کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1397060 984213 2005 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Poly(1,3,4-oxadiazole-imide)s containing dimethylsilane groups
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی آلی
پیش نمایش صفحه اول مقاله
Poly(1,3,4-oxadiazole-imide)s containing dimethylsilane groups
چکیده انگلیسی

New poly(1,3,4-oxadiazole-imide)s containing dimethylsilane units have been prepared by solution polycondensation reaction of an aromatic dianhydride incorporating dimethylsilane group, namely bis(3,4-dicarboxyphenyl)dimethylsilane dianhydride, with different aromatic diamines having preformed 1,3,4-oxadiazole ring, such as 2,5-bis(p-aminophenyl)-1,3,4-oxadiazole, 2,5-bis[p-(4-aminophenoxy)phenyl]-1,3,4-oxadiazole, 2,5-bis[p-(3-aminophenoxy)phenyl]-1,3,4-oxadiazole, 2-(4-fluorophenyl)-5-(3,5-diaminophenyl)-1,3,4-oxadiazole, and 2-(4-dimethylaminophenyl)-5-(3,5-diaminophenyl)-1,3,4-oxadiazole. The polymers were easily soluble in polar organic solvents, such as N-methylpyrrolidinone, N,N-dimethylformamide, and pyridine, as well as in less polar organic solvents, such as tetrahydrofuran and chloroform. Very thin coatings deposited on silicon wafers exhibited smooth, pinhole-free surface in atomic force microscopy investigations. The polymers showed high thermal stability with decomposition temperature being above 415 °C.They exhibited a glass transition in the temperature range of 202–282 °C, with reasonable interval between glass transition and decomposition temperature. Solutions of the polymers in N,N-dimethylformamide exhibited fluorescence, having maximum emission wavelength in the range of 353–428 nm.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: European Polymer Journal - Volume 41, Issue 12, December 2005, Pages 2989–2997
نویسندگان
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