Abstract
The viscoelastic behavior of the pressure-sensitive adhesives used in the polarizing films was studied by thermo-mechanical(TMA) and dynamic mechanical analyses. The viscoelastic properties were found to be related to the elastic recovery after compression, tendency for adhesive to ooze out from the edges during the slitting process, and self-peeling tendency of the polarizing film. Dynamic mechanical analyses were found to be sensitive enough to serve as a means to compare the performance of adhesives for quality control purpose. The creep test using the compression mode of TMA showed the relative contribution of the viscous and elastic component from the total recovery of adhesives. Storage modulus difference between the value measured at the lowest frequency and that at the highest frequency was related to tendency for adhesive to ooze out during slitting. Peel-off tendency was related to the time to show the sudden decrease in the storage modulus for adhesives.
