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Utilizing acrylic pressure sensitive adhesives(PSAs) in flexible displays involves attachment to each layered device.Due to the high demands of flexible displays in industry,acrylic PSAs must have high flexibility.For the reasons,the acrylic PSAs used in this study were designed to confirm the influence of the crosslinking density on their adhesion properties and flexibility.The characteristics,molecular weight and glass transition temperature were measured by GPC and DSC.The gel fraction was investigated to identify the crosslinking density of the acrylic PSAs.The adhesion performances,which included the peel strength,probe tack and lap shear test,were measured by texture analyzer.The flexibility of crosslinked acrylic PSAs was evaluated by stress relaxation and the creep test using DMA.In adhesion performances,the peel strength and probe tack were decreased as the crosslinking agent increased.The maximum stress from lap shear increased when the crosslinking agent was introduced but the maximum stress and shear strain decreased as a function of the crosslinking agent.The stress relaxation results,showed that the stress at specific strain levels increased as the crosslinking agents increased.The creep results,show that the strain was inversely proportional to the elastic recovery.The data indicate that the crosslinking structure can improve the attributes of PSAs related to flexible display applications.