本研究探討不同陽離子型光起始劑、組成與紫外光照射時間等對alicyclic diepoxy樹脂硬化後之光穿透率之影響。期間利用傅立葉轉換紅外線光譜儀(FTIR)分析其轉化率尋找加工硬化條件,藉由紫外光/可見光譜儀量測穿透率,並以熱分析儀:DSC與TGA測試其熱性質異。結果發現使用5wt% UVI 6992之起始劑,硬化後薄膜光穿透率範圍較廣,於波長470nm時,穿透率可達90%以上,添加1.5wt%之抗氧化劑對其光穿透率範圍並無顯著影響。另一方面,使用UVI 6976起始劑硬化後之薄膜,波長需達670nm以上,穿透率方可達80%,但是可以添加抗氧化劑提高其透明度,值得再加以詳細研究探討其中原因。本研究部分成果可以作為光電元件高透明度封裝材料之基本配方。
Alicyclic diepoxy resin was cured with different initiators, UVI 6992 and 6976, under UV radiation. The conversion and thermal properties of the cured films were investigated by a FTIR, DSC, and TGA. The transmission of the epoxy film was measured by a UV/VIS spectrometer. It was found that when the epoxy resin cured with the initiator, UVI 6992, the transmission is larger than 90% after wave length of 470 nm, and it is not changed apparently with addition of an antioxidant. On the other hand, with UVI 6976, the transmission of the cured film is lower, which is about 80% after wave length of 670nm, but increases by adding the antioxidant. The cause is worthy of further study. The results can be extended to develop the encapsulate materials of photo-electro devices.