Synthesis and Photochromic Behavior of Azobenzene-based PMMA Copolymer in Solution and Thin Film

• Main Authors: Wang Pung Kai, 王鵬凱
• Other Authors: Sung-Nung Lee
• Format: Others
• Language: en_US
• Published: 2002
• Online Access: http://ndltd.ncl.edu.tw/handle/51933223841794334602

碩士 === 輔仁大學 === 化學系 === 90 === The photochrome of azobenzene dye will induce trans-cis photoisomerization under ultra-visible light﹒The reverse reaction will be reverse by heat or light with different wavelength；Moreover , there are three properties : 1. Good arrangement of polymer , 2. Good solvation , 3. Good process to be drived easily , which can be applied in storage material of light in this kind of copolymer﹒Therefore , it is quite potential and valuable to do further research﹒ This research is to synthesize monomer with azobenzene and copolymerize with methyl methacrylate (MMA)﹒Then the copolymer will become side-chain copolymer﹒The optical property of this copolymer is worthy of research﹒In this study, the azobenzene moiety was attached with the same electron-withdrawing group and the same spacer length(n=11)﹒Further , we synthesize azobenzene and copolymerize with different mole percentage of MMA to induce copolymerizing reaction﹒The copolymer we get after reaction will be discussed individually in the following two situations:1. Solvent polarity；2. Thin film and studied it`s phenomenon of photochrome﹒I would suggest that each kind of phenomenons in the copolymer are affected by different solvent polarity and their application in the storage material of light in practice﹒The study result shows that photochrome wil isomerizes faster with higher mole percentage of azobenzene in the copolymer﹒However, the rate of isomerization will be faster with higher solvent polarity due to more attractions﹒