Fast Curable Polysiloxane-Silphenylene Hybrimer with High Transparency and Refractive Index for Optical Applications

Area of Science:

• Materials Science
• Polymer Chemistry
• Optoelectronics

Background:

• Polysiloxane-silphenylene hybrimers (PSH) are advanced materials with tunable properties.
• Investigating novel synthesis routes for enhanced performance is crucial for material development.

Purpose of the Study:

• To synthesize a fast-curable PSH with superior optical and thermal properties.
• To evaluate the refractive index and transmittance of the synthesized PSH.
• To assess the material's stability under thermal stress.

Main Methods:

• Nonhydrolytic sol-gel condensation of phenyl-vinyl-oligosiloxane (PVO) and tris(dimethylhydrosilyl)benzene (TDMSB) using a Pt catalyst.
• Characterization of optical properties (refractive index, transmittance) at various wavelengths.
• Thermal aging tests at 180 °C for 72 hours to evaluate stability.

Main Results:

• Successfully synthesized a PSH with a rapid curing time of 30 minutes.
• Achieved a high refractive index (1.60 at 450 nm) and high optical transmittance (97% at 450 nm).
• Demonstrated excellent thermal stability, with only a 0.5% decrease in transmittance after aging at 180 °C for 72 hours.

Conclusions:

• The PSH exhibits excellent optical properties and remarkable thermal stability.
• The developed material is a promising candidate for applications requiring high transparency and durability.
• Fast curing time offers processing advantages for industrial applications.