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Volume :30 Issue : 2 2003
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The behavior of poly (n-decyl methacrylate) in homologous series of n-alkanes: A method for prediction of its application as viscosity index improver in motor oils and its miscibility with polymethylene
Auther : S. AQEEL, D. LATH AND E. LATHOVA
Polymer Institute, Slovak Academy of Sciences, 842 36 Bratislava, Slovak Republic
ABSTRACT
Dilute solutions of poly (n-decyl methacrylate) in homologous series of n-alkanes have been studied. The measurements of viscosity-temperature dependence of poly(n-decyl methacrylate) in n-alkanes (as a model solvent for paraffinic lils) were applied for model calculation of the specific viscosity as a function of temperature and molecular weight. Exchange parameters of poly(n-decyl methacrylate) in n-alkanes have been determined according to Flory’s theory and were applied to predict the mixing of polymethylene with poly(n-decyl methacrylate). The positive energy of mixing signifies mutual incompatibility of these polymers.
Keywords: dilute solution properties; miscibility of blends; poly(n-decyl methacrylate); viscosity index improver.