A P/Si-containing polyethylenimine curing agent towards transparent, durable fire-safe, mechanically-robust and tough epoxy resins
Article
Article Title | A P/Si-containing polyethylenimine curing agent towards transparent, durable fire-safe, mechanically-robust and tough epoxy resins |
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ERA Journal ID | 3854 |
Article Category | Article |
Authors | Wang, Cheng, Huo, Siqi, Ye, Guofeng, Song, Pingan, Wang, Hao and Liu, Zhitian |
Journal Title | Chemical Engineering Journal |
Journal Citation | 451 |
Article Number | 138768 |
Number of Pages | 13 |
Year | 2023 |
Publisher | Elsevier |
Place of Publication | Netherlands |
ISSN | 1385-8947 |
1873-3212 | |
Digital Object Identifier (DOI) | https://doi.org/10.1016/j.cej.2022.138768 |
Web Address (URL) | https://www.sciencedirect.com/science/article/pii/S1385894722042498 |
Abstract | Epoxy resin (EP) features superior comprehensive performances, but inherent flammability seriously limits its industrial applications. Current flame-retardant strategies often bring about enhanced flame retardancy but deteriorated mechanical, thermal and optical properties and neglect flame retardant durability. Herein, a phosphorus/silicon-containing polyethylenimine (PES) is designed as a multifunctional curing agent for EP. Replacing polyethylenimine (PEI) with PES maintains high visible light transmittance of EPs and improves the UV-blocking properties. The EP cured by 30 wt% PES (EP/30PES) exhibits enhanced mechanical properties compared with the EP cured by 15 wt% PEI (EP/15PEI). EP/30PES achieves a limiting oxygen index (LOI) of 35.0% and a UL-94 V-0 rating, and its peak smoke release rate (PSPR) reduces by 63.8% relative to that of EP/15PEI. Hence, the great flame retardancy, smoke suppression and mechanical performances of EP/30PES enable it to outperform previous flame-retardant EP/aliphatic amine counterparts. Meanwhile, EP/30PES shows durable flame retardancy, which still achieves a UL-94 V-0 classification after acid/alkali/aging resistance tests. This work provides an advanced design of multifunctional curing agents to create durable fire-safe EPs with great UV-shielding and mechanical performances. |
Keywords | Comprehensive performances; Epoxy resin; Phosphorus; Polyethylenimine; Silicon |
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 Institute of Technology, China |
NingboTech University, China | |
Centre for Future Materials |
https://research.usq.edu.au/item/yyxy8/a-p-si-containing-polyethylenimine-curing-agent-towards-transparent-durable-fire-safe-mechanically-robust-and-tough-epoxy-resins
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