期刊
POLYMER BULLETIN
卷 70, 期 4, 页码 1125-1142出版社
SPRINGER
DOI: 10.1007/s00289-012-0892-x
关键词
Poly(amide-ether); Direct polycondensation; Thermal properties; Fluorescent; Solubility
Two new para-linked diether-diamines, bis(4-(4-amino-2-(4,5-diphenyl-1H-imidazol-2-yl)phenoxy) phenyl)methanone and bis(4-(4-amino-2-(4,5-diphenyl-1H-imidazol-2-yl)phenoxy) phenyl)hexafluoropropane, bearing two ortho-linked phenyl-substituted imidazole pendants and trifluoromethyl groups were synthesized by the nucleophilic chlorodisplacement reaction of the synthesized 2-(2-chloro-5-nitrophenyl)-4,5-diphenyl-1H-imidazole with 4,4'-dihydroxybenzophenone or 4,4'-(hexafluoroisopropylidene)diphenol in refluxing DMAc in the presence of potassium carbonate. These diamines were utilized to prepare a series of novel poly(amide-ether)s (PAEs) via direct phosphorylation polycondensation with aliphatic and aromatic dicarboxylic acids. The polymeric samples were readily soluble in a variety of organic solvents and formed low-colored and flexible thin films via solution casting. These polymers showed glass-transition temperatures (T (g)s) between 204 and 308 A degrees C. Thermal behaviors of the PAEs were characterized by thermogravimetric analysis, and the 10 % weight loss temperatures were found to be in the range of 330-450 A degrees C in N-2. The PAEs exhibited fluorescence emission in solution and in solid state with maxima around 423-494 nm and with the quantum yields in the range of 6-28 %.
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