文献类型：期刊文献

英文题名：Co-based metal-organic framework with phosphonate and triazole structures for enhancing fire retardancy of epoxy resin

作者：Yang, Xingwen[1];Zhao, Liang[1];Peng, Fei[1];Zhu, Yun[1];Wang, Guiyou[1]

机构：[1]East China Univ Sci & Technol, Sch Mat Sci & Engn, Shanghai Key Lab Adv Polymer Mat, Shanghai 200237, Peoples R China

年份：2021

卷号：193

外文期刊名：POLYMER DEGRADATION AND STABILITY

收录：;EI(收录号：20213810923071);WOS:【SCI-EXPANDED(收录号:WOS:000703743600008)】；

基金：The authors gratefully acknowledge the financial support from Shanghai Brightfield Chemicals Co. Ltd., China. The authors wish to thank Dr. Yun Ding and Dr. Aiguo Hu for their kindly assistance.

语种：英文

外文关键词：Metal-organic framework; Epoxy resin; Flame retardant; Smoke suppression; Physical properties

摘要：A phosphonate and triazole containing binary carboxylic acid ligand was synthesized via azide-alkyne "click" reaction, which was further coordinated with cobalt nodes to form metal-organic framework (MOF) containing two important fire retardant elements, phosphorus and nitrogen (PN-MOF). With the loading of 6 wt% PN-MOF in epoxy resin (EP), the peak heat release rate, average heat release rate, total heat release, and total smoke production of EP/PN-MOF composites dramatically decreased by 44.6%, 52.9%, 44.0% and 36.2%, respectively. Meanwhile, the limiting oxygen index increased from 24.3% to 29.8%. Thanks to the excellent catalytic activity of PN-MOF in carbonation and oxidation, the release of toxic gasses from the composites was significantly reduced, particularly, the production of CO was decreased by 48% in comparison with neat EP. In addition, the glass transition temperature and modulus of EP/PN-MOF composites were increased, suggesting a strong interfacial interaction between PN-MOF and EP matrix. Overall, this research provides an efficient strategy for the preparation of MOF-type flame retardant to simultaneously enhance the flame retardancy and physical properties of polymeric materials. (C) 2021 Elsevier Ltd. All rights reserved.