Fast Reprocessing of Acetal Covalent Adaptable Networks with High Performance Enabled by Neighboring Group Participation
文献类型：期刊论文
| 作者 | Li, Qiong; Ma, Songqi; Li, Pengyun; Wang, Binbo; Yu, Zhen; Feng, Hongzhi; Liu, Yanlin; Zhu, Jin |
| 刊名 | MACROMOLECULES
 |
| 出版日期 | 2021 |
| 卷号 | 54期号:18页码:8423-8434 |
| 关键词 | VITRIMERS THERMOSETS CHEMISTRY ROBUST |
| 英文摘要 | Covalent adaptable networks (CANS) represent a transition material combining favorable features of thermosets and thermoplastics. However, it is still a huge challenge to simultaneously achieve fast reprocessability and high performance for CANs. Here, we designed catechol-based acetal CANs to achieve continuous reprocessing without sacrificing thermal and mechanical properties. A small-molecule model study demonstrated the significantly accelerated acetal exchange by neighboring group participation (NGP) of phenolic hydroxyl. Using this internally catalyzed acetal chemistry, a series of CANs with a broad range of properties were simply prepared from bio-based epigallocatechin gallate (EGCG) and tri(ethylene glycol) divinyl ether (TEGVE) via one-step click cross-linking without using catalysts or releasing small-molecule byproducts. The dynamic nature of the CANs was confirmed via stress relaxation and multiple recycling methods including extrusion. While the dense cross-link density and high rigidity of the network provided high solvent resistance and mechanical properties. This work provides a promising and practical method to produce fast-reprocessing dynamic covalent polymer networks with dense cross-link density and superior performance. |
| 源URL | [http://ir.nimte.ac.cn/handle/174433/21461]  |
| 专题 | 2021专题_期刊论文 |
| 作者单位 | 1.Zhu, J (corresponding author), Chinese Acad Sci, Ningbo Inst Mat Technol & Engn, Div Polymers & Composites, Key Lab Biobased Polymer Mat Technol & Applicat Z, Ningbo 315201, Peoples R China. 2.Ma, SQ |
| 推荐引用方式 GB/T 7714 | Li, Qiong,Ma, Songqi,Li, Pengyun,et al. Fast Reprocessing of Acetal Covalent Adaptable Networks with High Performance Enabled by Neighboring Group Participation[J]. MACROMOLECULES,2021,54(18):8423-8434. |
| APA | Li, Qiong.,Ma, Songqi.,Li, Pengyun.,Wang, Binbo.,Yu, Zhen.,...&Zhu, Jin.(2021).Fast Reprocessing of Acetal Covalent Adaptable Networks with High Performance Enabled by Neighboring Group Participation.MACROMOLECULES,54(18),8423-8434. |
| MLA | Li, Qiong,et al."Fast Reprocessing of Acetal Covalent Adaptable Networks with High Performance Enabled by Neighboring Group Participation".MACROMOLECULES 54.18(2021):8423-8434. |
入库方式： OAI收割
来源：宁波材料技术与工程研究所
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