教師資料查詢 | 類別: 會議論文 | 教師: 黃招財 CHAO-TSAI HUANG (瀏覽個人網頁)

標題:The Influence of Polymer Viscoelasticity on the Optical Features during an Optical Lens Development
學年104
學期2
發表日期2016/07/25
作品名稱The Influence of Polymer Viscoelasticity on the Optical Features during an Optical Lens Development
作品名稱(其他語言)
著者Gwo-Geng Lin; Der-Lung Lai; Chao-Tsai (C.T.) Huang; Jye Wang, and Yuan-Jung Chang, and Rong-Yeu Chang
作品所屬單位
出版者
會議名稱32th Annual Meeting of Polymer Processing Society(PPS-32)
會議地點Lyon, France
摘要In modern life, polymeric optical lens has been utilized in many electronic devices, such as camera, mobile phone, tablet, and so on. Although hundred million lenses are produced annually for those devices, the quality is the key to the main suppliers. Indeed, the optical quality is affected by both the geometric features and the optical birefringence. However, how the material’s viscoelasticity influences the optical features is still not fully understood yet. In this study, we have systematically investigated the viscoelastic effects on the optical property of a lens made of Zeonex COP 480R material by the traditional injection molding, simulated with n = 0.4 and * = 217,000 Pa in the Cross model. We assumed that the rheological parameters can be modified artificially based on the White-Metzner model of viscoelasticity, in which the viscosity was of the Cross-type model. Results show that if the power-law index (n) was changed from 0.1 to 0.6, the total fringed order has no significant difference, but the fringed patterns was varying dominantly in the perpendicular direction, instead of the flow direction. This situation was matched with the distribution of the flow-induced residual stresses. Moreover, if the * in the Cross model was varied from 100,000 Pa to 300,000 Pa, the total fringed patterns were apparently changing from being dominated in the flow direction to being in the direction perpendicular to the flow. The influenced width of the fringed patterns was almost linearly increased with the increasing *. Moreover, to discover viscoelastic effect on the optical property using modified White-Metzner model, when material has larger relaxation time, it will cause stronger birefringence effect in both the flow and the perpendicular directions. The results can be applied as some guideline for either the further material modifications or the new material developments.
關鍵字viscoelasticity;optical birefringence;Cross model;White-Metzner model
語言英文
收錄於
會議性質國際
校內研討會地點
研討會時間20160725~20160729
通訊作者
國別法國
公開徵稿
出版型式
出處PPS-32 Proceeding
相關連結
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