Abstract
PETTA/PETTG optical resin, a kind of LED encapsulating resin with high refractive index, was prepared via click chemistry method in this study. Optical and thermal properties of this resin were investigated with UV–Vis scanning spectrophotometer, Abbe refractometer and thermogravimetric analyses (TGA), respectively. The results show that the light transmitance of this resin can arrive up to 93% and its refractive index is 1.556, which is higher than those of silicone resins. Meanwhile, the cured PETTA/PETTG resin demonstrates the equal thermal stability to silicone resins, and its 5% weight loss temperature was about 350 °C. Therefore, the cured PETTA/PETTG resin could be used as an alternate of expensive silicone resins in LED encapsulation.
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