Regulating the Localization of Intumescent Flame Retardant for Improving the Flame Retardancy of Ethylene-vinyl Acetate Copolymer Using Polyamide 6 as a Charring Agent  

作　　者：高喜平 ZHAO Pan YAO Dahu 陆昶 YUE Ruiheng SHENG Qi GAO Xiping;ZHAO Pan;YAO Dahu;LU Chang;YUE Ruiheng;SHENG Qi(School of Chemical Engineering&Pharmaceutics,Henan University of Science and Technology,Luoyang 471023,China)

机构地区：[1]School of Chemical Engineering&Pharmaceutics,Henan University of Science and Technology,Luoyang 471023,China

出　　处：《Journal of Wuhan University of Technology(Materials Science)》2023年第3期701-711,共11页武汉理工大学学报（材料科学英文版）

基　　金：the National Natural Science Foundation of China (No.51673059);the Science and Technology Planning Project of Henan Province (No. 212102210636);the Opening Project of Jiangxi Province Key Laboratory of Polymer Micro/Nano Manufacturing and Devices (East China University of Technology)。

摘　　要：Polyamide 6 (PA6) was employed as a charring agent of intumescent flame retardant (IFR) to improve the flame retardancy of ethylene-vinyl acetate copolymer (EVA). Different processing procedures were used to regulate the localization of IFR in the EVA matrix. Localizations in which IFR was dispersed in the PA6phase or in the EVA phase were prepared. The effect of the localization of IFR on the flame retardancy of EVA was investigated. The limited oxygen index (LOI), vertical burning (UL 94) and cone calorimeter test (CCT)showed that the localization of IFR in the EVA matrix exhibited a remarkable influence on the flame retardancy.Compared with EVA/IFR, a weak improvement in the flame retardancy was observed in the EVA/PA6/IFR blend withthe localization of IFR in the PA6 phase. When IFR was regulated from the PA6 phase to the EVA matrix,a remarkable increase in the flame retardancy was exhibited. The LOI was increased from 27.8%to 32.7%, and the UL 94 vertical rating was increased from V-2 to V-0. Moreover, an approximately 41.36%decrease in the peak heat release rate was exhibited. A continuous and compact intumescent charring layer that formed in the blends with the localization of IFR in the EVA matrix should be responsible for its excellent flame retardancy.

关 键 词：intumescent flame retardant charring agent LOCALIZATION polyamide 6 ethylene vinyl acetate 

分 类 号：TQ334[化学工程—橡胶工业]