高分子分散液晶(PDLC)其高對比度低及驅動電壓的特性，使其有許多產品的應用，也是新世代智慧櫥窗的重要的材料。在本實驗中，我們使用2-PEA和TPGDA兩個壓克力單體來製備高分子分散液晶。並比較各式製備條件，探討其結構特性對於高分子分散液晶的光學現象的影響 。找出較低驅動電壓和高對比度的高分子分散液晶。並且加入二色性染料使其成為Dye-dope PDLC，經由偏光顯微鏡觀察發現若直接加入染料會使二色性染料溢出至PDLC薄膜外部，降低PDLC的對比度，因此我們將PDLC中之液晶及染料以THF溶劑洗去再重新加入含染料之液晶，成功的解決染料溢出的問題且發現能有效的提高PDLC對比度。

Polymer-dispersed liquid crystal (PDLC), with characteristics of high contrast and low driving voltage, has found many product applications and is an important material for new generations. In this experiment, we used 2-Phenoxy ethyl acrylate (2-PEA) and Tripropxlene Glycol Diacrylate (TPGDA), two acrylic monomers, to prepare PDLC, and we compared various preparation conditions in order to investigate the impact of structural properties on the optical behavior of PDLC. While maintaining the low driving voltage and high contrast of a PDLC, a dichroic dye was added to turn the device into a dye-doped PDLC. Using polarized light microscopye, it was observed that direct injection of the dye resulted in overflow of the dichroic dye into the outside of the thin film, reducing the contrast of the PDLC. Therefore, we utilized tetrahydrofuran (THF) solvent to wash away the liquid crystal (LC) from the PDLC, followed by re-addition of the dye-containing LC. This successfully solved the dye overflow problem and was found to enhance the PDLC contrast effectively.

[1] 陳品誠，” 非刷磨式奈米配向技術發展”工業材料雜誌 190, 133 (2002)。
[2] J. Van Haaren,” Wiping out dirty displays” Nature 411, 29 (2001).
[3] 李政道，” 液晶配向技術研究動向”工業材料雜誌 188, 149 (2002)。
[4] 陳秋雲譯，e世代液晶顯示器，全華科技股份有限公司，第五章，(2001)
[5] 劉品均等，” 電漿束液晶配向技術”工業材料雜誌 210, 154 (2004)。
[6] 陳嘉明等，” 光配向技術”工業材料雜誌 210, 202 (2004)。
[7] 陳連春譯，最新液晶應用技術，建興出版社，第一章，(2007)
[8] 吳仲文，” 離子束配向技術”工業材料雜誌 210, 207 (2004)。
[9] N. A. Vaz, G. W. Smith and P. S. Drzaic, J “Polymer dispersed nematic liquid crystal for large area displays and light valves” Appl. Phys. 60, 2142 (1986).
[10] J. W. Doane, N. A. Vaz, B. G. Wu and S. Zumer, ” Field controlled light scattering from nematic microdroplets” , Appl. Phys. Lett. 48, 269 (1986).
[11] N. A. Vaz, G. W. Smith and G. P. Montgomery, Jr. “A Light Control Film Composed of Liquid Crystal Droplets Dispersed in an Epoxy Matrix ”, Mol. Cryst. Liq. Cryst. 146, 17 (1987).
[12] G. P. Montgomery and N. A. Vaz, “Refractive indices of polymer‐dispersed liquid‐crystal film materials: Epoxy‐based systems ” Appl. Opt. 26, 738 (1987).
[13] F.Reinitzr, Wiener Monatscher, "Beitrage zur Kenntnis des Cholesterins" Fur Chem., Vol.4, p.462(1888).
[14] Peter J. Collings, Liquid Crystal, Natur’s Delicate Phase of Matter, Princeton University Press, Oxford(1993).
[15] B. Bahadur, Liquid Crystal Application and Use, Vol. 1, World Scientific Singpore(1990).
[16] 劉鳳岐、湯心頤編著，高分子物理，高等教育出版社 (1995)
[17] 周其鳳、王新久著，液晶高分子，科學出版社 (1999)。
[18] R. A. Weiss and C. K. Ober, Liquid-Crystalline Polymers American Chemical Society, Washington DC, (1990).
[19] G. Friedel, “ The Mesomorphic States of Matter” Ann. Physik. 18, 273 (1922).
[20] B. Bahadur, Liquid Crystal: Applications and Uses, World Scientific, Singapore (1990).
[21] G. Friedel, “THE MESOMORPHIC STATES OF MATTER” Ann. Physique , 17, 273 (1922)
[22] S. Chandrasekhar, B. K. Sadashiva and K. A. Suresh, “ Liquid crystals of disc-like molecules” Pramana 9, 471 (1977).
[23] P. S. Drzaic, “Liquid Crystal Dispersions” , World Scientific, Singapore, (1995).
[24] S. Chandrasekhar, B. K. Sadashiva and K. A. Suresh “Short range orientational order in nematic liquid” , Pramana 9, 471 (1977).
