graphite content. The lowest friction coefficient is 0.23 and 0.27. For the wear rate, PEI composite materials filled with PTFE and graphite are both decreased with the content increasing respectively. Consequently, compared with the PEI composite materials filled with graphite, the PEI composite materials filled with PTFE has more excellent tribological performance and mechanical behavior. The mechanical behavior of two kinds of the PEI composites was also measured, such as tensile strength, bending strength, impact strength and Rockwell hardness. The results show that, when the mass fraction of 5%—15%, which is the best tribological performance improvement in addition, comprehensive mechanical properties of blends of materials is still good.

Key words: Polyetherimide, Polytetrafluoroethylene, Graphite, Tribological performance

CLC Number:

O632

TrendMD:

MA Yanqiong, TAN Zhongyang, LI Yujie, WANG Daming, DANG Guodong, CHEN Chunhai. Tribological Properties of PTFE/PEI and Graphite/PEI Blends^†[J]. Chem. J. Chinese Universities, 2014, 35(12): 2720.

Figures/Tables 3

Fig.1 Variations of friction coefficient(A) and wear volume loss(B) with mass fraction of PTFE(a) and graphite(b) in PEI

Fig.2 Variation of the tensile strength(A), bending strength(B), impact strength(C) and Rockwell hardness(D) of PI/PTFE(a) and PEI/graphite(b) blends with mass fraction of PTFE and graphite in PEI

Fig.3 SEM micrographs of worn surface of pure PI(A), worn surface of PEI/10%PTFE(B) and worn surface of PEI/15%graphite(C) Load: 1 MPa; sliding velocity: 200 r/min; test duration: 60 min.

References 22

[1]	Reinicke R., Haupert F., Friedrich K., Injection Moulded Thermoplastic Composites, 1998, 29A, 763—771
[2]	Apichartpattanasiri S., Hay J. N., Kukureka S. N., J. Wear, 2001, 251, 1557—1566
[3]	Li W. Z., Deng F., New Chemical Materials, 2011, 39(5), 7—10
	(李文忠, 邓飞. 化工新型材料, 2011, 39(5), 7—10)
[4]	Wen S.Z., The Principle of Tribology, Tsinghua University Press, Beijing, 2008
	(温诗铸. 摩擦学原理, 北京: 清华大学出版社, 2008)
[5]	Zhu Y. J., Wang H. Y., Yang S. H., Li S., Lubrication Engineering, 2012, 37(7), 41—44
	(朱艳吉, 汪怀远, 杨淑慧, 林珊. 润滑与密封, 2012, 37(7), 41—44)
[6]	Yu Z. Y., Wang H. F., Xu Y., Luo Z. K., Yang H., Wang W. L., Zhang C. D., Lubrication Engineering, 2012, 37(7), 53—55
	(余志扬, 汪海风, 徐意, 罗仲宽, 杨辉, 王文理, 张成德. 润滑与密封, 2012, 37(7), 53—55)
[7]	Yang J. F., Pei X. Q, Wang Q. H, Wang Y. M., Polymer Materials Science and Engineering,2010, 26(8), 50—53
	(杨景锋, 裴先强, 王齐华, 王延梅. 高分子材料科学与工程,2010, 26(8), 50—53)
[8]	Cai H., Yan F. Y., Xue Q. J., Materials Science and Engineering,2004, A364, 94—100
[9]	Zhu P., Fei H. Y., Chen Z. L., Wang X. D., Hang P., Liang X., Lubrication Engineering, 2007, 32(2), 98—101
	(朱鹏, 费海燕, 陈震霖, 王晓东, 黄培, 梁铣. 润滑与密封, 2007, 32(2), 98—101)
[10]	Wang H. Y., Feng X., Shi Y. J., Lu X. H., Journal of University of Science and Technology Beijing, 2007, 29(2), 182—185
	(汪怀远, 冯新, 史以俊, 陆小华. 北京科技大学学报, 2007, 29(2), 182—185)
[11]	Wang H., Zhang S., Wang G., Yang S. H., Zhu Y. J., J. Wear, 2013, 297(1), 736—741
[12]	Yang D. Y., Wang Y., Gong J., Wang H. G., Ren J. F., Gao G., Lubrication Engineering, 2013, 38(11), 72—77
	(杨东亚, 王月, 龚俊, 王宏刚, 任俊芳, 高贵. 润滑与密封, 2013, 38(1), 72—77)
[13]	Guo L., Yang H. W., Yang S. L., Synthetic Lubricants, 2013, 39(4), 1—3
	(郭力, 杨宏伟, 杨士钊. 合成润滑材料, 2013, 39(4), 1—3)
[14]	Huang S. B., Gao Z. M., Ma X. Y., Guo H. Q., Qiu X. P., Gao L. X., Chem. Res. Chinese Universities, 2012, 28(4), 752—756
[15]	Li P., Chen C. H., Wang D. J., Zhou H. W., Zhao X. G., Dang G. D., Chem. J. Chinese Universities, 2010, 31(1), 212—214
	(李鹏, 陈春海, 王冬佶, 周宏伟, 赵晓刚, 党国栋. 高等学校化学学报, 2010, 31(1), 212—214)
[16]	Wang L. Q., Sun J. W., Gu L., Lubrication Engineering, 2007, 32(10), 1—3
	(王黎钦, 孙健伟, 古乐. 润滑与密封, 2007, 32(10), 1—3)
[17]	Rattan R., Bijwe J., Fahim M., J. Wear, 2007, 262(5/6), 727—735
[18]	Bijwe J., Indumathi J., Ghosh A. K., J. Wear, 2002, 253(7/8), 803—812
[19]	Bijwe J., Indumathi J., Rajesh J. J., Fahim M., J. Wear, 2001, 249, 715—726
[20]	Bijwe J., Indumathi J., J. Wear, 2004, 257(5/6), 562—572
[21]	Chang L., Zhang Z., Zhang H., Friedrich K., J. Tribology International, 2005, 38, 966—973
[22]	Zhang Q., Chen X. Y., Wang G., Lu A., Wang P. P., China Plastics, 2007, 21(11), 32—35
	(张晴, 陈晓媛, 王港, 卢爱, 王萍萍. 中国塑料, 2007, 21(11), 32—35)