| Summary: | 碩士 === 國立中正大學 === 化學工程所 === 95 === The aim of this work is to prepare a star polystyrene containing gold nanoparticles,(PS)star -AuNPs,via anionic polymerization.The synthesis uses the arm-first method that controls the number of arms of (PS)star by varying the molar ratio of DVB to n-BuLi.Afterwards,we functionalize the living (PS)star by ethylene sulfide(ES).The resulting star polystyrene with thiol terminal groups.(PS)star-SH was then mixed with HAuCl4•3H2O in THF solvent in the presence of the reducing agent, super hydride. Upon the reduction of Au+ to Au atoms, the thiol groups of the polymer molecules were bonded onto the gold surface and a polymeric nanocomposite with well-distribution nanogold particles was thus formed. Compared with the linear counterpart,(PS)linear-AuNP, (PS)star-AuNPs has a better size distribution of gold nanoparticles and prevent more effectively the aggregation of gold nanoparticles. 1H-NMR、13C-NMR、TEM、XPS、TGA、DSC and UV-VIS have bene used to investigate the physical properties of the nanocomposite material.
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