53‐1: The foldable display architecture technique depending on the wide temperature range and the folding curvature

Jang, Se-Jin; Hwang, Byoung-Har; Kwak, Tae-hyoung; Kim, Jeom‐Jae; Yoon, Soo‐Young

doi:10.1002/sdtp.15583

Cited by 6 publications

(2 citation statements)

References 15 publications

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“…Under operational conditions, flexible devices endure continuous cyclical deformations and dynamic transformations, placing PSAs at the forefront of ensuring product reliability and longevity. As the bonding agents for all film layers in these devices, PSAs not only undergo repeated large deformations at specific frequencies but also face constant exposure to ambient vibrations and temperature fluctuations 14 .…”

Section: Theorymentioning

confidence: 99%

Effect of Temperature and Humidity on Mechanical Properties and Constitutive Modeling of Pressure- Sensitive Adhesives

Luo,

Chen,

Liu

et al. 2024

Preprint

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Pressure-sensitive adhesives (PSAs) are crucial for the structural and functional integrity of flexible devices. This study conducts systematic mechanical tests, including uniaxial tensile, compression, planar shear, and stress relaxation, on PSAs at temperatures ranging from − 25℃ to 85℃ and relative humidity levels from 0–90%. The Ogden model effectively describes the hyperelastic behavior of PSAs under large deformations, as indicated by an R-Square value above 0.97. The results show that temperature markedly affects PSA properties, particularly near the glass transition temperature (Tg), with lower temperatures leading to decreased elasticity and higher temperatures aiding in stress relaxation. Similarly, humidity impacts PSA behavior, increasing elasticity and decreasing stiffness, especially noticeable in stress relaxation tests. These findings highlight the substantial influence of environmental conditions on the material properties of PSAs and underscore the necessity of understanding both hyperelastic and viscoelastic responses for their application in flexible technologies. This research provides critical insights for the optimal utilization of PSAs in the rapidly evolving field of flexible electronics, including OLED displays.

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Section: Theorymentioning

confidence: 99%

Effect of Temperature and Humidity on Mechanical Properties and Constitutive Modeling of Pressure- Sensitive Adhesives

Luo,

Chen,

Liu

et al. 2024

Preprint

View full text Add to dashboard Cite

show abstract

“…These mechanical properties are notably influenced by environmental factors, such as temperature and moisture, which are critical for flexible displays 13 . Flexible displays undergo constant cyclic deformations and dynamic transformations during operation, and are subjected to temperature fluctuations 14 . As the bonding agents for all film layers in display modules, the PSA requires high adhesion properties to resist the dynamic force.…”

Section: Theorymentioning

confidence: 99%

Effect of temperature and humidity on mechanical properties and constitutive modeling of pressure-sensitive adhesives

Luo,

Chen,

Liu

et al. 2024

Sci Rep

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Pressure-sensitive adhesives (PSAs) are crucial for the structural and functional integrity of flexible displays. Investigating the intricate mechanical properties of PSAs can help enhance product quality and performance. This study conducts systematic mechanical tests, including uniaxial tensile, compression, planar shear, and stress relaxation, on PSAs at temperatures ranging from – 25 to 85 ℃ and relative humidity levels from 0 to 90%. Our findings reveal that the Anssari-Benam model accurately describes the hyperelastic behavior of PSA materials under large deformation, outperforming the Ogden model by requiring fewer parameters and better preserving convexity. Moreover the results show that temperature markedly affects PSA properties, particularly near the glass transition temperature (Tg), with lower temperatures leading to decreased elasticity and higher temperatures aiding in stress relaxation. Similarly, humidity impacts PSA behavior, increasing elasticity and decreasing stiffness, especially noticeable in stress relaxation tests. These findings highlight the substantial influence of environmental conditions on the material properties of PSAs and underscore the necessity of understanding both hyperelastic and viscoelastic responses for their application in flexible technologies. This research provides critical insights for the optimal utilization of PSAs in the rapidly evolving field of flexible electronics, including OLED displays.

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Biomass‐Derived Optically Clear Adhesives for Foldable Displays

Park,

Kim,

Ahn

et al. 2024

ChemSusChem

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Acrylic pressure sensitive adhesives (PSAs) are the most widely used and play a crucial role in ensuring the stable operation of foldable displays. With a focus on product sustainability, numerous studies have aimed to enhance eco‐friendliness of acrylic PSAs. However, few studies specifically address the development of environmentally friendly acrylic PSAs for foldable devices. In this work, we synthesized new monomers by modifying citronellol, a terpenoid, for use as functional monomers and low glass transition temperature (Tg) monomers in acrylic optical clear adhesives (OCAs). We prepared OCAs using these monomers via an environmentally friendly visible‐light‐driven polymerization process due to its greater energy efficiency and reduced harm to humans, as opposed to the ultraviolet light that is normally used in conventional photopolymerization processes. Their properties were confirmed through rheological analysis. The resultant OCAs exhibit low Tg, appropriate storage modulus across a wide temperature range, reliable adhesion force to various substrates, and decent creep and recovery properties. These characteristics indicate their potential to enhance the eco‐friendliness of foldable devices.

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53‐1: The foldable display architecture technique depending on the wide temperature range and the folding curvature

Cited by 6 publications

References 15 publications

Effect of Temperature and Humidity on Mechanical Properties and Constitutive Modeling of Pressure- Sensitive Adhesives

Effect of Temperature and Humidity on Mechanical Properties and Constitutive Modeling of Pressure- Sensitive Adhesives

Effect of temperature and humidity on mechanical properties and constitutive modeling of pressure-sensitive adhesives

Biomass‐Derived Optically Clear Adhesives for Foldable Displays

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