Variation of Adhesion Properties with Molecular Weight of Cured and Non-Cured Acrylic PSAs

摘要

Peel strength decreases with increasing molecular weight. For peel strength, this observation is due to decreasing wettability of adhesive and high molecular weight sample lowers the wettability of adhesive, probably due to the influence of entanglement as the entangled polymer chain does not flow effectively to produce good wettability on the substrate. Probe tack shows no change with increasing molecular weight. But, tack of cured PSAs was increased slightly. It is attributed to interaction of polymer chain from cross linking and entanglement.