A highly fire-safe and smoke-suppressive single-component epoxy resin with switchable curing temperature and rapid curing rate
Article
Article Title | A highly fire-safe and smoke-suppressive single-component epoxy resin with switchable curing temperature and rapid curing rate |
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ERA Journal ID | 4883 |
Article Category | Article |
Authors | Yang, Shuang (Author), Huo, Siqi (Author), Wang, Jun (Author), Zhang, Bin (Author), Wang, Jingsheng (Author), Ran, Shiya (Author), Fang, Zhengping (Author), Song, Pingan (Author) and Wang, Hao (Author) |
Journal Title | Composites Part B: Engineering |
Journal Citation | 207, pp. 1-11 |
Article Number | 108601 |
Number of Pages | 11 |
Year | 2021 |
Publisher | Elsevier |
Place of Publication | United Kingdom |
ISSN | 1359-8368 |
Digital Object Identifier (DOI) | https://doi.org/10.1016/j.compositesb.2020.108601 |
Web Address (URL) | https://www.sciencedirect.com/science/article/pii/S1359836820336477 |
Abstract | The design of highly fire-safe and smoke-suppressive single-component epoxy (EP) resins combining modest curing temperature and fast curing rate has been desirable yet very challenging in both academia and industry. Herein, we report a facile design of a phosphorus/imidazole-containing single-component EP system via incorporating 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide (DOPO) and a flame-retardant curing agent cyclotriphosphazene-modified benzimidazole (BICP) into EP. Our results show that EP/DOPO/BICP exhibits a rapid modest-temperature curing feature because DOPO serves as a switch that triggers BICP to release benzimidazole (BIM) via substitution reaction in the initial curing stage. Moreover, as-prepared EP/DOPO/BICP shows outstanding fire retardancy, reflected by the high limited oxygen index (LOI) of 38.3% and UL-94 V-0 rating. Compared to the control EP system, the peak of heat release rate (PHRR) and total smoke production (TSP) of EP/DOPO/BICP remarkably decrease by ~74.5% and ~50.6%, respectively, which is superior to previously-reported flame-retardant P-containing epoxy counterparts. The significant enhancements in flame retardancy and smoke suppression are mainly due to the formation of a highly intumescent char layer and the reduced burning degree of pyrolysis fragments. This work offers a facile and scalable strategy for creating fast-curing, modest-temperature curable, highly fire-resistant and smoke-suppressive one-component epoxy systems applicable to large-scale industrial production. |
Keywords | Single-component epoxy resin; Benzimidazole; Curing behaviors; Fire retardancy; Smoke suppression |
Contains Sensitive Content | Does not contain sensitive content |
ANZSRC Field of Research 2020 | 401605. Functional materials |
401609. Polymers and plastics | |
401602. Composite and hybrid materials | |
Public Notes | Files associated with this item cannot be displayed due to copyright restrictions. |
Institution of Origin | University of Southern Queensland |
Byline Affiliations | Wuhan University of Technology, China |
NingboTech University, China | |
Centre for Future Materials | |
Centre for Future Materials |
https://research.usq.edu.au/item/q6vq9/a-highly-fire-safe-and-smoke-suppressive-single-component-epoxy-resin-with-switchable-curing-temperature-and-rapid-curing-rate
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