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Abstract

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.

Keywords

Polyamide dendron poly(4-vinylpyridine)multiple hydrogen bonding

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

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