Dynamic Crosslinking: An Efficient Approach to Fabricate Epoxy Vitrimer
Epoxy vitrimers with reprocessability, recyclability, and a self-healing performance have attracted increasingly attention, but are usually fabricated through static curing procedures with a low production efficiency. Herein, we report a new approach to fabricate an epoxy vitrimer by dynamic crossli...
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| Format: | Article |
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MDPI AG
2021-02-01
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| Series: | Materials |
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| Online Access: | https://www.mdpi.com/1996-1944/14/4/919 |
| _version_ | 1797396432266723328 |
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| author | Yin Ran Ling-Ji Zheng Jian-Bing Zeng |
| author_facet | Yin Ran Ling-Ji Zheng Jian-Bing Zeng |
| author_sort | Yin Ran |
| collection | DOAJ |
| description | Epoxy vitrimers with reprocessability, recyclability, and a self-healing performance have attracted increasingly attention, but are usually fabricated through static curing procedures with a low production efficiency. Herein, we report a new approach to fabricate an epoxy vitrimer by dynamic crosslinking in a torque rheometer, using diglycidyl ether of bisphenol A and sebacic acid as the epoxy resin and curing agent, respectively, in the presence of zinc acetylacetonate as the transesterification catalyst. The optimal condition for fabricating the epoxy vitrimer (EVD) was dynamic crosslinking at 180 °C for ~11 min. A control epoxy vitrimer (EVS) was prepared by static curing at 180 °C for ~11 min. The structure, properties, and stress relaxation of the EVD and EVS were comparatively investigated in detail. The EVS did not cure completely during static curing, as evidenced by the continuously increasing gel fraction when subjected to compression molding. The gel fraction of the EVD did not change with compression molding at the same condition. The physical, mechanical, and stress relaxation properties of the EVD prepared by dynamic crosslinking were comparable to those of the EVS fabricated by static curing, despite small differences in the specific property parameters. This study demonstrated that dynamic crosslinking provides a new technique to efficiently fabricate an epoxy vitrimer. |
| first_indexed | 2024-03-09T00:51:12Z |
| format | Article |
| id | doaj.art-173043da7a2c403f93538d1e23e94d08 |
| institution | Directory Open Access Journal |
| issn | 1996-1944 |
| language | English |
| last_indexed | 2024-03-09T00:51:12Z |
| publishDate | 2021-02-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Materials |
| spelling | doaj.art-173043da7a2c403f93538d1e23e94d082023-12-11T17:10:27ZengMDPI AGMaterials1996-19442021-02-0114491910.3390/ma14040919Dynamic Crosslinking: An Efficient Approach to Fabricate Epoxy VitrimerYin Ran0Ling-Ji Zheng1Jian-Bing Zeng2Chongqing Key Laboratory of Soft-Matter Material Chemistry and Function Manufacturing, School of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, ChinaChongqing Key Laboratory of Soft-Matter Material Chemistry and Function Manufacturing, School of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, ChinaChongqing Key Laboratory of Soft-Matter Material Chemistry and Function Manufacturing, School of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, ChinaEpoxy vitrimers with reprocessability, recyclability, and a self-healing performance have attracted increasingly attention, but are usually fabricated through static curing procedures with a low production efficiency. Herein, we report a new approach to fabricate an epoxy vitrimer by dynamic crosslinking in a torque rheometer, using diglycidyl ether of bisphenol A and sebacic acid as the epoxy resin and curing agent, respectively, in the presence of zinc acetylacetonate as the transesterification catalyst. The optimal condition for fabricating the epoxy vitrimer (EVD) was dynamic crosslinking at 180 °C for ~11 min. A control epoxy vitrimer (EVS) was prepared by static curing at 180 °C for ~11 min. The structure, properties, and stress relaxation of the EVD and EVS were comparatively investigated in detail. The EVS did not cure completely during static curing, as evidenced by the continuously increasing gel fraction when subjected to compression molding. The gel fraction of the EVD did not change with compression molding at the same condition. The physical, mechanical, and stress relaxation properties of the EVD prepared by dynamic crosslinking were comparable to those of the EVS fabricated by static curing, despite small differences in the specific property parameters. This study demonstrated that dynamic crosslinking provides a new technique to efficiently fabricate an epoxy vitrimer.https://www.mdpi.com/1996-1944/14/4/919epoxy vitrimertransesterificationdynamic crosslinkingstatic curing |
| spellingShingle | Yin Ran Ling-Ji Zheng Jian-Bing Zeng Dynamic Crosslinking: An Efficient Approach to Fabricate Epoxy Vitrimer Materials epoxy vitrimer transesterification dynamic crosslinking static curing |
| title | Dynamic Crosslinking: An Efficient Approach to Fabricate Epoxy Vitrimer |
| title_full | Dynamic Crosslinking: An Efficient Approach to Fabricate Epoxy Vitrimer |
| title_fullStr | Dynamic Crosslinking: An Efficient Approach to Fabricate Epoxy Vitrimer |
| title_full_unstemmed | Dynamic Crosslinking: An Efficient Approach to Fabricate Epoxy Vitrimer |
| title_short | Dynamic Crosslinking: An Efficient Approach to Fabricate Epoxy Vitrimer |
| title_sort | dynamic crosslinking an efficient approach to fabricate epoxy vitrimer |
| topic | epoxy vitrimer transesterification dynamic crosslinking static curing |
| url | https://www.mdpi.com/1996-1944/14/4/919 |
| work_keys_str_mv | AT yinran dynamiccrosslinkinganefficientapproachtofabricateepoxyvitrimer AT lingjizheng dynamiccrosslinkinganefficientapproachtofabricateepoxyvitrimer AT jianbingzeng dynamiccrosslinkinganefficientapproachtofabricateepoxyvitrimer |