Transparent, thermally stable methyl siloxane hybrid materials using sol-gel synthesized vinyl-methyl oligosiloxane resin

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Vinyl-methyl oligosiloxane resin was synthesized by a hydrolytic sol-gel reaction of vinyltriethoxysilane and dimethyldiethoxysilane. Hydrochloric acid was added as a catalyst to promote the hydrolysis of silane monomers to form a highly condensed siloxane resin (Condensation degree = 95 %). The vinyl-methyl oligosiloxane and hydrogen-methyl oligosiloxane resin was then cured by a thermal hydrosilylation reaction with a minimal platinum catalyst content (3 ppm). The increased cross-linking density improved the thermal decomposition temperature and lowered the weight loss at a high temperature. The fabricated methyl-siloxane hybrid material (hybrimer) shows superior thermal stability (decomposition temperature > 530 A degrees C), good long-term thermal resistance (300 A degrees C, 20 h) and transparency (92 % at 450 nm, 83 % at 350 nm) in the visible and ultraviolet ranges. Based on these characteristics, the methyl-siloxane hybrimer can be applied to various applications, including thermally stable optical materials. [GRAPHICS] .
Publisher
SPRINGER
Issue Date
2017-04
Language
English
Article Type
Article
Keywords

UV LED ENCAPSULANT; HYDROSILATION; TECHNOLOGY; COMPLEXES; OLEFINS

Citation

JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY, v.82, no.1, pp.253 - 260

ISSN
0928-0707
DOI
10.1007/s10971-016-4262-2
URI
http://hdl.handle.net/10203/223781
Appears in Collection
MS-Journal Papers(저널논문)
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