Synthesis of a DOPO-containing imidazole curing agent and its application in reactive flame retarded epoxy resin
Article
Article Title | Synthesis of a DOPO-containing imidazole curing agent and its application in reactive flame retarded epoxy resin |
---|---|
ERA Journal ID | 1691 |
Article Category | Article |
Authors | Huo, Siqi, Wang, Jun, Yang, Shuang, Li, Chuan, Wang, Xiaolei and Cai, Haopeng |
Journal Title | Polymer Degradation and Stability |
Journal Citation | 159, pp. 79-89 |
Number of Pages | 11 |
Year | 2019 |
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.2018.11.021 |
Web Address (URL) | https://www.sciencedirect.com/science/article/abs/pii/S0141391018303719 |
Abstract | A novel DOPO-containing imidazole curing agent (DIB) was successfully synthesized, and served as a co-curing agent of 4,4‘-diaminediphenyl sulfone (DDS) to prepare a reactive flame-retarded epoxy thermoset (EP/DDS/DIB). The DSC results showed that the curing temperature of EP/DDS/DIB mixture was much lower than that of EP/DDS mixture due to the catalytic curing effect of imidazole group. Although the Tg values of EP/DDS/DIB thermosets decreased in some degree, they were still obviously higher than that of EP/DDS/DOPO thermoset. The combustion tests indicated that DIB was a high-efficiency flame retardant for epoxy resin. The LOI value and UL94 rating of EP/DDS/DIB-0.75 sample reached 36.8% and V-0, respectively. In addition, the pk-HRR, av-HRR and THR of EP/DDS/DIB-1.0 thermoset were decreased by 57.2%, 37.9% and 36.0%, respectively, compared with those of EP/DDS thermoset. The studies concerning decomposition products in both condensed and gaseous phases revealed that the introduction of DIB brought about the formation of a protective intumescent char layer and the release of phosphorus-containing radicals and noncombustible nitrogen-containing fragments during combustion. DIB exerted bi-phase flame retardant effect on epoxy resin. |
Keywords | Epoxy resin |
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 |
Shanghai Composites Science and Technique, China |
https://research.usq.edu.au/item/yyy01/synthesis-of-a-dopo-containing-imidazole-curing-agent-and-its-application-in-reactive-flame-retarded-epoxy-resin
26
total views0
total downloads1
views this month0
downloads this month