That is because i'm doing a project regarding tackiness, but i don't have access to tackiness meter to measure tack. But i can measure viscosity using Mooney visco meter(or reographic data).I like know any linear relationship between tackiness(adhesion) and Viscosity of rubber compounds.
Generally, there is no direct relationship of Mooney viscosity with tackiness. Loosely, Mooney viscosity depends on the molecular weight and molecular weight distribution of the polymer. With broader molecular weight distribution of polymer, Mooney viscosity is showing a lower value except some rubber like NR (broader molecular weight distribution, but higher Mooney Viscosity), Nd-BR (Very narrow molecular weight distribution, but low Mooney viscosity). Broad molecular weight distributed polymer may give better tack. However, as tack is a surface phenomenon, it is affected by many parameters like, testing environment, temperature, humidity etc.
So, it is not correct to correlate the tack with Mooney Viscosity.
i found in practice in rubber industry, to increase tackiness dropping down viscosity is done. Is there any evidence on that? reference may be? Thank you