可发性聚苯乙烯无卤阻燃泡沫材料制备及性能

Preparation and Properties of Halogen Free Flame Retardant Expandable Polystyrene Foams

摘要:

采用包覆法，将含有无卤阻燃剂的热固性酚醛树脂胶包覆在预发泡的可发性聚苯乙烯(EPS)珠粒表面，再通过水蒸气发泡、模压成型工艺制备出无卤阻燃EPS泡沫材料.研究了3种无卤阻燃剂(三聚氰胺磷酸盐、三聚氰胺氰尿酸盐和聚磷酸铵)在EPS泡沫材料中的阻燃作用，探讨了聚磷酸铵用量对EPS泡沫材料阻燃性能、力学性能和隔热性能的影响.结果表明，在3种无卤阻燃EPS泡沫材料中，采用聚磷酸铵与酚醛树脂包覆制备的无卤阻燃EPS泡沫材料综合性能最好.当EPS、酚醛树脂和聚磷酸铵质量比为100∶100∶40时，无卤阻燃EPS泡沫材料的综合性能较好，其压缩强度为042MPa，弯曲强度为070MPa，氧指数(体积分数)为305%，导热系数为00256W·m-1·K-1.

Abstract:

Expandable polystyrene(EPS) beads after pre expansion, were blended with the mixture of thermosetting phenol formaldehyde(PF) resin and halogen free flame retardants, and then foamed and molded by water vapor to prepare flame retarded EPS foams. Flame retardancy and mechanical properties of three halogen free flame retardants, i.e. melamine phosphate, melamine cyanurate and ammonium polyphosphate(APP) in EPS foams was studied, and it is found that the EPS foam coated with the mixture of PF resin and APP has good comprehensive performance among the three flame retardants. Effect of APP loadings on flame retardant, mechanical and thermal insulative properties of the EPS foams was also studied. It is observed that the flame retardant EPS foam at a mass ratio of EPS/phenolic resin/APP=100∶100∶40 has good comprehensive properties, i.e. compression strength 042MPa, flexural strength 070MPa, limiting oxygen index 305%, and thermal conductivity 00256W·m-1·K-1.