Synthesis and properties of the bio-based isomeric benzoxazine resins: Revealing the effect of the neglected short alkyl substituents
文献类型：期刊论文
| 作者 | Liu, Jingkai; Wuliu, Yishun; Dai, Jinyue; Hu, Jingyuan; Liu, Xiaoqing |
| 刊名 | EUROPEAN POLYMER JOURNAL
 |
| 出版日期 | 2021 |
| 卷号 | 157 |
| 关键词 | RING-OPENING POLYMERIZATION FUNCTIONAL BENZOXAZINE THERMAL-PROPERTIES NETWORK STRUCTURE MELTING-POINT MONO COMPONENT OXAZINE DESIGN REGIOSELECTIVITY |
| 英文摘要 | Bio-based feedstocks usually contain many isomers with similar structures, and the short alkyl substituents are generally considered as low-reactive groups in benzoxazine chemistry due to their low induction effect and chemical inertness. Therefore, little attention has been paid on their effects on the synthesis or properties of benzoxazine. In this work, two bio-based benzoxazine isomers (CAR-fbz and THY-fbz) containing methyl and isopropyl groups with interchanged positions were synthesized from the renewable carvacrol and thymol. Their synthetic process, crystal features, and curing reactions were carefully investigated. Results showed that different side reacitions and by-products were detected under the same synthese conditions. And using the similar purification method, CAR-fbz and THY-fbz with high purity were found to have different crystal features. In addition, the cured systems also indicated varied H-bonding features and thermal properties based on differential scanning calorimetric (DSC) and thermogravimetric analysis (TGA) results. With the help of density functional theory (DFT) calculation, the reasons were attributed to the different electrophilicity of phenol moiety, varied molecular symmetry and intermolecular interaction caused by the overlooked short alkyls. Summarily, the leverage of short-chain alkyl groups on benzoxazine chemistry is revealed. The result is significant for the benzoxazine synthesis, especially when the renewable compounds are taken as the starting materials for bio-based benzoxazine preparation, which often has many isomers with similar structures. |
| 源URL | [http://ir.nimte.ac.cn/handle/174433/21650]  |
| 专题 | 中国科学院宁波材料技术与工程研究所 2021专题_期刊论文 |
| 作者单位 | Liu, XQ (corresponding author), Chinese Acad Sci, Ningbo Inst Mat Technol & Engn, Ningbo 315201, Zhejiang, Peoples R China. |
| 推荐引用方式 GB/T 7714 | Liu, Jingkai,Wuliu, Yishun,Dai, Jinyue,et al. Synthesis and properties of the bio-based isomeric benzoxazine resins: Revealing the effect of the neglected short alkyl substituents[J]. EUROPEAN POLYMER JOURNAL,2021,157. |
| APA | Liu, Jingkai,Wuliu, Yishun,Dai, Jinyue,Hu, Jingyuan,&Liu, Xiaoqing.(2021).Synthesis and properties of the bio-based isomeric benzoxazine resins: Revealing the effect of the neglected short alkyl substituents.EUROPEAN POLYMER JOURNAL,157. |
| MLA | Liu, Jingkai,et al."Synthesis and properties of the bio-based isomeric benzoxazine resins: Revealing the effect of the neglected short alkyl substituents".EUROPEAN POLYMER JOURNAL 157(2021). |
入库方式： OAI收割
来源：宁波材料技术与工程研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。