New siloxane-organic polyesters with azobenzene side chains.: Synthesis, thermotropic behavior and surface properties

被引：12
|
作者：
Racles, Carmen
Filip, Daniela
Cazacu, Maria
Cozan, Vasile
Toth, Andras
Ioanid, Ghiocel
机构：
[1] Petru Poni Inst Macromol Chem, Iasi 700487, Romania
[2] Hungarian Acad Sci, Chem Res Ctr, H-1525 Budapest, Hungary
来源：
MACROMOLECULAR CHEMISTRY AND PHYSICS | 2006年 / 207卷 / 17期
关键词：
azo polymers; ESCA/XPS; liquid-crystalline polymers (LCP); polycondensation; siloxane;
D O I：
10.1002/macp.200600201
中图分类号：
O63 [高分子化学（高聚物）];
学科分类号：
070305 ; 080501 ; 081704 ;
摘要：
New siloxane-organic polyesters, bearing azotype units in the side chain, were synthesized by direct solution polycondensation at room temperature, starting from 2,2-[4-[(4-nitrophenyl)azolphenyl]iminobisethanol (Disperse Red 19) and different siloxane diacids, using dicyclohexylcarbodiimide as an activator and 4-(N,N-dimethylamino)pyridinium-p-toluenesulfonate as the catalyst. The structure of the obtained polyesters was confirmed by H-1 and C-13 NMR as well as IR spectroscopy. The molecular weight and polydispersity were estimated by GPC. The thermotropic behavior was investigated by POM, DSC and TOA. The surface composition was determined by ESCA (XPS) analysis and proved enrichment in silicon for all samples. All compounds show good solubility in common organic solvents.
引用
收藏
页码：1599 / 1609
页数：11
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