Journal
JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY
Volume 53, Issue 2, Pages 434-440Publisher
SPRINGER
DOI: 10.1007/s10971-009-2117-9
Keywords
Photopolymerization; Polysiloxanes; Refractive index; Thermal properties; Transparency
Categories
Funding
- Korea government [R11-2007-045-03002-0, R01-2007-000-20815-0]
- National Research Foundation of Korea [R01-2007-000-20815-0, 2007-0056055, R11-2007-045-03002-0] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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Methacrylate oligosiloxane-based hybrid materials (methacrylate hybrimers) were fabricated by curing the methacrylate oligosiloxane resins synthesized by sol-gel condensation reaction of 3-(trimethoxysilyl)propyl methacrylate (MPTS) and diphenylsilanediol (DPSD) for the LED encapsulant application. The fabricated hybrimers are optically transparent and have a high refractive index up to 1.565 depending on the precursor composition. The lower DPSD content hybrimer, which is the more polymerized and heated in a vacuum to remove the non-polymerized methacrylate groups, produces higher optical transmittance and thermal stability. This behavior is interpreted by thermal degradation of methacylate groups in the hybrimers.
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