The tribological performances of diisobutyl phthalate, dipentyl phthalate, di?n?octyl phthalate, di ( 2?ethyl?hexyl) phthalate, dinonyl phthalate, and diisodecyl phthalate were investigated under the loads form 5 N to 98 N. The re?sults show that the friction coefficients of the six esters tend to decrease with the increasing of the time at the different loads. Among the six phthalate esters, diisodecyl phthalate shows the lowest friction coefficient under the all loads, howev?er whose friction coefficient is changed greatly under the low loads( about 5 N) . Under the same loads, the average f...
