The Study on Synthesis and Kinetics of UV Curing Type Waterborne Polyurethane Acrylate Dendrimer

• Main Authors: Che-Meng Su, 蘇哲盟
• Other Authors: Syang-Peng Rwei
• Format: Others
• Language: zh-TW
• Published: 2011
• Online Access: http://ndltd.ncl.edu.tw/handle/4yu63w

碩士 === 國立臺北科技大學 === 有機高分子研究所 === 99 === The polymer used in this study is PU-acrylate dendrimer with a highly-branched spherical 3D structure as its core and different numbers of functional groups. It contains two systems: HMDI and HDI system; with five, nine and thirteen functional groups respectively. In the course of the reaction, the resin was characterized by Fourier Transform Infrared Spectroscopy (FTIR), H-NMR and MALDI-TOF respectively. The resin was added into the solution with different concentration of Photoinitiator (DC-1773) and exposed to UV-light at different temperature, i.e. 20, 40, 60 and 80 °C, respectively in order to explore the effects of UV-curing kinetic and conversion. The major test equipment used in this experiment is DPA (Double Beam Photocalorimetric Accessory). From the results of the experiment, we discovered that the conversion, reaction rate and reaction order all increased before the concentration of Photoinitiator reached to the optimal level. After reaching the certain optimal concentration, the conversion, reaction rate and reaction order all decreased presumably due to the rapid recombination of numerous free radicals. Similarly, the conversion, reaction rate and reaction order also increased with the increasing reaction temperature.