Bis(4-methacryloylthiophenyl) sulfide is a sulfur-rich difunctional methacrylate engineered for high-refractive-index (RI ≥ 1.65 @ 589 nm, 25 °C) UV/LED-curable optical systems.
Key Optical & Physical Data:
Refractive index (n<sub><sup>): 1.650 – 1.655 (lit. 1.652)
Abbe number (ν<sub>): 27 ± 1
Density: 1.26 ± 0.1 g cm⁻³ (20 °C)
Melting point: 64 °C (low-melt, suitable for precision moulding)
Viscosity (80 °C): 30 – 40 mPa·s (easy vacuum casting)
Volume shrinkage on cure: < 2 % (density dilatometry)
Glass-transition temperature (DSC, 2 % TPO): 135 °C
