在三聚氰胺(ME)和氰尿酸(CA)分子自组装合成三聚氰胺氰尿酸盐(MCA)的过程中加入二乙基次磷酸铝(ADEPH)合成一种改性MCA,磷-氮协同阻燃剂MCA-ADEPH,并对其结构进行表征;在尼龙6(PA6)中加入MCA和改性MCA,通过熔融共混的方法制备无卤阻燃PA6/MCA和PA6/MCA-ADEPH复合材料,并研究其阻燃性能和力学性能.结果表明,MCA-ADEPH中ADEPH对MCA只是物理改性,ADEPH可细化MCA粒径;MCA-ADEPH可提高PA6/MCA的阻燃性能,MCA和ADEPH可从气相和凝聚相协同阻燃PA6;在提高PA6阻燃性能的同时,PA6的力学性能并没有下降.
A phosphorus-nitrogen synergistic flame retardant,MCA-ADEPH,was synthesized through adding ADEPH into the reaction between ME and CA,and its chemical structure was characterized.The halogen-free flame retarded PA6/MCA and PA6/MCA-ADEPH composites were prepared by melt blending of flame retardant and PA6,and their flame retardancy and mechanical properties were studied.The results showed that there is no chemical reaction between MCA and ADEPH,and the addition of ADEPH can make the size of MCA particles become smaller.MCA-ADEPH can improve the flame retardancy of PA6 from both gas and condensed phase.What''s more,the excellent mechanical properties are kept while the flame retardancy is improved.
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