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Viscosity behavior of maleic anhydride and long-chain alkyl methacrylate copolymers in mineral oil solutions

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Chemistry and Technology of Fuels and Oils Aims and scope

The viscosity behavior of diluted, semidiluted and concentrated solutions of maleic anhydride (MA), dodecyl methacrylate (DDMA), and octadecyl methacrylate (ODMA) terpolymers in mineral oil was investigated. Terpolymers with MA molar ratio of 5 and 10% were synthesized by free radical polymerization in mineral base oil. All the terpolymer solutions in base oil exhibited high kinematic viscosity and values of viscosity index (> 140), proving very high thickening efficiency. Increasing the MA content in terpolymer decreases solution viscosity. Viscosity-concentration dependences of dilute solutions at 40 and 70°C were described by Huggins’ equation, and intermolecular interaction were discussed. In comparison with conventional polymeric viscosity index improvers based on the pure alkyl methacrylates, copolymers of long-chain alkyl methacrylates with small amounts of MA show improved shear and thermal stabilities.

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Authors and Affiliations

  1. Faculty of Chemical Engineering and Technology, University of Zagreb, Maruli c’ev trg 19, P.O. Box 177, HR-10000, Zagreb, Croatia

    Zvonimir Janovic’, Ante Jukic’ & Elvira Vidovic’

Authors
  1. Zvonimir Janovic’
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  2. Ante Jukic’
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  3. Elvira Vidovic’
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Published in revised form in Khimiya i Tekhnologiya Topliv i Masel, No.4, pp. 33 – 37, July – August, 2009.

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Janovic’, Z., Jukic’, A. & Vidovic’, E. Viscosity behavior of maleic anhydride and long-chain alkyl methacrylate copolymers in mineral oil solutions. Chem Technol Fuels Oils 45, 267–275 (2009). https://doi.org/10.1007/s10553-009-0144-4

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  • DOI: https://doi.org/10.1007/s10553-009-0144-4

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