Poly(propyleneimine) dendrimers peripherally modified with mesogens

被引：81
|
作者：
Yonetake, K [1 ]
Masuko, T
Morishita, T
Suzuki, K
Ueda, M
Nagahata, R
机构：
[1] Yamagata Univ, Dept Mat Sci & Engn, Fac Engn, Yamagata 9928510, Japan
[2] Yamagata Univ, Dept Human Sensing & Funct Sensor Engn, Grad Sch Engn, Yamagata 9928510, Japan
[3] Natl Inst Mat & Chem Res, Dept Polymer Chem, Tsukuba, Ibaraki 305, Japan
来源：
MACROMOLECULES | 1999年 / 32卷 / 20期
关键词：
D O I：
10.1021/ma990107a
中图分类号：
O63 [高分子化学（高聚物）];
学科分类号：
070305 ; 080501 ; 081704 ;
摘要：
Poly(propyLeneimine)-based Liquid crystalline dendrimers (PPILCDs) with a relatively flexible dendritic scaffold were successfully prepared by the Michael addition reaction of poly(propyleneimine)s with omega-(4'-cyanobiphenyloxy)alkyl acrylate (1). The structures of PPILCDs were characterized by IR spectroscopy, H-1 NMR spectroscopy, and MALDI-TOF mass spectroscopy. PPILCDs exhibit smectic liquid crystalline natures between -7 and +89 degrees C. The temperature range of the smectic phases expanded with increases in the generation of the dendritic core and the length of flexible spacers. The homeotropic orientation was allowed to take place in PPILCD with the second-generation scaffold, when it was slowly cooled.
引用
收藏
页码：6578 / 6586
页数：9
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