Dai Jinyue, Teng Na, Peng Yunyan, Liu Yuan, Cao Lijun, Zhu Jin, Liu Xiaoqing
Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo, Zhejiang, 315201, P. R. China.
Key Laboratory of Bio-based Polymeric Materials Technology and Application of Zhejiang Province, Ningbo, Zhejiang, 315201, P. R. China.
ChemSusChem. 2018 Sep 21;11(18):3175-3183. doi: 10.1002/cssc.201801404. Epub 2018 Aug 13.
A biobased benzoxazine resin (Dz-f) demonstrating excellent thermal properties was synthesized from daidzein and furfurylamine by using a microwave heating method. The chemical structure of synthesized benzoxazine monomer was identified by FTIR and NMR ( H and C NMR) before it was cured and its thermal properties evaluated by differential scanning calorimetry (DSC), TGA, and dynamic mechanical analysis (DMA). The cured resin p(Dz-f) exhibited a glass transition temperature (T ) of 391 °C, a very high char yield of 68.7 %, and outstanding thermal stability; the T value obtained was the highest thermal stability value ever reported for polybenzoxazine with a high biobased content. Moreover, Dz-f demonstrated a satisfying processability, which was rare for the high-performance thermosetting resins. This work provided us with a new strategy for the preparation of high biocontent resins with excellent thermal properties. In addition, the combination of biobased feedstocks with a microwave-assisted heating method as well as the potential application of this approach in high-end fields might perpetuate remarkable progress towards the sustainable development of the polymeric industry.
采用微波加热法，以大豆苷元和糠胺为原料合成了一种具有优异热性能的生物基苯并恶嗪树脂（Dz-f）。在固化之前，通过傅里叶变换红外光谱（FTIR）和核磁共振（H和C NMR）对合成的苯并恶嗪单体的化学结构进行了鉴定，并通过差示扫描量热法（DSC）、热重分析（TGA）和动态力学分析（DMA）对其热性能进行了评估。固化后的树脂p（Dz-f）表现出391℃的玻璃化转变温度（T）、68.7%的非常高的残炭率以及出色的热稳定性；所获得的T值是具有高生物基含量的聚苯并恶嗪所报道的最高热稳定性值。此外，Dz-f表现出令人满意的加工性能，这对于高性能热固性树脂来说是罕见的。这项工作为制备具有优异热性能的高生物含量树脂提供了一种新策略。此外，生物基原料与微波辅助加热方法的结合以及这种方法在高端领域的潜在应用可能会为聚合物工业的可持续发展带来显著进展。
