研究生: |
李家豪 Gi-Hou Lee |
---|---|
論文名稱: |
環氧壓克力系樹脂光硬化行為與光學性質之研究 The Influence of Curing Behaviors and Optical Performance on Epoxy Acrylic Photo-Cruing Resin |
指導教授: |
邱顯堂
Hsien-Tang Chiu |
口試委員: |
李俊毅
Jiunn-Yih Lee 邱士軒 Shih-Hsuan Chiu 鄭國彬 K. B. Cheng |
學位類別: |
碩士 Master |
系所名稱: |
工程學院 - 材料科學與工程系 Department of Materials Science and Engineering |
論文出版年: | 2005 |
畢業學年度: | 93 |
語文別: | 中文 |
論文頁數: | 106 |
中文關鍵詞: | 光穿透率 、可視角 、霧度 、光硬化 、壓克力 、超音波 、光澤度 |
外文關鍵詞: | transmittance, acrylic, Haze, visual angle, Photo curing, ultrasonic, degree of luster |
相關次數: | 點閱:378 下載:0 |
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本研究旨在探討利用高透明性環氧壓克力光硬化性樹脂(Difunctional epoxy acrylate oligomer;M-6210)、光起始劑(2-Benzyl-2-dimethylamino-1-(4-morpholinophenyl)-butanone-1;I-369)、反應性稀釋劑(Tripropylene Glycol Diacrylate,產品型號:TPGDA)所形成的最適配比作為樹脂基材,並加入微粒子之光學改質劑,探討不同形態之微粒子含量及種類之超音波分散性及光學特性,首先以剛性擺錘振動減衰儀(Rigid body Pendulum Rheometer Tester;RPT)探討光硬化性樹脂最適配比後,取適當比例分別添加PMMA、PS、SiO2、TiO2微粒子以RPT行光硬化行為測定,再以超音波分散儀加工搭配四種微粒子,利用微粒子折射率的差異性與多層間的搭配,經由光學儀器量測出霧度、可視角、光澤度、光穿透率…等光學性質以探討其對光學膜的影響效應。
實驗結果發現,微粒子在純水中較易於分散,在非離子界面活性劑之水浴中則因被疏水基團包覆而易於團聚(Agglomeration),當添加在高黏度樹脂時,則微粒子分散後受黏度之牽制作用而不易團聚。PMMA、SiO2、PS微粒子由於透光性高,所以微粒子添加量對於光硬化速率無影響,而片狀之TiO2由於吸光性較大,故在TiO2添加量為50%時經由剛性擺錘振動減衰儀之測試須長達六小時才完成硬化。另一方面由於PS微粒子會吸收溶劑,導致在PS添加量為50wt%時,其網目被撐開而令網目密度較為稀疏。
在光學性質量測由於PMMA粒子與樹脂同屬壓克力系,故光散射效果為最差,致使最終霧度值較低,霧度值隨光學膜層厚度增加而增加,光穿透率隨光學膜內微粒子含量愈高而降低,尤其以TiO2光學膜最為明顯,在可視角量測方面則以TiO2微粒子含量愈高或層數愈多所得值愈高,光澤度以有規則微粒子所形成的PMMA膜與PS膜所得值較佳。
The purpose of this research is to determine which is the most suitable base material for resins by examining several substances like the highly transparent difunctional epoxy acrylate oligomer; M-6210), 2 – Benzyl – 2 – dimethylamino – 1 - (4-morpholinophenyl) – butanone - 1; I-369), Tripropylene Glycol Diacrylate (product model: TPGDA). In addition, we shall attempt to bring in optically transformed particles and discuss the content and classification of their various forms, as well as their ultrasonic wave dispersion and optical properties. We proceed by subjecting the substances to a Rigid Body Pendulum Rheometer Tester or RPT in order to determine which is the most suitable for the epoxy acrylate oligomer. Afterwards, we begin to distinguish the appropriate ratio of PMMA, PS, SiO2, TiO2 particles by identifying their solidifying conduct through the RPT. Four types of processed particles were dispersed by means of the ultrasonic waves while using variations of particle refractive indices and multi-level groups. Haze, visual angle, degree of luster, transmittance, and other optical properties were measured via optics instruments so as to analyze the influences and effects of focused optic membranes.
The experiment results showed that the particles easily dispersed in pure water. On the other hand in a non-ionic surface with active agents, the water bath activity manifested swift agglomeration as a result of sparse water groups and bases. When incorporated in a high viscosity resin, particles began to disperse while resisting the viscosity of the fluid and thus, making it difficult to agglomerate. Due to the high diaphaneity of PMMA, SiO2, and PS particles, the addition of particles did not pose any effect on the light hardening speed. In another experiment, 50% of TiO2 was added in, the greater ability of TiO2 sheets to absorb light caused it to harden only after 6 hours of RPT. On the other hand, since PS particles are able to absorb solvents, the mesh density became a bit more dispersed when the mesh was propped open and after 50wt% of PS was added in.
In measuring optic properties, since PMMA particles and resin have similar acrylic fiber, the light scattering effects will be most unfavorable causing a low final fog value. Fog value rises when the thickness level of the optic membrane increases, and goes down when the transparency rate of the inner particles of the optic membrane increases. This is especially evident in TiO2 particles when the visual angle is being measured; when the number of particles and the number of layers are higher, the values obtained from the PMMA and PS membranes formed by the particles are more favorable by virtue of the luster principle.
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