摘要
采用原位聚合方法制备出三聚氰胺-甲醛树脂(密胺树脂)微胶囊化聚磷酸铵(MCAPP),并用电子能谱等手段对其表征。结果表明,聚磷酸铵经过微胶囊化后在水中溶解度大大降低。与APP相比,MCAPP在EVA中的阻燃性能有较大提高。当MCAPP与季戊四醇(PER)或双季戊四醇(DPER)以一定比例复配时,其EVA/MCAPP/PER或EVA/MCAPP/DPER复合材料的氧指数进一步提高,而且该三元复合材料的垂直燃烧性能能够达到UL-94 V-0级。TG实验发现,MCAPP的初始分解温度与APP的差不多;EVA/MCAPP复合材料的热稳定性要比EVA/APP复合材料的热稳定性有所提高。
Mieroencapsulated ammonium polyphosphate （MCAPP） with a melamine-formaldehyde （MF） resin coating layer was prepared by in situ polymerization, and characterized by XPS and solubility test. The results show that the microencapsulation of APP leads to a great decrease in its water solubility. The flame retardant properties of MCAPP and APP in combination with pentaerythritol （PER） or dipentaerythritol （DPER）, respectively in EVA were studied using LOI and UL 94 test. Their thermal stability was evaluated by TG. The LOI value of the EVA/MCAPP composite at 40 % loading is 28%, whereas the corresponding value of the EVA/APP composite is only 22%. Moreover, the LOI values of the EVA/MCAPP/DPER composites are a bit higher than the ones of the EVA/MCAPP/PER composites. In the UL 94 test, the EVA/MCAPP/PER and EVA/MCAPP/DPER composites with suitable ratios of MCAPP to PER （or DPER） can reach the V- 0 rating. TG results indicate that the initial decomposition temperatures of APP and MCAPP are all about 270 ℃. The thermal stability of EVA/MCAPP composites is improved compared with that of EVA/APP composites.
出处
《高分子材料科学与工程》
EI
CAS
CSCD
北大核心
2008年第12期82-85,共4页
Polymer Materials Science & Engineering
基金
国家自然科学基金资助项目(20776136)
同济大学"985"科技创新平台基金资助课题
关键词
聚磷酸铵
微胶囊化
EVA
膨胀型阻燃
热分解
ammonium polyphosphate
microencapsulation
EVA
intumescent flame retardation
thermal degradation
