Two novel benzoxazine monomers containing carboxylic group have been synthesized and compared. The first monomer was prepared from the reaction of phenol and 13-aminotridecanoic acid, however, the second monomer was prepared from the reaction of hydroxybenzoic acid and octylamine for the second monomer. The chemical structure of the monomer was confirmed by FTIR, and 1H-NMR. The polymerization behavior of the monomers was studied by differential scanning calorimetry, indicating exothermic peaks at low temperature range of 181oC-206oC in comparsion with traditional benzoxazine monomers due to the catalytic role of carboxylic acid group on the ring-opening polymerization of benzoxazine monomers. The thermal stability of the polymers was studied by thermogravimetric analysis and the observed weight loss is attributed to the degradation of linear aliphatic amine at early stage.Keywords:  Carboxylic acid-functional benzoxazine; low polymerization temperature; low temperature degradation.

Carboxylic acid-functional benzoxazine monomers: A comparative study

243rd National Meeting (2012)

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