Effect of Silicone-modified Microsilica Content on Electrical and Mechanical Properties of Cycloaliphatic Epoxy/Microsilica System

Park, Jae‐Jun; Yoon, Chan-Young; Lee, Jae-Young; Cheong, Jong-Hoon; Kang, Geun-Bae

doi:10.4313/teem.2016.17.3.155

Cited by 4 publications

(1 citation statement)

References 6 publications

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“…Epoxy resins have typically been used as packaging materials owing to their characteristics of excellent sealing, high insulation resistance, and good mechanical properties. However, with the increase of LED device power, the respective shortcomings of epoxy resins such as low thermal stability against yellowing were revealed gradually, which is unable to meet the requirement of the high‐power white LED encapsulants . Owing to the high transmittance as well as excellent thermal resistance, silicone resins have currently been considered to be an outstanding packaging material.…”

Section: Introductionmentioning

confidence: 99%

High refractive index adamantane‐based silicone resins for the encapsulation of light‐emitting diodes

Lin

Feng

Sun

et al. 2018

Polymers for Advanced Techs

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The encapsulation of high power light emitting diode (LED) needs the silicone resins to have relative high refractive index and thermal-aging properties. Herein, high refractive index adamantane-based phenyl epoxy-silicone (APES) resins for LED encapsulation were synthesized by the sol-gel condensation of 1-adamantane methanol propyltrimethoxysilane-3-urethane, γ-(2,3-epoxypropoxy)propytrimethoxysilane and diphenylsilanediol. These adamantane-based silicone resins have multifunctional groups including adamantyl group, phenyl group, and epoxy group in order to meet the various requirements for LED encapsulation. Importantly, the adamantane group in the silicone resins benefits for high refractive index and anti-thermal properties.These APES resins were characterized by proton nuclear magnetic resonance and Fourier transform infrared spectroscopy. When APES resins were cured by methylhexahydrophthalic anhydride, they showed relatively high refractive index of 1.56, high hardness, and high thermal resistance. The encapsulated LED demonstrated high adhesion properties by red-ink tests. These merits make adamantane-based silicone resins promising candidates as LED encapsulation materials.

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Section: Introductionmentioning

confidence: 99%

High refractive index adamantane‐based silicone resins for the encapsulation of light‐emitting diodes

Lin

Feng

Sun

et al. 2018

Polymers for Advanced Techs

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Preparation and properties of a fast‐cross‐linking α‐cyanoacryloyloxyethyloxypropyl‐functionalized polydimethylsiloxane

et al. 2022

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α-cyanoacryloyloxyethyloxypropyl-functionalized polysiloxanes were prepared using a condensation reaction between the adduct of anthracene/α-cyanoacryloyl chloride and hydroxyethyloxypropyl-modified polydimethylsiloxanes, followed by a retro-Diels-Alder reaction to deprotect the anthracene. Structures of the obtained polymers and their intermediates were characterized using 1 H NMR, 13 C NMR, and FT-IR spectroscopies. Under mild conditions such as at room temperature with a relative humidity of 60%, the α-cyanoacryloyloxyethyloxypropyl-functionalized polysiloxanes could be completely cured within 3 minutes. With a small amount of N,Ndimethyl-p-toluidine as the initiator, the curing time could be further shortened to 3-5 seconds. Various factors affected on the cross-linking density and the average molecular weight between two adjacent cross-linking points were investigated. The results indicated that with the introduction of the α-cyanoacryloyloxyethyloxypropyl group, α-cyanoacryloyloxyethyloxypropylfunctionalized PDMS exhibited much better thermal stabilities than that of pure poly(ethyl α-cyanoacrylate). Besides, the introduction of an αcyanoacryloyloxyethyloxypropyl group in the PDMS molecule also eliminated the crystallization behavior and glass transition temperature of PDMS. The results of the water contact angle test showed the interfacial characteristics of the prepared material changed significantly relative to pure PDMS. With the increase in the content of the functional group, the water contact angle of the material showed an overall increasing trend.

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Effect of silicone resin modification on the performance of epoxy materials for LED encapsulation

Wen

Huo

et al. 2017

J Mater Sci: Mater Electron

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Effect of Silicone-modified Microsilica Content on Electrical and Mechanical Properties of Cycloaliphatic Epoxy/Microsilica System

Cited by 4 publications

References 6 publications

High refractive index adamantane‐based silicone resins for the encapsulation of light‐emitting diodes

High refractive index adamantane‐based silicone resins for the encapsulation of light‐emitting diodes

Preparation and properties of a fast‐cross‐linking α‐cyanoacryloyloxyethyloxypropyl‐functionalized polydimethylsiloxane

Effect of silicone resin modification on the performance of epoxy materials for LED encapsulation

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