Acrylic pressure sensitive adhesives (PSAs) were prepared by UV polymerization under varying curing conditions of both fast and slow curing, employing high- and low-intensity UV radiation, respectively. The influences of curing conditions and isobornyl acrylate (IBOA) content on PSA performance were comprehensively investigated by measurement of their rheological, thermal, and adhesive properties. In particular, rheological characterization was accomplished by several analytical methods, such as in situ UV rheology, frequency sweep, stress relaxation, and temperature ramp tests, to understand the effect of the UV curing process and IBOA content on the viscoelastic behavior of acrylic PSAs. The slow-cured samples were observed to form more tightly crosslinked networks compared to the fast-cured. On the other hand, at high loading levels of IBOA, in the case of slow curing, the sample exhibited a contrasting trend, having the shortest stress relaxation time and the highest energy dissipation; this was due to molecular chain scission occurring in the crosslinked polymer during UV polymerization. Consequently, we successfully demonstrated the influence of monomer composition of acrylic PSAs, and that of curing conditions employed in UV polymerization. This study provides valuable insights for the development of crosslinked polymer networks of acrylic PSAs for flexible display applications.

丙烯酸压敏粘合剂（PSA）是通过紫外线聚合在不同的快速和慢速固化条件下制备的，分别采用高强度和低强度紫外线辐射。通过测量其流变性能、热性能和粘合性能，综合研究了固化条件和丙烯酸异冰片酯（IBOA）含量对压敏胶性能的影响。特别是，通过原位紫外流变学、频率扫描、应力松弛和升温测试等多种分析方法完成流变表征，以了解紫外固化过程和 IBOA 含量对丙烯酸压敏胶粘弹性行为的影响。观察到与快速固化的样品相比，缓慢固化的样品形成更紧密的交联网络。另一方面，在IBOA的高负载水平下，在缓慢固化的情况下，样品表现出相反的趋势，具有最短的应力松弛时间和最高的能量耗散；这是由于在紫外线聚合过程中交联聚合物中发生分子链断裂。因此，我们成功证明了丙烯酸压敏胶单体组成的影响以及紫外线聚合中采用的固化条件的影响。这项研究为开发用于柔性显示器应用的丙烯酸压敏胶交联聚合物网络提供了宝贵的见解。