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欧红香教授课题组在 “Journal of Applied Polymer Science”发表研究论文

   发布时间: 2020-03-17    访问次数: 10

二氧化硅包覆聚磷酸铵制备新型膨胀阻燃聚乙烯复合材料

Investigation of novel intumescent flame retardant lowdensity polyethylene based on SiO2@MAPP and double pentaerythritol

Xu Jiacheng, Ou Hongxiang, Shan Xueying, Liu Ben, Jiang Juncheng, Xu Guoguang

Journal of Applied Polymer Science, 16 March 2020, DOI: DOI: 10.1002/app.49242

 Abstract: To improve the flame-retardant property of low-density polyethylene (LDPE) composites, a novel intumescent flame retardant (IFR) consisting of ammonium polyphosphate (APP) covered by silicon dioxide and 3-(Methylacryloxyl) propyltrimethoxy silane (KH-570) (SiO2@MAPP) and double pentaerythritol (DPER) was synthesized. Various methods were applied to structural characterization and property investigations of different samples. The results indicated that the solubility of APP decreased after coating with silicon dioxide (SiO2) and KH-570. The flame retardancy of LDPE composites was improved with addition of IFR containing SiO2@MAPP/DPER. With 30 wt% addition of IFR containing SiO2@MAPP /DPER, the limiting oxygen index reached 26.8% and the tensile strength was 3.30 MPa. The tensile strength was 7.14% higher than that of 30 wt% IFR without SiO2@MAPP. The smoke density test showed that the flue gas emission was obviously improved. The addition of SiO2@MAPP effectively increased the residual carbon content of composites and thermal stability of the composites.