GONG Pijian, WANG Haiyan, TANG Haiyan, et al. Synthesis and tribological properties of non-phosphorus and sulfur-free heterocyclic derivatives of triazine as lubricant additives[J]. CIESC Journal, 2017, (4): 1702-1711.
GONG Pijian, WANG Haiyan, TANG Haiyan, et al. Synthesis and tribological properties of non-phosphorus and sulfur-free heterocyclic derivatives of triazine as lubricant additives[J]. CIESC Journal, 2017, (4): 1702-1711.DOI: 10.11949/j.issn.0438-1157.20161472.
Two kinds of non-phosphorus and sulfur-free triazine derivatives lubricant additive 2
4
6-tri-morpholine-sym-triazine (named as CMMM) and 2
4
6-tri-phenol-sym-triazine (named as CPPP) were synthesized using cyanuric chloride
morpholine and phenol as raw materials
their structures were characterized by FT-IR and elemental analysis. The thermal stabilities of CMMM and CPPP were studied by thermal analysis
and their solubility properties were also researched. The friction reducing
anti-wear and load-carrying capacities of CMMM and CPPP in rapeseed oil were investigated by four-ball test. CMMM and CPPP were mixed with T202 respectively
and the tribological properties of them were also tested. The surface morphology and the elemental composition of the tribofilms were investigated by scanning electron microscopy (SEM) and energy dispersive X-ray spectroscopy (EDS)
respectively. The results revealed that the synthetic products were the target compounds CMMM and CPPP
they completely dissolved and had good soluble properties in rapeseed oil. The decomposition temperature of CMMM and CPPP ranged from 270.16℃ to 347.58℃
and from 285.26℃ to 478.45℃
respectively. The thermal stability of CPPP was better than that of CMMM. CPPP exhibited more superior tribological performances than CMMM under different experimental conditions of test loads and additive concentrations. The excellent tribological property of CPPP may be due to the phenol ring is tighter than the morpholine ring
which plays an important role in friction reducing and anti-wear of boundary lubrication. The best ratio of CMMM to T202 was 5:5