文献类型：期刊文献

英文题名：Flame Retardancy and Mechanism of Novel Phosphorus-Silicon Flame Retardant Based on Polysilsesquioxane

作者：Zhu, Shengjie[1,2];Gong, Weiguang[1,2];Luo, Ji[1,2];Meng, Xin[1];Xin, Zhong[1,2];Wu, Jie[1,2];Jiang, Zewen[1,2]

机构：[1]East China Univ Sci & Technol, Shanghai Key Lab Multiphase Mat Chem Engn, Sch Chem Engn, Shanghai 200237, Peoples R China;[2]East China Univ Sci & Technol, Prod Engn Dept, Sch Chem Engn, Shanghai 200237, Peoples R China

年份：2019

卷号：11

期号：8

外文期刊名：POLYMERS

收录：;EI(收录号：20193207286144);WOS:【SCI-EXPANDED(收录号:WOS:000484552900074)】；

基金：The authors are grateful for the financial support of the National Natural Science Funds of China (Grant No. 21576086) and the Fundamental Research Funds for the Central Universities (22A1817025).

语种：英文

外文关键词：PLA; flame retardancy; phosphorus-silicon synergism; mechanism

摘要：A novel phosphorus-silicon flame retardant (P(5)PSQ) was prepared by bonding phosphate to silicon-based polysilsesquioxane (PSQ) and used as flame retardant of poly (lactic acid) (PLA). The results show that PLA with 10 wt % P(5)PSQ has a limiting oxygen index (LOI) 24.1%, the peak heat release rate (PHRR) and total heat release (THR) of PLA decrease 21.8% and 25.2% compared to neat PLA in cone calorimetric test, indicating that P(5)PSQ shows better flame retardancy in comparison to PSQ. Furthermore, the study for the morphology and composition of carbon residue after the combustion of PLA and the gas release of PLA during combustion illustrate that P(5)PSQ has flame retardancy in condensed phase and gas phase simultaneously. In condensed phase, phosphorus from phosphate promotes the formation of more stable and better carbon layer containing Si and P, which inhibits the transfer of heat and oxygen in the combustion. In gas phase, the phosphate in P(5)PSQ emits phosphorus-containing compound that can restrain the release of C-O containing products, which may have effective flame retardancy for PLA in gas phase to a certain extent. In one word, P(5)PSQ is denoted as a good phosphorus-silicon synergistic flame-retardant.