- Synthesis and characterization of novel polybenzimidazoles containing 4-phenyl phthalazinone moiety
- 点击次数：
- 论文类型： 期刊论文
- 发表时间： 2011-09-01
- 发表刊物： EUROPEAN POLYMER JOURNAL
- 收录刊物： Scopus、SCIE、EI
- 卷号： 47
- 期号： 9
- 页面范围： 1852-1860
- ISSN号： 0014-3057
- 关键字： Polybenzimidazole; 4-Phenyl phthalazinone; Solubility; Thermal property
- 摘要： 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 H-1 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 (T(g)s) in the range of 398-408 degrees 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 degrees C and 560 to 672 degrees C, respectively. (C) 2011 Elsevier Ltd. All rights reserved.
