P（AN-co-MA-co-MMA）@H2O微胶囊/密胺高阻燃泡沫的制备及性能

Preparation of P（AN-co-MA-co-MMA）@H2O Microcapsule/Melamine Resin Foam with High Flame Resistance and Its Properties

本实验采用常压反相悬浮聚合法制备P(AN-co-MA-co-MMA)@H2O微胶囊发泡剂,并进一步制备P(AN-co-MA-co-MMA)@H2O/密胺泡沫复合材料。同时研究了P(AN-co-MA-co-MMA)@H2O/密胺泡沫复合材料的表观密度、泡孔结构、闭孔率、阻燃性能、压缩强度等。比较了P(AN-co-MA-co-MMA)@H2O/密胺泡沫复合材料分别以异辛烷、异辛烷微胶囊为发泡剂制备的密胺泡沫的性能。结果表明,P(AN-co-MA-co-MMA)@H2O微胶囊/密胺泡沫复合材料的表观密度为30kg/m3;物理性能良好,闭孔率达91%,吸水率为92%;压缩强度为143kPa。此外,P(AN-co-MA-co-MMA)@H2O微胶囊/密胺泡沫复合材料的极限氧指数(36%)明显高于异辛烷密胺泡沫和异辛烷微胶囊/密胺泡沫复合材料的极限氧指数(分别为29%和28%)。P(AN-co-MA-co-MMA)@H2O微胶囊/密胺泡沫燃烧后的残留量为10%,明显高于其他两种密胺泡沫。

P(AN-co-MA-co-MMA)@H2O microcapsule foaming agent was synthesized via inverse suspension polymerization under constant pressure, and then P(AN-co-MA-co-MMA)@H2O microcapsule/melamine resin foam composite material was further obtained. Specifically, the apparent density, foam structure, closed porosity, flame retardancy and compressive strength of the prepared composite material were studied in detail. In addition, the comparison in properties between the prepared composite material and melamine foams synthesized by using isooctane and isooctane microcapsules as foaming agents was conducted. It can be found from the results that the P(AN-co-MA-co-MMA)@H2O microcapsule/melamine resin foam with an apparent density of 30 kg/m^3 was acquired, and it exhibited amazing physical properties with closed porosity of 91%, water absorption of 92% and compressive strength of 143 kPa. Besides, the limit oxygen index (LOI) of P(AN-co-MA-co-MMA)@H2O microcapsule/melamine resin foam (36%) presented a remarkable increase compared with that of isooctane melamine foam (29%) and isooctane microcapsule/melamine foam composite (28%). Moreover, the residual amount of the composite material after combustion was 10%, which is obviously higher than that of the other two kinds of melamine foam.