文献类型：期刊文献

英文题名：The Evolution of Intumescent Char in Flame-Retardant Coatings Based on Amino Resin

作者：Song, Wei[1] Wu, Muting[1] He, Yanrong[1] Wu, Yuzhang[1] Qu, Wei[1]

第一作者：Song, Wei

通信作者：Qu, W[1]

机构：[1]Chinese Acad Forestry, Res Inst Wood Ind, Xiangshan Rd, Beijing 100091, Peoples R China

年份：2021

卷号：11

期号：6

外文期刊名：COATINGS

收录：;Scopus(收录号：2-s2.0-85108676944);WOS:【SCI-EXPANDED(收录号:WOS:000667837700001)】；

基金：This research was funded by the National Natural Science Foundation of China (No. 31890772, 31600456, and 31570549).

语种：英文

外文关键词：intumescent flame-retardant coatings; intumescent char; char formation; shrinkage; pore size distribution

摘要：Intumescent flame-retardant (IFR) coatings have been gaining more attention. The behaviors of intumescent char in IFR coatings play the most important role in its flame-retardant properties. However, the evolution of intumescent char throughout the whole process of protection is still unclear. In this study, both the formation and shrinkage of char were studied. The formulation of IFR includes melamine modified urea-formaldehyde resin (MUF), ammonium polyphosphate (APP) and pentaerythritol (PER). The flame-retardant properties of the coating were measured by the cone calorimeter (CONE). The evolution of the volume and the pore size distribution of char were monitored. The morphological and chemical structures were characterized by the scanning electron microscopy (SEM) and Fourier transform infrared spectroscopy (FTIR). The results show that the evolution of intumescent char could be divided into three stages. More than 50% shrinkage of char occurs in the second stage. There are obvious transformations of the morphological and chemical structures of char between the different stages.