解聚
木质素
玻璃化转变
催化作用
胺化
有机溶剂
有机化学
聚合物
二胺
材料科学
化学
热稳定性
还原胺化
化学工程
高分子化学
工程类
作者
Xianyuan Wu,Maxim V. Galkin,Katalin Barta
出处
期刊:Chem catalysis
[Elsevier]
日期:2021-12-01
卷期号:1 (7): 1466-1479
被引量:11
标识
DOI:10.1016/j.checat.2021.10.022
摘要
The demand for high-performance materials is increasing, and most of these materials are petrol based. Therefore, the development of highly efficient and selective catalytic methods that allow access to industrially relevant polymer building blocks from complex biomass depolymerization mixtures is essential. Here, we report on a robust catalytic strategy to obtain the industrially relevant 4,4′-methylenebiscyclohexanamine (MBCA) from lignin oxidation mixtures and its use for constructing fully bio-based polybenzoxazines. The strategy consists of two challenging catalytic steps: 1) the funneling of lignin-derived bisphenol mixtures into 4,4′-methylenebiscyclohexanol (MBC) and 2) the highly selective amination of MBC with ammonia to obtain MBCA. The renewable polybenzoxazines were prepared from MBCA and phenolic lignin platform chemicals. The most promising, cured poly (S-MBCA), shows high glass transition temperature Tg of 315°C, outstanding thermal stability (T10% = 400°C), and good storage modulus (E′25°C = 3.8 GPa), which is competitive with commercial resins.
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