文献类型：期刊文献

英文题名：Novel eco-friendly maleopimaric acid based polysiloxane flame retardant and application in rigid polyurethane foam

作者：Wang, Shibo[1,2] Yang, Xinxin[1] Li, Zhaoshuang[1] Xu, Xu[2] Liu, He[1] Wang, Dan[1] Min, Huihua[2] Shang, Shibin[1]

第一作者：Wang, Shibo

通信作者：Liu, H[1];Wang, D[1];Xu, X[2]|[a000598870cdaa2acac5b]王丹;

机构：[1]Chinese Acad Forestry, Coinnovat Ctr Efficient Proc & Utilizat Forest Re, Key Lab Chem Engn Forest Prod,Natl Forestry & Gra, Key Lab Biomass Energy & Mat,Inst Chem Ind Forest, Nanjing 210042, Jiangsu, Peoples R China;[2]Nanjing Forestry Univ, Coll Chem Engn, Coinnovat Ctr Efficient Proc & Utilizat Forest Re, Electron Microscope Lab,Jiangsu Prov Key Lab Chem, Nanjing 210037, Jiangsu, Peoples R China

年份：2020

卷号：198

外文期刊名：COMPOSITES SCIENCE AND TECHNOLOGY

收录：;EI(收录号：20202708890254);Scopus(收录号：2-s2.0-85087107117);WOS:【SCI-EXPANDED(收录号:WOS:000568996000007)】；

基金：This work was supported by the National Key Research and Development Program of China (2018YFD0600402); and National Natural Science Foundation of China (31570562).

语种：英文

外文关键词：Functional composites; Thermal properties; Scanning electron microscopy; Thermogravimetric analysis; Flame retardancy

摘要：Polysiloxane flame retardants have been widely studied because of their high heat resistance and nontoxicity. The flame retardant efficiency may be further improved by inhibiting the release of cyclic siloxanes during combustion. In this study, a novel flame retardant was synthesised by imidisation of an amino-polysiloxane using biorenewable resource-maleopimaric acid (MPA). The MPA inhibits the conversion of polysiloxane to cyclic siloxane, thereby enhancing thermal stability. The synthesised flame retardant was employed as a part of the soft segment to produce rigid polyurethane foam (RPUF) by a "one-pot" process. The rigid MPA and imide groups inhibit the "back-bite" of polysiloxane and promote the formation of a silica-rich hybrid char layer on the backbone of RPUF to reduce flammability. Compared with pure RPUF, the minimum oxygen concentration necessary to support the combustion of modified foam increased by 39.7%, and the peak heat release rate (PHRR) of modified RPUF decreased by more than 50%. Simultaneously, the imide groups and the rigid hydrogenated phenanthrene ring of MPA improved the compressive strength of polysiloxane-modified RPUF. The technique to synthesise a highly effective polysiloxane flame retardant for RPUF is given herein.