树脂包覆法阻燃EPS泡沫塑料的制备及其燃烧性能的表征  

Preparation and Characterization of Flame Retardant EPS Foams Coated with Melamine-formaldehyde Resin

作　　者：李玉玲[1] 谷晓昱[1] 刘喜山[1] 董明哲[1] 张胜[1] 

机构地区：[1]北京化工大学碳纤维及功能高分子教育部重点实验室,北京100029

出　　处：《中国塑料》2013年第1期67-73,共7页China Plastics

摘　　要：探索了制备可发性聚苯乙烯(EPS)的工艺流程和参数,研究了三聚氰胺甲醛树脂(MF)预聚体包覆聚磷酸铵(APP)以及硼酸锌(ZB)对EPS泡沫的阻燃性能的影响,分别使用极限氧指数测试和热失重分析对其燃烧性能和热稳定性进行了表征。结果表明,包覆阻燃可以明显提高EPS泡沫塑料的阻燃性能,极限氧指数由18.0%提高到22.6%,残炭量提高了85.0%,遇火收缩的现象得到显著改善,燃烧速度可减小51.7%。加入ZB可以进一步提高成炭量和炭层的强度,从而进一步提高阻燃性能。The technological process and parameters of preparing expandable polystyrene （EPS） in laboratory scale were investigated. The foaming performances of EPS foam coated with pre- polymer of melamine-formaldehyde （MF） together with ammonium polyphosphate and zinc borate （ZB） were characterized. The flammability and the thermal properties were evaluated using limiting oxygen index （LOI） test and thermogravimetric analysis （TGA）, respectively. It indicated that coating was an effective method to improve the flame retardancy of EPS foams： the LOI value was increased from 18. 0 % to 22. 6 % the char residue increased 85 % shrinkage was significantly reduced during burning process~ combustion rate was also reduced to 51.7 %. The presence of ZB which acted as a dehydration catalyzer, could increase both the amount and strength of char residue and hence further improved the flame retardancy.

关 键 词：可发性聚苯乙烯 三聚氰胺甲醛树脂预聚体 包覆 阻燃 

分 类 号：TQ328[化学工程—合成树脂塑料工业]