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High Performance Polymers
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Synthesis and Characterization of Polyamidoamine-Based Liquid Crystalline Dendrimers

Kazuhiro Suzuki

Osamu Haba

Department of Human Sensing and Functional Sensor Engineering, Graduate School of Engineering, Yamagata University, Yonezawa, Yamagata 992, Japan

Ritsuko Nagahata

Department of Polymer Chemistry, National Institute of Materials and Chemical Research, 1-1 Higashi, Tsukuba, Ibaraki 305, Japan

Koichiro Yonetake

Department of Human Sensing and Functional Sensor Engineering, Graduate School of Engineering, Yamagata University, Yonezawa, Yamagata 992, Japan

Mitsuru Ueda

Department of Human Sensing and Functional Sensor Engineering, Graduate School of Engineering, Yamagata University, Yonezawa, Yamagata 992, Japan

Poly(amidoamine)-based liquid crystalline dendrimers (LCDs) with mesogenes on the surface were successfully prepared by the reaction of poly(amidoamine) dendrimers with 40-cyanobiphenyl hydrogen glutarate in the presence of a condensing agent, diphenyl(2,3- dihydro-2-thioxo-3-benzoxazolyl)phosphonate. The structures of LCDs were characterized by IR, 1H-NMR and MALDI-TOF mass spectroscopy and elemental analysis. These LCDs did not show a thermotropic liquid crystalline nature but exhibited a lyotropic liquid crystalline property in the 80 wt% DMF solutions of LCDs containing lithium bromide.

High Performance Polymers, Vol. 10, No. 3, 231-240 (1998)
DOI: 10.1088/0954-0083/10/3/002
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