Naslov
Molecular interaction and viscometric behavior of mixtures of polyolefin and poly(styrene-co-dodecyl methacrylate-co-octadecyl methacrylate) rheology modifiers in solution of lubricating base oil

Autori
Jukić, Ante ; Faraguna, Fabio ; Franjić, Ivana ; Kuzmić, Sunčica

Izvornik
Journal of industrial and engineering chemistry (1226-086X) 56 (2017); 270-276

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
lubricating oils ; molecular interaction ; polymer additives ; viscosity

Sažetak
Miscibility and rheological properties like kinematic viscosity at 40 °C and 100 °C, viscosity index, shear stability and pour point for solutions of polyolefin copolymer (OCP) and terpolymer poly(styrene-co-dodecyl methacrylate- co-octadecyl methacrylate) (PSAMA) in lubricating mineral oil are examined. Additives show complementary effect in which OCP increases solution viscosity while PSAMA increases viscosity index and lowers pour point. Repulsive interactions of OCP/PSAMA in oil solutions were determined by Krigbaum–Wall and Catsiff–Hewett models. Calculations employing the group contribution approach of Coleman, Graf and Painter confirmed immiscibility (Λ12 > 0, ΔGM > 0) of OCP/PSAMA blends. The obtained results give the prospects for lubricant formulations with mixed polymeric additives as well as for lubricant handling in order to avoid separation of copolymers in solution. © 2017 The Korean Society of Industrial and Engineering Chemistry

Izvorni jezik
Engleski

Znanstvena područja
Kemija, Kemijsko inženjerstvo, Temeljne tehničke znanosti

Napomena
Glavni autori:
Fabio Faraguna i Ante Jukić

POVEZANOST RADA