Breaking the trade-off between mechanical properties and fire safety of epoxy resins based on phosphaphenanthrene derivatives by covalent crosslinking
Article
Gan, Xianghui, Wang, Jun, Yang, Shuang, Chen, Xi, Wang, Jingsheng, Chen, Kaiwen, Zhang, Yuguo, Zhu, Lu, Xu, Lin and Huo, Siqi. 2024. "Breaking the trade-off between mechanical properties and fire safety of epoxy resins based on phosphaphenanthrene derivatives by covalent crosslinking." Polymer Degradation and Stability. 220. https://doi.org/10.1016/j.polymdegradstab.2023.110634
| Article Title | Breaking the trade-off between mechanical properties and fire safety of epoxy resins based on phosphaphenanthrene derivatives by covalent crosslinking |
|---|---|
| ERA Journal ID | 1691 |
| Article Category | Article |
| Authors | Gan, Xianghui, Wang, Jun, Yang, Shuang, Chen, Xi, Wang, Jingsheng, Chen, Kaiwen, Zhang, Yuguo, Zhu, Lu, Xu, Lin and Huo, Siqi |
| Journal Title | Polymer Degradation and Stability |
| Journal Citation | 220 |
| Article Number | 110634 |
| Number of Pages | 10 |
| Year | 2024 |
| Publisher | Elsevier |
| Place of Publication | United Kingdom |
| ISSN | 0141-3910 |
| 0144-2880 | |
| 1873-2321 | |
| Digital Object Identifier (DOI) | https://doi.org/10.1016/j.polymdegradstab.2023.110634 |
| Web Address (URL) | https://www.sciencedirect.com/science/article/pii/S014139102300383X |
| Abstract | The high brittleness and flammability issues of epoxy resins (EPs) seriously limit their high-performance applications in industries. However, most of the current research has been failing to simultaneously enhance both toughness and flame retardancy of EP by a facile method. In this work, three phosphaphenanthrene derivatives (DOPO, ODOPM and DOPA) were applied to prepare intrinsic flame-retardant epoxy resins by using diphenylmethane-4,4′-diisocyanate (MDI) as a bridge. The as-prepared EP/MDI/DOPO, EP/MDI/ODOPM, and EP/MDI/DOPA exhibited obviously enhanced flame retardancy and mechanical performance relative to EP. As the P content reached 1 wt%, the limiting oxygen indexes (LOIs) and vertical combustion (UL-94) levels of EP/MDI/DOPO, EP/MDI/ODOPM and EP/MDI/DOPA reached 28.9 %, 31.2 %, and 33.4 %, and V-1, V-0, and V-0. The impact strengths of EP/MDI/ODOPM and EP/MDI/DOPA containing 0.75 wt % of phosphorus were higher than that of EP by 209.3 % and 212.4 %, respectively, due to the covalent linkage between the phosphaphenanthrene-derived groups, MDI, and polymer network. Thereby, a simple method is revealed in this work to improve both fire retardance and toughness of EP, which facilitates its high-performance development. |
| Keywords | Epoxy resin; Diphenylmethane-4,4′-diisocyanate; Phosphaphenanthrene; Flame retardancy ; Mechanical properties |
| Contains Sensitive Content | Does not contain sensitive content |
| ANZSRC Field of Research 2020 | 401609. Polymers and plastics |
| Public Notes | Files associated with this item cannot be displayed due to copyright restrictions. |
| Byline Affiliations | Wuhan University of Technology, China |
| Wuhan East Lake of HiTech Group, China | |
| School of Engineering | |
| Centre for Future Materials |
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