[25] I. C. Khoo, S. T. Wu, Optics and Nonlinear Optics of Liquid Crystals, World Scientific, Singapore, (1993).
[26] P. J. Collings, Liquid Crystals: Nature's Delicate Phase of Matter, Princeton University Press, New Jersey, (1990).
[27] W. Doane, A. Golemme, J. L. West, “Polymer Dispersed Liquid Crystals for Display Applications ”, Mol. Cryst Liq Cryst 165, 511 (1988).
[28] S. J. Kłosowicz and M. Aleksander, “Effect of polymer-dispersed liquid crystals morphology on its optical performance” Opto-Electron. Rev. 12, 305 (2004).
[29] 何曼君、董西峽、陳維孝編著，高分子物理，復旦大學出版社 (1990)。
[30] 劉鳳岐、湯心頤編著，高分子物理，高等教育出版社 (1995)。
[31] O. Lehmann “Ueber kunstliche Farbung von Krystallen und amorphen Korpern”. Ann. Physik. 25, 852 (1908).
[32] 楊怡寬、郭蘭生、鄭殷立編譯，液晶化學及物理入門，偉明圖書有限公司,(2001)
[33] 劉瑞祥譯，液晶之基礎與應用，國立編譯館出版,(1996)。
[34] P. G. Gennes and J. prost, The Physics of Liquid crystals, Clarendon Press, Oxford (1993).
[35] P. J. Collings, Liquid Crystals: Nature's Delicate Phase of Matter, Princeton University Press, New Jersey, (1990).
[36] J. Ma, L. Shi, and D. K. Yang“Bistable Polymer Stabilized Cholesteric Texture Light Shutter” Appl. Phys. Express 3, 021702:1−3 (2010).
[37] Deeleep K. Rout and Sukhmal C. Jain, “ Refractive Index and Microscopic Studies of Polymer Dispersed Liquid Crystal Films Containing Low Concentration of Liquid Crystals ” J. Appl. Phys. 30 1412-141 4(1991)
[38] P. J. Collings, Michael Hird, Introduction to Liquid Crystals Chemistry and Physics, Taylor & Francis, London, (1996).
[39] 松本正一，角田市良 合著，劉瑞祥 譯，液晶之基礎與應用，復文書局(2001).
[40] 劉瑞祥譯，液晶之基礎與應用，國立編譯館出版 (1996)。
[41] F. Reinitzer, “Beitrage zur Kenntnis des Cholesterins”, Ann. Physik. 27, 213 (1908).
[42] C. W. Oseen, “The theory of liquid crystals” Trans. Faraday Soc. 29, 883-899 (1933).
[43] H. Zocher, Trans. Faraday Soc. 29, 945 (1933).
[44] F. C. Frank, “ On the theory of liquid crystalsDisc”. Faraday Soc. 25, 19-28 (1958).
[45] N. A. Vaz, G. W. Smith, G. P. Montgomery Jr., “ A Light Control Film Composed of Liquid Crystal Droplets Dispersed in an Epoxy Matrix ” Mol. Cryst. Liq. Cryst., 146, 17. (1987).
[46] N. A. Vaz, G. P. Montgomery Jr., “Refractive indices of polymer‐dispersed liquid‐crystal film materials: Epoxy‐based systems ” J. Appl. Phys. 62, 3161. (1987).
[47] Kim, E., Woo, J., Kim, B., “Morphology and switching of holographic gratings containing an azo dye” Liquid Crystals, Vol.34, pp79-85(2007)
[48] Sukhmal C. J., Ravindra S.T., “Thermo-electro-optic switch based on polymer dispersed liquid crystal composite” J. Appl. Phys., Vol.61, pp1641-1642(1992).
[49] Sukhmal C. J., Ravindra S.T., Lakshmikumar, S.T., “Switching response of a polymer dispersed liquid‐crystal composite” J. Appl. Phys., Vol.73, pp3744-3748(1993)
[50] Stanislaw. J. Klosowicz and Jozef. Zmija., “Attempt to Apply Liquid-Crystal Thermography in Prick Test Allergy Diagnosis” Mol. Cryst. Liq. Cryst.,249,163(1994)
[51] Y aroshchuk,O.V.,Dolgov,L.O.,“Polymethacryloylaryl methacrylates: New concept of photoalignment materials for liquid crystals ” Optical Matericals, Vol.2pp1097-1102(2007).
[52] Kim, E., Woo, J., Kim, B., “Morphology and switching of holographic gratings containing an azo dye,” Liquid Crystals, Vol.34, pp79-85(2007)
[53] F. P. Nicoletta, G. De Filpo, J. Lanzo, and G. Chidichimo., “A method to produce reverse-mode polymer-dispersed liquid-crystal shutters” Appl. Phys. Lett., 74, 3945 (1999).
[54] G.H. Heilmeier and L.A. Zanoni, “ Guest-host interactions in nematic liquid crystals. A new electro-optic effect ” Appl.Phys.Lett., 13, 91(1968).