Abstract:

A new type of hydrogen bonding mediated interpolymer complexes based on long chain methacrylate were prepared by emulsion polymerization using K₂S₂O₈-Na₂SO₃ as the redox initiator system. The effects of  synthesis temperature, the molar ratio of reductant to oxidant on drag reducing efficiency and  monomer composition on the shear stability of the complexes were studied.The influences of temperature, shearing rate, concentration and monomer composition of rheological properties of the interpolymer complexes diesel solution were also investigated. When the performance of shear stability was the best, the optimum synthesis technological conditions were obtained. Rheological studies showed that the  proton donor and proton acceptor polymers diesel solution fitted with the pseudoplastic fluid respectively, which accordded with the power-law equation. When γ^.<200s-1, the rheological curve of the interpolymer complexes deviated from the power-law equation. The results also showed that the variation of viscosity with temperature and concentration of the interpolymer complexes is apparently different from that of its association predecessor. Finally, a potential measurement of shear stability was obtained.

Key words:  drag reducer, hydrogen bond, shear stability, rheological behavior