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High Performance Polymers
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Preparation and Properties of Polyamide Dendrons-Poly(4-Vinylpyridine) Complexes via Multiple Hydrogen Bonding

Mitsutoshi Jikei

Department of Material-process Engineering & Applied Chemistry for Environments, Akita University, 1-1 Tegata Gakuen-machi, Akita-shi, Akita 010-8502, Japan, mjikei{at}ipc.akita-u.ac.jp

Takayuki Kouketsu

Department of Organic and Polymeric Materials, Tokyo Institute of Technology, International Research Center of Macromolecular Science, 2-12-1 O-okayama, Meguro-ku, Tokyo 152-8550, Japan

Masa-Aki Kakimoto

Department of Organic and Polymeric Materials, Tokyo Institute of Technology, International Research Center of Macromolecular Science, 2-12-1 O-okayama, Meguro-ku, Tokyo 152-8550, Japan

Yuji Yamane

Department of Chemistry and Materials Science, Tokyo Institute of Technology, International Research Center of Macromolecular Science, 2-12-1 O-okayama, Meguro-ku, Tokyo 152-8550, Japan

Isao Ando

Department of Chemistry and Materials Science, Tokyo Institute of Technology, International Research Center of Macromolecular Science, 2-12-1 O-okayama, Meguro-ku, Tokyo 152-8550, Japan

The preparation and properties of the multiple hydrogen-bonded complexes between polyamide dendrons and poly(4-vinylpyridine) (P4VP) are described. Polyamide dendrons with or without carboxyl groups were prepared as components for the complex with P4VP. A hydrogen-bonded G1-GA (polyamide dendron having five carboxyl groups)/P4VP 1/5 (molar ratio) complex was prepared by mixing G1-GA with P4VP in methanol, followed by removing the solvent. The formation of the hydrogen bond was confirmed by IR measurements. A glass transition temperature (T g) of the complex was observed at 179'C by DSC measurement, whereas the melting point of G1-GA (156'C) and T g of P4VP (144'C) disappeared. The T g of G1-GA/P4VP complexes was dependent on the molar ratio ([Acceptor]/[Donor]). The maximum T g at 184'C was observed in the acceptor-rich region. 1H NMR spin-lattice relaxation time (T 1) and diffusion coefficient (D) were measured to evaluate the mobility of G1-GA or P4VP in solution. Both T 1 and D values suggest that the mobility of the dendron and P4VP in the complex is restricted by the formation of multiple hydrogen bondings in solution.

Key Words: Polyamide dendron • poly(4-vinylpyridine) • multiple hydrogen bonding

This version was published on August 1, 2006

High Performance Polymers, Vol. 18, No. 4, 421-436 (2006)
DOI: 10.1177/0954008306064473
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