• Title/Summary/Keyword: oligosiloxane

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Preparation of Silicon-Based Hybrid Gels with POSS Additives and Their Application to LED Encapsulants (POSS계 첨가제를 가지는 실리콘 젤의 제조와 LED 봉지재 응용)

  • Eun, Hee-Chun;Im, Hee-Eun;Lee, Yun Sang;Kwark, Young-Je
    • Polymer(Korea)
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    • v.39 no.2
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    • pp.311-316
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    • 2015
  • Densely structured polyhedral oligomeric silsesquioxane (POSS) was employed as an additive to enhance hardness of silicon-based hybrid gels for LED encapsulants. To improve the miscibility of POSS and polysiloxane resin, alkyl or oligosiloxane branches were introduced to POSS moiety. Platinum-catalyzed hydrosilylation reactions were used to attach branches of 1-decanol, 9-decen-1-ol, and vinyl-terminated oligosiloxane to the POSS molecules. Alkyl-branched POSSs (decyl-POSS and decenyl-POSS) were immiscibile with polysiloxane resin and generated gels with low transparency and low hardness values. On the other hand, oligosiloxane-branched POSS (Siloxy-POSS) showed good miscibility with polysiloxane resin to give gels with high transparency. However, the prepared gels did not show noticeable improvement in hardness compared to the gels without the POSS additive.

Transparent Sol-Gel Hybrid Dielectric Material Coatings for Low k Passivation Layer

  • Yang, Seung-Cheol;Oh, Ji-Hoon;Kwak, Seung-Yeon;Bae, Byeong-Soo
    • 한국정보디스플레이학회:학술대회논문집
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    • 2009.10a
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    • pp.1453-1456
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    • 2009
  • Transparent sol-gel hybrid dielectric material (hybrimer) coating films were fabricated by spin coating and photo or thermal curing of sol-gel derived oligosiloxane resins. Hybrimer coating films are suitable as the passivation layer of TFT in AMLCD due to low dielectric constant, small loss tangent, low leakage current density, high transmittance and thermal stability.

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