The Relationship between Optical Properties and Molecular Characteristicsof Polyurethane-Acrylic Pressure-Sensitive Adhesives

Polyurethane-acrylic hybrid pressure-sensitive adhesives (PSAs) are of interest due to the possibilityof taking advantage of the unique characteristics of both polymers. Since the optical properties of thePSAs used in some applications are of importance, in this research, the optical properties of the pureacrylic and the hybrid PSAs were studied, and the relationship between the changes in theseproperties and the molecular characteristics of the copolymers, such as gel content and molecularweight, with the changes in the formulations was investigated. All PSAs cast on polyethyleneterephthalate backing had a transparency even higher than the backing. Moreover, not only does gelcontent directly affect the haze of the PSA, but even at lower gel contents, the higher the chainsmolecular weight and dispersity, the higher the haze.

کلیدواژه ها:

Adhesive ، Hybrid Polymer ، Polyurethane ، Acrylic ، Silane ، Gel Content ، OpticalProperties