Thermal Behavior of Bisphenol-A-Based Copolybenzoxazine with a Nitrile Functional Group
Vol. 59, No. 4, pp. 221-227,
Aug. 2022
10.12772/TSE.2022.59.221
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Abstract
The thermal behavior of copolybenzoxazine with 2,2-bis(3,4-dihydro-3-phenyl-
2H-1,3-benzoxazine)propane and 2,2-bis(3,4-dihydro-3-benzonitrile-2H-1,3-benzoxazine)
propane was studied. The structure of the two monomers was confirmed by proton
nuclear magnetic resonance and Fourier transformed infrared spectroscopies. The thermal
polymerization behaviors of the benzoxazine monomers and their blends were studied
using differential scanning calorimetry and thermogravimetric analyses. Results indicated
that the nitrile functional group in the benzoxazine monomer significantly influences the
maximum curing temperature and char yield of the resin. The thermal decomposition
behaviors of the polybenzoxazines and copolybenzoxazines were examined at various
compositions. The copolybenzoxazines with a nitrile group exhibited excellent thermal stability
and a synergy effect on char yield.
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