期刊
HIGH PERFORMANCE POLYMERS
卷 32, 期 8, 页码 953-962出版社
SAGE PUBLICATIONS LTD
DOI: 10.1177/0954008320913105
关键词
Polybenzoxazine; acetylacetone metal salts; curing mechanism; thermal stability
资金
- Zhejiang Provincial Natural Science Foundation of China [LY19E030004]
- National Natural Science Foundation of China [51991355]
- Ningbo Natural Science Foundation of China [2018A610184, 2019A610144]
- Key Laboratory of Bio-based Polymeric Materials Technology and Application of Zhejiang Province [2018E10001]
To overcome high water absorption of inorganic metal salts and their poor compatibility with resin, acetylacetone metal salts (M(acac) (n) ) were selected as the catalysts of benzoxazine resin. Their effects on the catalytic activity, structure, and thermal stability of polybenzoxazine had been estimated by dynamic differential scanning calorimetry, in situ Fourier transform infrared spectroscopy, X-ray photoelectron spectroscopy, and thermal gravimetric analyzer. The results revealed that M(acac) (n) of iron (Fe3+), cobalt (Co3+ and Co2+), and copper (Cu2+) exhibited high catalytic activity and reduced evidently activation energy, especially acetylacetone iron salt. The addition of M(acac) (n) was beneficial to the formation of Ph-N-Ph structure, which was easy to form a denser carbon layer during thermal degradation, prevented heat transfer and further decomposition of the resin, and finally led to the increase of carbon residue at high temperature.
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