文献类型：期刊文献

英文题名：POSS-modified ammonium polyphosphate for improving flame retardant of epoxy resins

作者：Feng, Yanling[1];Wu, Wei[1];Wang, Zhengyi[1];Zhao, Tianyu[1]

机构：[1]East China Univ Sci & Technol, Sino German Joint Res Ctr Adv Mat, Sch Mat Sci & Engn, Shanghai 200237, Peoples R China

年份：2022

卷号：33

期号：4

起止页码：1190

外文期刊名：POLYMERS FOR ADVANCED TECHNOLOGIES

收录：;EI(收录号：20220311477496);WOS:【SCI-EXPANDED(收录号:WOS:000740875200001)】；

基金：Authors thank the supported by the Chinese German Centre for the Promotion of Science via the National Natural Science Foundation of China (NSFC) and Deutsche Forschungsgemeinschaft (DFG) Grant Number: GZ1448.

语种：英文

外文关键词：APP; EP; flame retardant; OGPOSS

摘要：An innovative phosphorus-silicone flame retardant (KAPP-OGPOSS) was prepared by grafting octa (propyl glycidyl ether) polyhedral oligomeric silsesquioxane (OGPOSS) on ammonium polyphosphate (APP) through silane coupling agent (KH-550). The chemical structure, morphology, flame retardancy, and mechanism of the obtained materials were comprehensively investigated. TG results demonstrated that EP with 15 wt% KAPP-OGPOSS produced a char residue of 42.6% at 700 degrees C, which is three times that of pure EP. The flame retardant tests showed that the limiting oxygen index value of EP/15 wt% KAPP-OGPOSS was 30.6% (67.7% higher than that of neat EP) and its UL-94 grade reached to V-0 rating. Cone calorimeter testing indicated that the incorporation of 15 wt% KAPP-OGPOSS to EP significantly reduced heat, smoke, CO, and CO2 release by 79%, 83%, 80%, and 82.5%, respectively. The modification of APP with OGPOSS was also beneficial for the improvement of the char yield and density of char. A flame retardant mechanism was revealed according to the investigation into the char residue. This modified approach provided an innovative yet practical means of enhancing the flame retardant properties of EP.