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A novel polybenzoxazine containing styrylpyridine structure via the Knoevenagel reaction
Author(s) -
Zhang Huachuan,
Li Min,
Deng Yuyuan,
Zhang Chengxi,
Ran Qichao,
Gu Yi
Publication year - 2014
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.40823
Subject(s) - knoevenagel condensation , fourier transform infrared spectroscopy , benzaldehyde , polymer chemistry , differential scanning calorimetry , thermal stability , monomer , polymerization , curing (chemistry) , yield (engineering) , materials science , chemistry , phenol , organic chemistry , polymer , chemical engineering , composite material , catalysis , physics , engineering , thermodynamics
In this article, a kind of styrylpyridine‐containing polybenzoxazine was obtained via the Knoevenagel reaction between benzaldehyde and methylpyridine groups. The benzoxazine monomer (MPBC) containing the benzaldehyde and methylpyridine groups was synthesized firstly and its structure was characterized by Fourier transform infrared (FTIR) spectra, 1 H NMR and 13 C NMR. With the aid of differential scanning calorimetry, FTIR, and photoluminescent tests, the interesting curing behaviors were probed. The results showed that the ring‐opening polymerization occurred at lower temperature, and the Knoevenagel reaction further took place at elevated temperature. The amine and phenol moieties were bonded together to form the styrylpyridine structure. Due to these special crosslinking structures, the corresponding polybenzoxazine exhibited excellent thermal stability, and had a special high char yield of 74.5%. © 2014 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2014 , 131 , 40823.