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Synthesis of Polyamide Dendrimers bearing Multiple Hydrogen Bonding Parts on the Periphery
Department of Organic and Polymeric materials, Tokyo Institute of Technology, Tokyo, Japan
Department of Organic and Polymeric materials, Tokyo Institute of Technology, Tokyo, Japan mkakimot{at}o.cc.titech.ac.jp
Department of Material-process Engineering & Applied Chemistry for Environments Akita University, Akita, Japan A series of polyamide dendrimers (GO-G2) having carboxy1 groups on the periphery were prepared by the divergent method. The reaction of G 18NH2 dendrimer with glutaric acid anhydride gave polyamide dendrimer (Gi-8COOH). The structure of polyamide dendrimers were confirmed by IR, 1H, 13C NMR, MALDI-TOF mass, and elemental analysis. Poly(4-vinylpyridine) (P4VP) was prepared by atom transfer radical polymerization of 4-vinylpyridine. A hydrogen bonded GI-8COOH/P4VP 1/8 (molar ratio) complex was prepared by mixing GIA8COOH with P4VP in methanol, followed by removing the solvent. IR spectrum of Gl-8COOH/P4VP 1/8 complex showed the characteristic absorptions at 2550 and 1950 cm-1 due to the hydrogen bonding. A glass transition temperature (Tg) of GI-8COOH/P4VP 1/8 complex was observed at 177°C by DSC measurement, whereas the Tg values of G 1-8COOH and P4VP were at 147 and 138°C, respectively.
Key Words: Polyamide dendrimer poly(4-vinylpyridine) multiple hydrogen bonding
High Performance Polymers, Vol. 16, No. 4,
611-624 (2004) |
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