磷系阻燃剂是阻燃效率较高的一类无卤阻燃剂,但同时存在易吸水,与基体相容性差,热稳定性不好等缺点.微胶囊化是近年来克服这些缺点的有效途径.通过分子设计不同的囊壳对阻燃剂进行微胶囊化改性,不仅可以改善阻燃剂的物理性质,还可以提高阻燃材料的阻燃性能.文中介绍了三聚氰胺-甲醛树脂、聚氨酯、环氧树脂、有机硅以及纤维素等不同囊壳材料对微胶囊化的阻燃剂及阻燃复合材料性能的影响,研究表明微胶囊化改性后的阻燃剂的耐水性、热稳定性与基体的相容性以及阻燃材料的力学性能均得到有效的提高.
Phosphorus-containing flame retardants are one type of effective halogen-free flame retardants.However,they have some problems such as moisture sensitivity and poor compatibility with polymer matrix and low thermal stability.Microencapsulation of phosphorus-containing flame retardant is an effective way to solve these problems.The microencapsulation of flame retardant by designing various molecular structure could not only improve physical properties of flame retardant,but also increase the flame retardancy of polymer.In this paper,the influence of different microencapsule shell materials including melamine-formaldehyde resin,polyurethane,epoxy resin,organic silicon and cellulose on the flame retardancy and physical properties flame retarded composites were introduced.The results demonstrated that microencapsulation of phosphorous flame retardant improved the water resistance,thermal stability,compatibility with matrix of flame retardants and mechanical properties of flame retarded materials.
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