標題: | Novel Siloxane-Modified Epoxy Resins as Promising Encapsulant for LEDs |
作者: | Lin, Chih-Hao Whang, Wha-Tzong Chen, Chun-Hua Huang, Shu-Chen Chen, Kai-Chi 材料科學與工程學系 Department of Materials Science and Engineering |
關鍵字: | siloxane-modified epoxy;crosslinking density;sulfurization resistance;surface mounted device LEDs;encapsulant |
公開日期: | 1-一月-2020 |
摘要: | This study investigated a new category of transparent encapsulant materials for light-emitting diodes (LEDs). It comprised a phenyl group that contained siloxane-modified epoxy (SEP-Ph) hybridized with a cyclic tetrafunctional siloxane-modified epoxy (SEP-D4) with methylhexahydrophthalic anhydride (MHHPA) as a curing agent. The SEP-Ph/SEP-D4 = 0.5/0.5 (sample 3) and SEP-D4 (sample 4) could provide notably high optical transmittance (over 90% in the visible region), high-temperature discoloration resistance, low stress, and more crucially, noteworthy sulfurization resistance. The lumen flux retention of the SEP encapsulated surface mounted device LEDs remained between approximately 97% and 99% after a sulfurization test for 240 h. The obtained comprehensive optical, mechanical, and sulfurization resistance proved the validity and uniqueness of the present design concept with complementary physical and chemical characteristics. |
URI: | http://dx.doi.org/10.3390/polym12010021 http://hdl.handle.net/11536/154188 |
DOI: | 10.3390/polym12010021 |
期刊: | POLYMERS |
Volume: | 12 |
Issue: | 1 |
起始頁: | 0 |
結束頁: | 0 |
顯示於類別: | 期刊論文 |