Inherent flame-retardant vinyl ester resins with improved heat resistance enabled by additional P/N-containing cross-linking points
Article
Article Title | Inherent flame-retardant vinyl ester resins with improved heat resistance enabled by additional P/N-containing cross-linking points |
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ERA Journal ID | 1671 |
Article Category | Article |
Authors | Qiu, Mei, Chen, Xi, Wang, Jun, Wang, Jingsheng, Chen, Kaiwen, Yang, Shuang, Huo, Siqi and Wang, Hao |
Journal Title | Journal of Applied Polymer Science |
Journal Citation | 140 (23) |
Article Number | e53937 |
Number of Pages | 10 |
Year | 2023 |
Publisher | John Wiley & Sons |
Place of Publication | United States |
ISSN | 0021-8995 |
1097-4628 | |
Digital Object Identifier (DOI) | https://doi.org/10.1002/app.53937 |
Web Address (URL) | https://onlinelibrary.wiley.com/doi/10.1002/app.53937 |
Abstract | Due to the plasticizing effect, the phosphorus-derived flame retardants often imparted flame retardancy to thermosetting resins at the expense of heat resistance. To address this issue, the phosphorous/nitrogen flame retardant (DOPO-TGIC) and 4,4′-diphenyl methane diisocyanate (MDI) were covalently introduced into the cross-linked network of vinyl ester resin (VER) by the reaction of the OH groups in DOPO-TGIC and VER and the NCO groups in MDI. Thus, an intrinsically flame-retardant VER was obtained. The as-prepared VER sample exhibited increased glass-transition temperature (Tg) relative to virgin VER sample because DOPO-TGIC served as an additional cross-linking point during curing. Meanwhile, the P/N-containing VER sample featured superior flame-retardant properties, with a UL-94V-0 classification. Compared with VER sample, the peak heat release rate (PHRR) and total heat release (THR) of the P/N-containing VER sample were reduced by 55.6% and 44.0%, respectively. The improved flame retardancy was mainly due to the suppressed burning reaction in the gas phase and improved carbonization capacity in the condensed phase. Therefore, this work proposes a novel and effective strategy for addressing the trade-off between Tg and flame retardancy of thermosetting resins. |
ANZSRC Field of Research 2020 | 401609. Polymers and plastics |
Public Notes | File reproduced in accordance with the copyright policy of the publisher/author. |
Byline Affiliations | Wuhan University of Technology, China |
School of Engineering |
https://research.usq.edu.au/item/yyv72/inherent-flame-retardant-vinyl-ester-resins-with-improved-heat-resistance-enabled-by-additional-p-n-containing-cross-linking-points
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