MG-MUF包覆阻燃EPS泡沫及力学性能研究

采用经Hummers法制成的改性石墨(MG)为阻燃成分，让其与经聚乙烯醇改性的脲醛树脂(MUF)进行原位插层聚合，得到的MG-MUF作为可发性聚苯乙烯(EPS)的包覆阻燃剂。选用最佳预发泡工艺处理的EPS珠粒为芯材，包覆剂在一定含量的复合型固化剂作用下与EPS珠粒共混，经热蒸汽膨胀模压成型。对包覆样板进行阻燃性能、保温性能和力学性能测试。结果表明，阻燃剂MG含量为20 %、包覆比为3：1的样板的极限氧指数为30.5 %，而其水平燃烧等级达HF1级，综合性能较好。

Flame Retardancy and Mechanical Properties of EPS Foams Coated with MG-MUF

Modified graphite (MG) was prepared by Hummers method, which was introduced into PVA modified urea formaldehyde resin (MUF) by in situ intercalation polymerization. The obtained compound resin MG MUF was used as coating of pre expanded polystyrene (EPS) beads. The coated beads were thermally pressed into templates, whose flame retardantcy, thermal insulation properties, and mechanical strength were characterized. When MG in MG MUF was 20 % and the coat ratio was 3：1, the limiting oxygen index of retardant templates reached 30.5 %, the horizontal burning grade of the template was HF-1.