1：Experimental Design and Method Selection:

The study involved designing POSS derivatives with dual functional groups (fluoroalkyl and acrylate ester) to enhance miscibility and properties in PMMA. Syntheses were based on established sol-gel methods, and characterization included NMR, MS, SEM, UV-vis, refractive index measurements, DMA, DSC, and TGA.

2：Sample Selection and Data Sources:

PMMA (Mw = 800,000) was used as the polymer matrix. POSS fillers (F+MMA, F+CP, F+C18) were synthesized and mixed with PMMA in chloroform solutions.

3：List of Experimental Equipment and Materials:

Equipment included JEOL EX-400 NMR spectrometer, Thermo Fisher Scientific EXACTIVE mass spectrometer, JEOL JSM-5600 SEM, SHIMADZU UV-3600 spectrophotometer, Abbe refractometer DR-M4, Seiko Instrument SDM5600/DMS210 DMA, SII DSC 6220, and EXSTAR TG/DTA 6220 TGA. Materials included trimethoxy(3,3,3-trifluoropropyl)silane, 3-(trichlorosilyl)propyl methacrylate, trichlorocyclopentylsilane, trichloro(octadecyl)silane, sodium hydroxide, PMMA, THF, triethylamine, and chloroform.

4：Experimental Procedures and Operational Workflow:

POSS derivatives were synthesized via hydrolysis and condensation reactions. PMMA composites were prepared by mixing POSS and PMMA in chloroform, casting into films, and drying. Measurements were performed on the films for transparency, refractive index, thermal stability, and mechanical properties.

5：Data Analysis Methods:

Refractive indices were analyzed using the Lorentz-Lorenz and Vuks equations. Thermal and mechanical data were analyzed from TGA, DSC, and DMA curves.