Journal
EUROPEAN POLYMER JOURNAL
Volume 156, Issue -, Pages -Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.eurpolymj.2021.110607
Keywords
Benzoxazine; Pterostilbene; Renewable resources; High performance; Thermoset
Categories
Funding
- National Natural Science Foundation of China [52073125, 51603093]
- Jiangsu Qinglan Project
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Two novel fully biobased mono-benzoxazine resins have been synthesized and characterized, showing good thermal stability and corrosion protection properties. The study highlights the potential of using natural renewable pterostilbene for preparing high-performance bio-based polybenzoxazines.
Two novel fully biobased mono-benzoxazine resins have been designed and synthesized using pterostilbene, furfurylamine/stearylamine and paraformaldehyde via a solventless reaction. The structures of newly obtained mono-benzoxazine monomers have been characterized by nuclear magnetic resonance (NMR) spectroscopy, Fourier transform infrared (FT-IR) spectroscopy and high-resolution mass spectrometry (HR-MS). The detailed assignments for oxazine-ring protons and carbons in each benzoxazine are identified using 1H-13C heteronuclear multiple quantum coherence spectroscopy (HMQC). Besides, the polymerization processes of benzoxazine resins are studied by differential scanning calorimetry (DSC) and in situ FT-IR spectroscopy, and the thermal stability of their corresponding polybenzoxazines are investigated by thermogravimetric analysis (TGA). Moreover, coatings of both polybenzoxazines on glass slides and low-carbon steels have also been prepared to evaluate their anticorrosion performance. The results indicate that both polybenzoxazines possess good thermal stability and can play efficient roles for shielding corrosion as coatings. Therefore, the current study highlights the utility of the natural renewable pterostilbene as a promising candidate to prepare high-performance bio-based polybenzoxazines.
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