A hyperbranched P/N/B-containing oligomer as multifunctional flame retardant for epoxy resins

Huo, Siqi and Sai, Ting and Ran, Shiya and Guo, Zhenghong and Fang, Zhengping and Song, Pingan ORCID: https://orcid.org/0000-0003-1082-652X (2022) A hyperbranched P/N/B-containing oligomer as multifunctional flame retardant for epoxy resins. Composites Part B: Engineering, 234:109701. pp. 1-12. ISSN 1359-8368


Abstract

Flame-retardant epoxy resins (EPs) with superior optical, mechanical and dielectric properties are highly desired in high-tech industries. In this work, a multifunctional hyperbranched additive (BDHDP) was synthesized for EPs. Our results showed that BDHDP catalyzed the curing of epoxy resin because of its tertiary amine and hydroxyl groups. At a low addition level (<3.0 wt%), BDHDP increased the glass-transition temperature and maintained the optical transmittance of epoxy thermoset. Meanwhile, BDHDP improved the mechanical strength and toughness, and reduced the dielectric constant and loss of EP because of the rigid phosphaphenanthrene groups and intra-molecular cavities. Moreover, BDHDP reduced the heat release and smoke generation during the EP combustion. Adding 1.5 wt% of BDHDP led to a UL-94 V-0 rating, and reduced the total smoke production by 16.4%. Hence, this study offers an effective method to create transparent EP thermosets with outstanding mechanical, dielectric and fire-retardant properties via incorporating a P/N/B-containing hyperbranched oligomer.


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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 – Faculty of Health, Engineering and Sciences - School of Agriculture and Environmental Science (1 Jan 2022 -)
Date Deposited: 24 Mar 2022 02:41
Last Modified: 23 Sep 2022 04:17
Uncontrolled Keywords: Epoxy resin; Hyperbranched oligomer; Fire safety; Mechanical properties; Dielectric performances
Fields of Research (2020): 40 ENGINEERING > 4016 Materials engineering > 401605 Functional materials
40 ENGINEERING > 4016 Materials engineering > 401609 Polymers and plastics
40 ENGINEERING > 4016 Materials engineering > 401602 Composite and hybrid materials
Socio-Economic Objectives (2020): 24 MANUFACTURING > 2409 Industrial chemicals and related products > 240908 Organic industrial chemicals (excl. resins, rubber and plastics)
24 MANUFACTURING > 2409 Industrial chemicals and related products > 240904 Fine chemicals
24 MANUFACTURING > 2409 Industrial chemicals and related products > 240911 Resins
Funding Details:
Identification Number or DOI: https://doi.org/10.1016/j.compositesb.2022.109701
URI: http://eprints.usq.edu.au/id/eprint/47391

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