Dynamic transfer auto-catalysis of epoxy vitrimers enabled by the carboxylic acid/epoxy ratio based on facilely synthesized trifunctional monoesterified cyclic anhydrides
文献类型：期刊论文
| 作者 | Liu, Yanlin; Ma, Songqi; Li, Qiong; Wang, Sheng; Huang, Kaifeng; Xu, Xiwei; Wang, Binbo; Zhu, Jin |
| 刊名 | EUROPEAN POLYMER JOURNAL
 |
| 出版日期 | 2020 |
| 卷号 | 135 |
| 关键词 | HIGHLY MALLEABLE THERMOSETS HIGH-PERFORMANCE DEGRADABLE THERMOSETS STRESS-RELAXATION SHAPE-MEMORY SOYBEAN OIL TRANSESTERIFICATION CATALYST NETWORKS ACID |
| DOI | 10.1016/j.eurpolymj.2020.109881 |
| 英文摘要 | Vitrimers based on transesterification exhibit reprocessable and amendable features, but highly rely on external catalyst to accelerate the stress relaxation and network rearrangement. Here we prepared reprocessable autocatalyzed epoxy vitrimers via introducing dynamic transferrable monoesterified cyclic anhydrides into crosslinked networks. Two trifunctional monoesterified cyclic anhydrides MT and ST were facilely synthesized by catalyst-free melting reaction of maleic anhydride and succinic anhydride with trimethylolpropane, respectively, and were utilized to cure the bisphenol A epoxy DER 331. The excess monoesterified anhydrides (containing catalytic carboxyl groups) grafted in the cross-linked networks could undergo dynamic reversible reactions to transfer from one site to another, as a result, the transesterification at different sites of the networks could be effectively catalyzed. The dynamic transfer of catalytic group followed two mechanisms:i) removal-monoesterification of cyclic anhydrides and ii) transesterification of monoesterified cyclic anhydrides with hydroxyl group. In addition to the excellent reprocessability and rapid stress relaxation, the auto-catalyzed epoxy vitimers presented high glass transition temperatures of similar to 110 degrees C, Young's modulus of similar to 3103 MPa and tensile strength of similar to 70.6 MPa. This dynamic transfer catalysis will provide a new idea to accelerate the stress relaxation and network rearrangement of vitrimers. |
| 学科主题 | Polymer Science |
| 源URL | [http://ir.nimte.ac.cn/handle/174433/20649]  |
| 专题 | 2020专题 2020专题_期刊论文 |
| 作者单位 | Ma, SQ (corresponding author), Chinese Acad Sci, Ningbo Inst Mat Technol & Engn, Key Lab Biobased Polymer Mat Technol & Applicat Z, Lab Polymers & Composites, Ningbo 315201, Peoples R China. |
| 推荐引用方式 GB/T 7714 | Liu, Yanlin,Ma, Songqi,Li, Qiong,et al. Dynamic transfer auto-catalysis of epoxy vitrimers enabled by the carboxylic acid/epoxy ratio based on facilely synthesized trifunctional monoesterified cyclic anhydrides[J]. EUROPEAN POLYMER JOURNAL,2020,135. |
| APA | Liu, Yanlin.,Ma, Songqi.,Li, Qiong.,Wang, Sheng.,Huang, Kaifeng.,...&Zhu, Jin.(2020).Dynamic transfer auto-catalysis of epoxy vitrimers enabled by the carboxylic acid/epoxy ratio based on facilely synthesized trifunctional monoesterified cyclic anhydrides.EUROPEAN POLYMER JOURNAL,135. |
| MLA | Liu, Yanlin,et al."Dynamic transfer auto-catalysis of epoxy vitrimers enabled by the carboxylic acid/epoxy ratio based on facilely synthesized trifunctional monoesterified cyclic anhydrides".EUROPEAN POLYMER JOURNAL 135(2020). |
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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