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Optimization of Recovery and Relaxation of Acrylic Pressure-Sensitive Adhesives by Using UV Patterning for Flexible Displays
Industrial & Engineering Chemistry Research ( IF 3.8 ) Pub Date : 2019-02-28 , DOI: 10.1021/acs.iecr.8b05208 Jong-Ho Back 1 , Dooyoung Baek 1, 2 , Kyeng-Bo Sim 1 , Gyu-Young Oh 1 , Seong-Wook Jang 1, 2 , Hyun-Joong Kim 1, 2 , Youngdo Kim 3
Industrial & Engineering Chemistry Research ( IF 3.8 ) Pub Date : 2019-02-28 , DOI: 10.1021/acs.iecr.8b05208 Jong-Ho Back 1 , Dooyoung Baek 1, 2 , Kyeng-Bo Sim 1 , Gyu-Young Oh 1 , Seong-Wook Jang 1, 2 , Hyun-Joong Kim 1, 2 , Youngdo Kim 3
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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 of the PSA leads to improved recovery but deteriorates the stress relaxation; thus, it is difficult to perform optimization by simply controlling the cross-linking density. Herein, it was determined that a UV-patterned PSA with both high and low cross-linking densities in a single layer enables the optimization of both recovery and relaxation. By introducing the UV-patterned PSA, the elasticity and recovery largely deteriorated but the stress relaxation was significantly improved, compared to that of the nonpatterned PSA, and this effect was enhanced with increases in the applied strain. Thereby, the recovery and relaxation were well-optimized with both values above 71% only at 300% strain. The recovery and relaxation of PSA had, respectively, a positive and negative correlation with the storage modulus.
中文翻译：
通过用于柔性显示器的UV图案优化丙烯酸压敏胶的恢复和松弛
对于柔性显示器，必须提高丙烯酸压敏胶粘剂（PSA）的恢复性和松弛性；但是，只有很少的研究集中在其优化上。PSA的高交联密度可提高回收率，但会降低应力松弛。因此，难以通过简单地控制交联密度来执行优化。在此，确定了在单层中具有高和低交联密度的UV图案化的PSA能够使恢复和松弛均优化。与未图案化的PSA相比，通过引入UV图案的PSA，其弹性和恢复能力大大降低，但是应力松弛得到了显着改善，并且随着施加的应变的增加，这种效果得到了增强。从而，只有在300％应变时，恢复和松弛才达到最佳，两个值均高于71％。PSA的恢复和松弛与储能模量分别具有正相关和负相关。
更新日期：2019-02-28
中文翻译：
通过用于柔性显示器的UV图案优化丙烯酸压敏胶的恢复和松弛
对于柔性显示器，必须提高丙烯酸压敏胶粘剂（PSA）的恢复性和松弛性；但是，只有很少的研究集中在其优化上。PSA的高交联密度可提高回收率，但会降低应力松弛。因此，难以通过简单地控制交联密度来执行优化。在此，确定了在单层中具有高和低交联密度的UV图案化的PSA能够使恢复和松弛均优化。与未图案化的PSA相比，通过引入UV图案的PSA，其弹性和恢复能力大大降低，但是应力松弛得到了显着改善，并且随着施加的应变的增加，这种效果得到了增强。从而，只有在300％应变时，恢复和松弛才达到最佳，两个值均高于71％。PSA的恢复和松弛与储能模量分别具有正相关和负相关。
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