天津工业大学学报2025，Vol.44Issue(2)：23-28,36,7.DOI:10.3969/j.issn.1671-024x.2025.02.004
基于白石墨基阻燃剂的PVC复合材料阻燃抑烟改性
Flame retardancy and smoke suppression modification of PVC composite materials based on white graphite-based flame retardant
摘要
Abstract
In order to solve the problem of releasing toxic smoke and poor flame retardancy during pyrolysis or combustion of PVC,a white graphite-based flame retardant BN-GP-PMA was designed and synthesized based on Lewis acid-base theory.Namely,boron nitride(BN),known as"white graphite",was modified with guanidine phos-phate(GP)and phosphomolybdate hydrate(PMA).PVC composites were prepared by blending modification method.The structural composition of flame retardant was investigated using Fourier transform infrared spec-troscopy and X-ray photoelectron spectroscopy.The thermal stability and flame retardancy of PVC composite materials were analyzed using thermogravimetric analyzer,critical oxygen index analyzer and cone calorimeter.The flame retardancy mechanism was speculated.The results showed that the limiting oxygen index(LOI)of BN-GP-PMA/PVC composite material with 6.5％of flame retardant was 28.5％,which was 14.0％higher than that of pure PVC(25％).The peak heat release rate,total heat release,and total smoke production of BN-GP-PMA/PVC composite materials decreased by 28.6％,24.1％,and 13.1％compared with those of pure PVC,re-spectively.The residual char content of BN-GP-PMA/PVC composite material under nitrogen atmosphere at 800 ℃increased by 179.7％compared with that of pure PVC.The above data indicate that the white graphite-based flame retardant BN-GP-PMA endows PVC with good flame retardancy and smoke suppression performance.关键词
聚氯乙烯(PVC)复合材料/氮化硼(BN)/白石墨基阻燃剂/抑烟改性Key words
polyvinyl chloride composite materials/boron nitride/white graphite-based flame retardant/smoke suppres-sion modification分类
化学化工引用本文复制引用
刘晓辉,李迪,张秋艳..基于白石墨基阻燃剂的PVC复合材料阻燃抑烟改性[J].天津工业大学学报,2025,44(2):23-28,36,7.基金项目
福建省工业科技专项项目(2021HZ027022) （2021HZ027022）
