摘要
采用聚氨酯(PU)为囊材,聚磷酸铵(APP)为芯材制备了微胶囊阻燃剂(MAPP)。通过溶解度测试、傅里叶红外光谱(FTIR)和扫描电镜(SEM)对微胶囊的核壳结构进行了表征。采用氧指数法、垂直燃烧法和SEM考察了APP和MAPP对PP的阻燃效果。结果表明:与APP相比,MAPP溶解度明显下降,FITR和SEM测试表明APP被PU包覆了;通过SEM观察MAPP/PP体系在燃烧后能生成更加连续和致密的炭层,有效地保护了炭层下的材料。在聚丙烯复合材料中,当APP和MAPP添加量相同时(30%),LOI值从22.0%提高到32.0%,且UL-94达到V-0级。
Microencapsulated ammonium polyphosphate （MAPP） was prepared with the shell of polyurethane （PU） and core of ammonium polyphosphate. The ＂core/shell-like＂ structure of MAPP were characterized by water solubility, Fourier transform infrared spectroscopy （FTIR） and scanning electron microscopy （SEM）. The flame retardant action of MAPP and APP in PP were studied using SEM, limiting oxygen index （LOI） and UL- 94. Water solubility tests indicate that water solubility of MAPP decreases greatly than un-microencapsulated APP. FITR and SEM showed that APP was encapsulated by a layer of PU. The results of SEM indicated that MAPP/PP could promote the formation of compact charred residues which effectively protected the underlying polymer from burning. The limiting oxygen index （LOI） value of the PP/MAPP at the same loading was higher than the value of PP/APP and could enhance the LOI value from 22.0% to 32.0% and UL- 94 ratings of PP/MAPP could reach V-0 at 30 % loading.
出处
《塑料》
CAS
CSCD
北大核心
2016年第4期46-49,共4页
Plastics
基金
河北省自然科学基金(E2014209280)
关键词
微胶囊化
聚磷酸铵
聚氨酯
聚丙烯
阻燃
microencapsulation
ammonium polyphosphate
polyurethane
polypropylene
retardant
