Optimization of Recovery and Relaxation of Acrylic Pressure-Sensitive Adhesives by Using UV Patterning for Flexible Displays

• DOI: 10.1021/acs.iecr.8b05208
• Publication Date: 2019-02-12T14:02:42Z
• Authors: Jong-Ho Back; Dooyoung Baek; Kyeng-Bo Sim; Gyu-Young Oh; Seong-Wook Jang; Hyun-Joong Kim; Youngdo Kim
• Keywords: Stress relaxation; Pressure sensitive; Elasticity; Strain (injury)

For flexible displays, recovery and relaxation of acrylic pressure-sensitive adhesives (PSA) must be enhanced; however, only a few studies have focused on their optimization. High cross-linking density the PSA leads to improved but deteriorates stress relaxation; thus, it is difficult perform optimization by simply controlling density. Herein, was determined that UV-patterned with both high low densities in single layer enables relaxation. By introducing PSA, elasticity largely deteriorated significantly improved, compared nonpatterned this effect enhanced increases applied strain. Thereby, were well-optimized values above 71% at 300% The had, respectively, positive negative correlation storage modulus.