Tribology of Polymer Blends PBT + PTFE

Materials

卷:14

AlinaCantaragiu Ceoromila¹  Lorena Deleanu²  Constantin Georgescu²  Larisa Chiper Titire² 

[1] Department of Applied Sciences, Cross-Border Faculty, “Dunarea de Jos” University of Galati, 800008 Galati, Romania;

[2] Department of Mechanical Engineering, Faculty of Engineering, “Dunarea de Jos” University of Galati, 800008 Galati, Romania;

关键词: polybutylene terephthalate (PBT);    polytetrafluoroethylene (PTFE);    blend PBT + PTFE;    block-on-ring test;    linear wear rate;    friction coefficient;   

DOI  :  10.3390/ma14040997

来源: DOAJ

【 摘 要 】

This paper presents results on tribological characteristics for polymer blends made of polybutylene terephthalate (PBT) and polytetrafluoroethylene (PTFE). This blend is relatively new in research as PBT has restricted processability because of its processing temperature near the degradation one. Tests were done block-on-ring tribotester, in dry regime, the variables being the PTFE concentration (0%, 5%, 10% and 15% wt) and the sliding regime parameters (load: 1, 2.5 and 5 N, the sliding speed: 0.25, 0.5 and 0.75 m/s, and the sliding distance: 2500, 5000 and 7500 m). Results are encouraging as PBT as neat polymer has very good tribological characteristics in terms of friction coefficient and wear rate. SEM investigation reveals a quite uniform dispersion of PTFE drops in the PBT matrix. Either considered a composite or a blend, the mixture PBT + 15% PTFE exhibits a very good tribological behavior, the resulting material gathering both stable and low friction coefficient and a linear wear rate lower than each component when tested under the same conditions.

【 授权许可】

Unknown