Chemical structure effect of (meth) acrylic ester copolymers and modified poly (ethylene-co-vinyl acetate) copolymer on paraffin deposition prevention in crude oil

Acrylic and methacrylic esters copolymers, in various compositions, were sy nthesized in order to study the chemical structure effect over their effect iveness as pour point reducers in crude oil. Copolymerization results data from octadecyl methacrylate, hexadecyl methacrylate with methyl methacrylat e and octadecyl acrylate, hexadecyl acrylate with methyl acrylate revealed superior results for acrylate monomers compared to methacrylate ones. Copol ymers of ethylene and vinyl acetate (EVA) containing 19, 31 and 40% of viny l acetate were chemically modified aiming to improve their performance as p our point reducer in crude oil. Ester pendant groups were introduced in the copolymer main chains resulting in meaningful increase of their performanc e as additive.