An improved method of determining the viscosity of optical adhesives
Jela Galoviæ, MSc (Eng)
A method for determining the viscosity of adhesives used for bonding optical elements (hereafter called: optical adhesives) is presented in this paper. The Mitchel viscometer, which has been specially designed and made for the measurement of viscosity of adhesives, is used. The used appliance is brand new. The constant of viscometer (the constant of small ball) with the liquid of known viscosity-referential sample, has been determined. The oils of different viscosities, marked from RU-I to RU-VII, have been used as samples. Viscosities of the referential samples, used for this testing, have been previously specified according to the ANSI/ASTM D 445.
Key words: polymers, adhesives, optical adhesives, viscosity, viscosity measurement, testing method.