Heat resistance, impact strength, and transparency of PET copolymer containing fluorenylidene bis(2-phenoxyethanol)

Jeong, Seung Ho; Yoon, Kwan Han; Min, Byung Gil; Lee, Young Sil; Lee, Sang Pal; Park, Sang Bong

doi:10.1007/s12221-017-7143-6

Cited by 5 publications

(3 citation statements)

References 27 publications

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“…Transparent flexible substrates have major constraints that limit the flexibility and processability of flexible electrodes. Although polyethylene terephthalate (PET) and polyethylene naphthalate (PEN) are widely used, their durability hinders the development of highly flexible transparent electrodes and device fabrication processes at temperatures above the glass-transition temperatures ( T g ). ,, In our preliminary investigation, Norland Optical Adhesive 63 (NOA63, Norland Products, Inc.) and colorless polyimide (CPI) were noted for their high durability, transparency, and processability. ,, It is easy to control the thicknesses of both of these polymers via spin-coating, and both are fairly durable, enabling moderately-high-temperature fabrication processes. , In particular, owing to its shape memory characteristics, NOA63 is more suitable for high-temperature processes and mechanical deformation than PET and PEN when deformed at T > T g and at a low bending radius ( r < 1.2 mm) . However, in the case of solution processes, NOA63 becomes inadequate because its properties are plasticized by water …”

Section: Introductionmentioning

confidence: 99%

“…Although polyethylene terephthalate (PET) and polyethylene naphthalate (PEN) are widely used, their durability hinders the development of highly flexible transparent electrodes and device fabrication processes at temperatures above the glasstransition temperatures (T g ). 3,32,34 In our preliminary investigation, Norland Optical Adhesive 63 (NOA63, Norland Products, Inc.) and colorless polyimide (CPI) were noted for their high durability, transparency, and processability. 3,7,35 It is easy to control the thicknesses of both of these polymers via spin-coating, and both are fairly durable, enabling moderatelyhigh-temperature fabrication processes.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Highly Durable and Flexible Transparent Electrode for Flexible Optoelectronic Applications

Jin¹,

Lee²,

Yeom

et al. 2018

ACS Appl. Mater. Interfaces

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A highly-durable, highly-flexible transparent electrode (FTE) is developed by applying a composite made of a thin metal grid and a doped conducting polymer onto a colorless polyimide-coated NOA63 substrate. The proposed FTE exhibits a transparency of 90.7% at 550 nm including the substrate and a sheet resistance of 30.3 Ω/sq and can withstand both moderately high-temperature annealing (∼180 °C) and acidic solution (70 °C, pH 0.3) processes without performance degradation. The fabricated FTE yielded good mechanical stability under 10 000 cycles of bending deformations at a bending radius less than 1 mm without degradation of electrical conductivity. The high durability of the proposed FTE allows for the fabrication of flexible energy harvesting devices requiring harsh conditions, such as highly flexible perovskite solar cells (FPSCs) with a steady-state power conversion efficiency (PCE) of 12.7%. Notably, 93% of the original PCE is maintained after 2000 bending cycles at an extremely small bending radius of 1.5 mm. The FPSCs installed on curved surfaces of commercial devices drive them under various environments. The applicability of the proposed FTE is further confirmed via the fabrication of a flexible perovskite light-emitting diode. The proposed FTE demonstrates great potential for applications in the field of flexible optoelectronic devices.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Highly Durable and Flexible Transparent Electrode for Flexible Optoelectronic Applications

Jin¹,

Lee²,

Yeom

et al. 2018

ACS Appl. Mater. Interfaces

View full text Add to dashboard Cite

show abstract

“…This high temperature exceeds the heat deflection temperature (HDT) of polymeric substrates, leading to thermal distortion of the substrate and subsequently reducing transmittance and flexibility. For instance, the HDT of polyethylene terephthalate (PET) is approximately 65 ℃ 19 , 20 .…”

Section: Introductionmentioning

confidence: 99%

Fast, facile and thermal damage free nanowelding of Ag nanowire for flexible transparent conductive film by pressure-assisted microwave irradiation

Jeong,

Sohn,

Bang

et al. 2023

Sci Rep

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A fast and straightforward fabrication process for producing a robust, flexible, and transparent conductive film was demonstrated using nanowelding of Ag nanowires through pressure-assisted microwave irradiation. This innovative process effectively reduces the sheet resistance of the Ag nanowire transparent conductive film without causing any thermal distortion to the PET substrate. The microwave irradiation induces nanowelding between Ag nanowires, leading to a decrease in sheet resistance by forming nanowelding junctions. This selective heating of Ag nanowires further enhances the reduction in sheet resistance. Additionally, the application of pressure-assisted microwave irradiation allows the Ag nanowires to be embedded into the PET substrate, resulting in the formation of a robust film capable of withstanding cycling bending stress. The pressure-assisted microwave irradiation process proves to be a strong fabrication method for creating Ag nanowire transparent conductive films, especially when dealing with thermally weak substrate materials.

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Bio‐Based Copolyester PEIFT: Enhanced Hydrophilicity, Rigidity, and Applications in Nanofibers

Wang,

Pu,

et al. 2024

Macromol. Rapid Commun.

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The raw materials of Poly(ethylene terephthalate) (PET) are derived from petroleum‐based resources, which are no sustainable. Therefore, previous researchers introduced biomass‐derived 2,5‐tetrahydrofurfuryl dimethanol (THFDM) into PET. However, its heat resistance has decreased compared to PET. In this paper, a novel bio‐based copolyester, poly(ethylene glycol‐co‐2,5‐tetrahydrofuran dimethanol‐co‐isosorbide terephthalate) (PEIFT), is prepared by introducing biomass‐derived isosorbide (ISB) and THFDM into the PET chains through melting copolymerization process. With the introduction of ISB content, copolyesters' hydrophilicity and rigidity improve. Compared to PET, glass transition temperature (Tg) increases by over 5 °C. In addition, the toughness and spinning performance of PEIFT have also been improved as a result of the addition of THFDM components. The hydrophobicity of PEIFTs electrospinning is greatly improved, with a contact angle exceeding 135 °. Finally, due to the good hydrophobicity of PEIFTs nanofibers, they have potential application value in the manufacture of hydrophobic nanofiber and filter films. Given its biomass source and excellent performance, they make it easier to replace materials derived from petroleum.This article is protected by copyright. All rights reserved

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Heat resistance, impact strength, and transparency of PET copolymer containing fluorenylidene bis(2-phenoxyethanol)

Cited by 5 publications

References 27 publications

Highly Durable and Flexible Transparent Electrode for Flexible Optoelectronic Applications

Highly Durable and Flexible Transparent Electrode for Flexible Optoelectronic Applications

Fast, facile and thermal damage free nanowelding of Ag nanowire for flexible transparent conductive film by pressure-assisted microwave irradiation

Bio‐Based Copolyester PEIFT: Enhanced Hydrophilicity, Rigidity, and Applications in Nanofibers

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