摘要
通过筛选复配,组成了以三聚氰胺氰尿酸盐(MCA)为气源、聚磷酸铵(APP)为酸源的化学膨胀复配阻燃体系,用于对(乙烯/乙酸乙烯酯)共聚物(E/VAC)进行阻燃改性。通过极限氧指数(LOI)测试、垂直燃烧实验研究了MCA/APP协同阻燃作用对E/VAC燃烧性能的影响;并运用光学显微镜(OL)、扫描电子显微镜(SEM)和傅立叶变换红外光谱(FTIR)等分析手段对阻燃E/VAC体系燃烧后的结构进行了分析。结果表明,随着APP在MCA/APP体系中比例的增加,阻燃E/VAC的LOI由25.2%提高到28.3%;当MCA/APP配比为1.8∶1时,阻燃E/VAC的燃烧等级可以达到FV-0级;燃烧试样膨胀层的OL分析表明,随着MCA在MCA/APP体系中比例的增加,其膨胀层横截面处的孔洞增多、孔径变大,证明燃烧时形成了良好的膨胀和隔热层;燃烧试样炭层的OL和SEM分析表明,随着APP在MCA/APP体系中比例的增加,燃烧试样形成了具有良好阻燃效果的多孔泡沫状炭层;FTIR分析表明,阻燃E/VAC试样燃烧时发生脱水炭化现象。
The chemical intumescent flame retardant system was prepared with E/VAC as matrix, MCA as gas source, APP as acid source. The flame retardance of system was studied by limiting oxygen index（LOI） and vertical burning method, and the structure of char forming was analyzed by OL, SEM and FTIR. The results showed that with the increasing of APP ratio, the LOI values of composites increased from 25.2% to 28.3% ; when the ratio of MCA/APP reached to 1.8, the flammability came up to FV -0 by the vertical burning test. The analysis of OL and SEM indicated that charred layers appeared more compact with increasing of APP. It was also found that the apertures of composites increased, and the dimension of the apertures was larger than before with the increasing of MCA. The result of FTIR showed that the system appeared dehydrating and charring.
出处
《工程塑料应用》
CAS
CSCD
北大核心
2008年第4期51-54,共4页
Engineering Plastics Application
