富勒烯(C60)-苯乙烯-丙烯酸三元共聚物的合成及其润滑性能

通过自由基聚合合成了一种新型纳米级富勒烯-苯乙烯-丙烯酸三元共聚物，该聚合物易溶于碱性水、甲醇、四氢呋喃等溶剂。采用FTIR、UV-240等进行结构表征。TEM分析表明其在水溶液中形貌为理想的球形，平均粒径约为36nm。四球机试验测试结果表明，一定浓度的该富勒烯共聚物可有效增强抗磨能力。对其磨斑表面采用电子扫描显微镜分析,结果表明，磨痕变浅．磨斑减小．有效地降低了磨损。

Synthesis of Fullerene Styrene-acrylic Acid Copolymer Nanoball and Its Lubrication Properties

A novel fullerene-styrene-acrylic acid copolymer was synthesized via radical polymerization .It is soluble in polar solvents such as water, methanol, acetone, tetrahydrofuran. The product was characterized by FTIR,UV-Vis and GPC. TEM analysis shows that the average particle diameter is about 36 nm. Four-ball tests shows that the addition of a certain concentration of the fullerene copolymer to base stock can effectively raise the load-carrying capacity (P_B value), and raise the antiwear ability. SEM analysis shows that the additive results in reducing diameter of wear scar and decreasing wear. The physical structure of the fullerene copolymer nanometer tiny balls may be described as follows: the core is very hard fullerene, the shell is styrene-acrylic acid copolymer, which may be relatively soft but very elastic. The fullerene copolymer plays the role of a solid lubricant. Since fullerene has very high load-carrying capacity and the fullerene copolymer is nanometer tiny balls with core-shell structure, which can penetrate into rubbing surfaces and deposit there, it is reasonable to speculate that the fullerene copolymer nanometer balls may be more effective than styrene-acrylic acid copolymer to support and isolate two relative motion surfaces, and therefore, the load-carrying capacity and anti-wear performance of the base stock were improved.