聚四氟乙烯密封的研究进展

四氟

摘　要:聚四氟乙烯（PTFE）是一类具有较好耐化学特性、耐高温的高分子材料。从聚四氟乙烯的组成、结构及物理化学特性等方面，介绍了其在密封方面的应用，并对改性聚四氟乙烯和膨胀聚四氟乙烯（EPTFE）作了详细的介绍。最后对聚四氟乙烯在密封方面的发展作了进一步的阐述。
关键词:聚四氟乙烯 密封 改性 共混 接枝

Research Progress on Sealing of PolytetrafluoroethyleneLi Dawu, Xing Ting, Sun Ting, Li JieCollege of Science Northeast University, Shenyang 110004; No. 16 Senior Middle School, Shenyang 110032AbstractTFE was a new macromolecular material with very high chemical resistance and high temperature resistance. This made them good candidate materials for load - bearing components exposed to harsh environments. The applications of FTFE were introduced in sealing because of composition, structure, physics and chemical performance in this paper. The application of modified PTFE and expanded PTFE were also described in detail. The sealing development were expatiated in conclusion.
Key words:polytetrafluoroethylene; sealing; modified; blend; graft