Flame-retardant, transparent, mechanically-strong and tough epoxy resin enabled by high-efficiency multifunctional boron-based polyphosphonamide

Huo, Siqi and Zhou, Zhongxiao and Jiang, Jiawei and Sai, Ting and Ran, Shiya and Fang, Zhengping and Song, Pingan ORCID: https://orcid.org/0000-0003-1082-652X and Wang, Hao (2022) Flame-retardant, transparent, mechanically-strong and tough epoxy resin enabled by high-efficiency multifunctional boron-based polyphosphonamide. Chemical Engineering Journal, 427:131578. pp. 1-15. ISSN 1385-8947


Abstract

It is of great significance to develop high-performance epoxy resins (EPs) combining superior flame retardancy, smoke suppression, thermal oxidation stability, transparency and mechanical properties. However, current flame retardant design strategy usually realizes satisfied flame retardancy at the expense of other properties. Herein, a novel multifunctional high-efficiency boron-containing polyphosphonamide (PB) is synthesized, and its impacts on integrated properties of EP are studied thoroughly. As expected, the well-designed PB features high flame retardant efficiency due to the combination of phosphorus, boron and nitrogen elements, only 3 wt% of which increases the limiting oxygen index (LOI) and UL-94 classification of EP thermoset to 32.2% and V-0, with a ~32.2% decrease in the peak smoke production rate (PSPR). Compared with the unmodified EP sample, the tensile strength, elongation at break and impact strength of EP sample with 3 wt% PB are elevated by ~29.8%, ~37.7% and ~50.2%, respectively. Meanwhile, high glass transmission temperature and transparency are maintained. Hence, this work offers an integrated strategy to develop highly efficient multifunctional polyphosphonamides for the preparation of high-performance flame-retardant and smoke-suppressive EPs combining high mechanical strength and toughness, thermal resistance and transparency, which are expected to meet the increasingly rigorous industrial requirements.


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Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Faculty/School / Institute/Centre: Current - Institute for Advanced Engineering and Space Sciences - Centre for Future Materials (1 Jan 2017 -)
Faculty/School / Institute/Centre: Current - Institute for Advanced Engineering and Space Sciences - Centre for Future Materials (1 Jan 2017 -)
Date Deposited: 29 Nov 2021 23:02
Last Modified: 01 Dec 2021 01:59
Uncontrolled Keywords: Boron-derived polyphosphonamide; Epoxy; Flame-retardancy; Higher efficiency; Mechanical; Performance; Property; Resin samples; Smoke suppression; Thermal
Fields of Research (2008): 09 Engineering > 0912 Materials Engineering > 091202 Composite and Hybrid Materials
03 Chemical Sciences > 0303 Macromolecular and Materials Chemistry > 030306 Synthesis of Materials
09 Engineering > 0912 Materials Engineering > 091205 Functional Materials
Fields of Research (2020): 34 CHEMICAL SCIENCES > 3403 Macromolecular and materials chemistry > 340302 Macromolecular materials
40 ENGINEERING > 4016 Materials engineering > 401605 Functional materials
40 ENGINEERING > 4016 Materials engineering > 401602 Composite and hybrid materials
Socio-Economic Objectives (2008): E Expanding Knowledge > 97 Expanding Knowledge > 970109 Expanding Knowledge in Engineering
E Expanding Knowledge > 97 Expanding Knowledge > 970103 Expanding Knowledge in the Chemical Sciences
Socio-Economic Objectives (2020): 28 EXPANDING KNOWLEDGE > 2801 Expanding knowledge > 280105 Expanding knowledge in the chemical sciences
28 EXPANDING KNOWLEDGE > 2801 Expanding knowledge > 280110 Expanding knowledge in engineering
Funding Details:
Identification Number or DOI: https://doi.org/10.1016/j.cej.2021.131578
URI: http://eprints.usq.edu.au/id/eprint/44076

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