کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1396019 984153 2011 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Synthesis and characterization of novel polybenzimidazoles containing 4-phenyl phthalazinone moiety
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی آلی
پیش نمایش صفحه اول مقاله
Synthesis and characterization of novel polybenzimidazoles containing 4-phenyl phthalazinone moiety
چکیده انگلیسی

A novel series of homo- and copoly(phthalazinone benzimidazole)s were synthesized from various stoichiometric mixtures of 4-(4-(4-(4-carboxyphenoxy)phenyl)-1-oxophthalazin-2(1H)-yl)benzoic acid (CPPBC) and isophthalic acid (IPA) with 3,3′-diaminobenzidine (DAB) by solution polycondensation in polyphosphoric acid (PPA). The structures of the obtained polymers were characterized by FT-IR and 1H NMR. The obtained polybenzimidazoles were found to be soluble in aprotic polar solvents such as N-methyl-2-pyrolidinone (NMP), N,N-dimethylacetamide (DMAc), dimethyl sulfoxide (DMSO) and m-cresol, without the addition of inorganic salts. The inherent viscosities of the polybenzimidazoles were in the range of 1.10–2.05 dL/g. All of the polymers show amorphous nature as evaluated by WAXD. These polymers have high glass transition temperatures (Tgs) in the range of 398–408 °C. Thermogravimetric analysis exhibit that these polybenzimidazoles containing 4-phenyl phthalazinone moiety have excellent thermal stability with the temperatures for 5% and 10% weight loss of the polymers ranging from 516 to 594 °C and 560 to 672 °C, respectively.

Figure optionsDownload as PowerPoint slideHighlights
► A novel series of polybenzimidazoles containing non-coplanar 4-phenyl phthalazinone moiety have been synthesized.
► The inherent viscosities of the polybenzimidazoles were in the range of 1.10 to 2.05 dL/g.
► They have good solubility in polar aprotic solvents.
► They exhibit excellent thermal stability and high glass transition temperatures.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: European Polymer Journal - Volume 47, Issue 9, September 2011, Pages 1852–1860
نویسندگان
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