One of the major issues in waxy crude oil (WCO) production is wax deposition, which causes significant losses to the oil sector. New three polymeric nonionic surfactants (PNSs) based on 2-phenylethan-1-amine (I1, I2 & I3) were designed and synthesized in merely two simple processes (ethoxylation and esterification) to inhibit wax crystal development and enhance the cold flowability. To verify the ...