Synthesis and Properties of Polymers via ATRP from a Pyridine-containing Star Initiator

• Main Authors: Xu-Cheng Kuo, 郭昫成
• Other Authors: 汪昆立
• Format: Others
• Language: zh-TW
• Published: 2008
• Online Access: http://ndltd.ncl.edu.tw/handle/8hzp39

碩士 === 國立臺北科技大學 === 化學工程研究所 === 96 === A star initiator containing two amide bromides and one ester bromide units was synthesized and used in ATRP polymerization. Four monomers including one hydrophilic monomer - potassium 3-sulfopropyl methacrylate (SPMA) and two hydrophobic monomers - methyl methacrylate (MMA), styrene, were used in the ATRP polymerization. Amphiplilic polymers were prepared from the hydrophilic and hydrophobic monomers. The structures of the initiator and prepared polymers were confirmed by IR and NMR. The polydispersity indexs (PDIs) of prepared polymers were below 1.4 and the experimental results showed the polymerizations by the initiator were living polymerizations. The PMMA polymer was synthesized by ATRP polymerization, and analyzed by UV spectra. This compound absorbed at 294 nm and 328 nm, the absorption changed to 306 nm and 382 nm after protic acid was added. The protonated polymer possessed strong fluorescence (around 500 nm) after protic acid was added as excited at 382 nm. The fluorescent intensity at 500 nm increased as acid concentration. Amphiphilic block copolymers of poly(MMA-b-SPMA) were prepared and confirmed by NMR. The amphiphilic block polymer aggregated to form particles (0.25~10 μm) in different solvents measured by DLS. The shape of particles had pillar, round-shaped flat, non-regularity flat, tree-shape, grapes, sphere to be measured by SEM on the glass.