کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5204318 | 1381957 | 2009 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Synthesis and thermal properties of bisphthalonitriles containing aromatic ether nitrile linkages
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موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی آلی
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
Low-melting bisphthalonitrile oligomers with variable length of aromatic ether nitrile linkages (nPEN-BAPh) was firstly synthesized and the length of the linkages (n) was controlled by mole ratio of 2, 6-dichlorobenzonitrile and bisphenol A. The oligomers were characterized by FTIR and NMR spectra, and detailed study showed that the linkages were constructed in the backbone of nPEN-BAPh. The FTIR showed, with the curing reaction progressed, the characteristic peak of nitrile at 2230 cmâ1 disappeared while the characteristic peak of phthalocyanine ring at 3290, 1010 cmâ1 and triazine ring at 1360 cmâ1 appeared. The melting and polymerization temperature of the oligomers was around 60 °C and 220 °C, respectively. So a large processing window was obtained. The char yields of completely cured materials were above 65% at 800 °C in nitrogen and over 70% at 600 °C in air. All materials exhibited excellent thermal and thermo-oxidative stability.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Polymer Degradation and Stability - Volume 94, Issue 12, December 2009, Pages 2178-2183
Journal: Polymer Degradation and Stability - Volume 94, Issue 12, December 2009, Pages 2178-2183
نویسندگان
Ronghua Du, Wenting Li, Xiaobo Liu,