Synthesis diblock copolymer and it’s application
Date Issued
2005
Date
2005
Author(s)
Ko, Yu-Sheng
DOI
en-US
Abstract
In this thesis, we prepared the amide link of polyethylene glycol methyl ether and 2-bromoisobutyryl bromide as the marcoinitiator. We used ATRP method to prepare amphiphilic diblock copolmers with narrow polydispersity. The hydrophilic end of these amphilic block copolymers is polyethylene glycol methyl ether, and the hydrophobic end of these amphilic block copolymers is methyl acrylate. We used EOm-MAn as templates to synthesize porous silica materials under acid aqueous condition. As the hydrophobic end (MA) increases, we can observe the pore size also increasing. When the templates were EO45-MA28, EO45-MA63,EO114-MA113, the cubic and 2-d hexagonal structures, were successfully made.
Moreover, we modified the organic function 3-azido-propylamine on the hydrophobic end, and using the different reaction time to control the modification amount. Using the organic function grafted the Palladium and Tungsten complex on the diblock polymers. Similarly sol-gel process to prepare mesoporous silicas with metal included, which were subjected for catalysis.Suzuki coupling and olefin oxidation by Pd and W respectively, show good activities. For recycle purpose, the catalyst remains activity after 5 run. The metal leach from the porous material was very less in the Tungsten material case.
Subjects
diblock copolymer
Type
thesis
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