The impact of polymer molecular architecture on lubrication efficacy in non-aqueous media
To relate the lubrication efficacy of oil-soluble copolymers to their molecular architectures, it is necessary to correlate their self-assembly in a hydrocarbon solvent with their interfacial structure and behaviour under shear on a polar substrate. In collaboration with Infineum (a world-leading engine-oil additive company), we propose a small-angle neutron scattering (SANS) study of self-assembly of novel polymethacrylate (PMA) block copolymers as a function of concentration and temperature. Preliminary SANS result from a diblock polymer architecture has revealed a core-shell micelle structure in a model oil (deuterated n-dodecane). Here different polymer architectures will be investigated (multiblock, diblock, random, and homo). The results will complement our ongoing interfacial structure and friction/lubrication studies using synchrotron x-ray reflectivity (XRR) and the surface force apparatus (SFA), respectively, in order to correlate their bulk structures with their surface adsorption behaviour; critically important to their use in Infineum formulation. Such fundamental studies will assist rational design of future polymeric friction-modifying additives.
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BRISCOE WUGE H; CATTOZ Beatrice; CUBITT Robert; DOWDING Peter; EASTOE Julian; Charlotte Kenton; MATSARSKAIA Olga; MOODY Georgina; SCHWEINS Ralf and STEVENS Michael. (2020). The impact of polymer molecular architecture on lubrication efficacy in non-aqueous media. Institut Laue-Langevin (ILL) doi:10.5291/ILL-DATA.9-10-1639
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