期刊
THERMOCHIMICA ACTA
卷 602, 期 -, 页码 22-29出版社
ELSEVIER
DOI: 10.1016/j.tca.2015.01.005
关键词
Bisphthalonitrile; Self-promoted bisphthalonitrile; Curing kinetics; Thermal properties
资金
- National Natural Science Foundation of China [50973022]
- Specialized Research Funds for the Doctoral Program of Higher Education [20122304110019]
- Fundamental Research Funds for the Central Universities [HEUCFT1009]
- open fund of Key Laboratory of Superlight Material and Surface Technology of Ministry of Education, Harbin Engineering University
A novel amino-containing fluorene-based bisphthalonitrile monomer, 9,9-bis(4-aminophenyl)-2,7-(3,4-dicyanophenoxy)-fluorene (AFPN), was successfully synthesized via the nucleophilic displacement of the nitro-substituent from 4-nitrophthalonitrile. The structure of AFPN was confirmed by Fourier transform infrared (FT-IR), H-1 and C-13 nuclear magnetic resonance (NMR). Its curing behavior and curing kinetics were investigated using differential scanning calorimetry (DSC) and FT-IR techniques. Isoconversional method based on Starink was applied to analyze the curing process of AFPN. The thermal and mechanical properties of the cured product were evaluated by thermogravimetric analysis (TGA) and dynamic mechanical analysis (DMA). The AFPN showed a self-promoted curing behavior, whereas the introduction of the amino groups increased its curing rate and lowered its curing temperature. Additionally, its cured polymer showed an excellent thermal and thermo-oxidative stability, since its char yield reached 76.5% at 800 degrees C in nitrogen and 83.4% at 600 degrees C in air, respectively. (C) 2015 Elsevier B.V. All rights reserved.
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