Abstract
Lubrication properties of eight water-soluble polymers were studied by measuring the static friction coefficients μs of thin liquid films of these polymer solutions between glass surfaces. Thin liquid films of polymer solutions definitely enhance lubricity even at Cp=0.01 g/100 ml and reduce the μs values of glass-water-glass interfaces to the extent of 20 to 30%, depending on their chemical structures. Above a concentration of 0.2 g/100 ml, μs becomes constant. Vinylic polymers usually have higher μs than polysaccharides and their derivatives.
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