Preparation and Characterization of Organoclays Based on Dendrons, and Their Self-Assembly Behavior for Electro-Optics

• Main Authors: Tain-Hao Wu, 吳天豪
• Other Authors: 鄭如忠
• Format: Others
• Language: zh-TW
• Published: 2010
• Online Access: http://ndltd.ncl.edu.tw/handle/48819586059242030264

碩士 === 國立中興大學 === 化學工程學系所 === 98 === In this study, a bifunctional building block compound,IPDA was used as a building block to synthesize a series of novel polyurethane/malonamide dendrons with azobenzene dyes (disperse red 1, DR1) in the exterior via a convergent route. All of the dendrons (G1, Mw = 1192 ; G2, Mw = 2948 ; G3, Mw = 6459) exhibited structural characteristics with secondary amines located on one end. With this feature, the amine salt was easily formed by the addition of hydrochloric acid. Subsequently, the amine salt proceeded to ion-exchange with Na+-MMT. By respective incorporation of the different generations of dendrons onto layered MMT, the interlayer distance of the intercalated hybrid could be precisely controlled to form a unique structure with the possibility of self-assembly. Chromophore-containing dendrons (G1、G2 and G3) were utilized to intercalate layered silicates, resulting in a large d-spacings of different generations organoclays are 52Å, 133Å, and 85Å, respectively. After blending the organoclays with a high glass transition temperature polyimide (271 oC), respectively, the interactions between the hydrogen bond-rich dendrons and polyimide in the layered confinement resulted in ordered morphology, i.e. optical nonlinearity.