Synthesis of 3,5-disubstituted isoxazolines as a template for liquid-crystalline polymers

被引：22
|
作者：
Ritter, OMS [1 ]
Giacomelli, FC [1 ]
Passo, JA [1 ]
da Silveira, NP [1 ]
Merlo, AA [1 ]
机构：
[1] Univ Fed Rio Grande do Sul, Inst Quim, BR-91501970 Porto Alegre, RS, Brazil
来源：
POLYMER BULLETIN | 2006年 / 56卷 / 06期
关键词：
D O I：
10.1007/s00289-006-0526-2
中图分类号：
O63 [高分子化学（高聚物）];
学科分类号：
070305 ; 080501 ; 081704 ;
摘要：
The synthesis and mesomorphic properties of new polyacrylate liquid crystals 3,5-disubstituted isoxazolines 8a-d are discussed. 1,3-Dipolar cycloadditions of nitrile oxides generated in situ from oximes 2a-b in the presence of 4-substituted styrene 3 (X = Br, Cl and CH3) provided 3,5-disubstituted isoxazolines 5a-d. The monomers 7a-d were submitted to AIBN conditions and all the final polymers showed a stable nematic phase. The mesophase stability was dependent on the spacer length and terminal group at mesogenic core. Also, a small molecular weight effect was observed.
引用
收藏
页码：549 / 561
页数：13
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