6叶士兵等无卤阻燃增强PA66/PA6合金的性能研究无卤阻燃增强PA66/PA6合金的性能研究叶士兵1,夏建盟1,冯嘉春2（1上海金发科技发展有限公司，上海201714；2复旦大学高分子科学系，上海200438）摘要：基于二乙基次膦酸铝和亚磷酸铝复配阻燃体系，研究了不同PA66和PA6比例时，阻燃增强PA66/PA6合金的力学性能、阻燃性能、电学性能、耐热性能以及湿热老化后的性能变化。随着合金中PA6比例的提高，材料的力学强度有略微下降，韧性相关指标略微提升，热变形温度和阻燃性能有所衰减。85℃/85RH%长期湿热老化试验结果显示，随合金中PA6比例的提高，材料吸水率逐渐增加，湿态下保持的拉伸强度更低，韧性更高，湿热老化后合金材料均未出现阻燃剂析出现象。无卤阻燃增强PA66/PA6合金的拉伸强度和绝缘电阻均随着温度升高而降低，PA6比例越高，合金材料的拉伸强度和绝缘电阻降低程度越明显。关键词：无卤阻燃；PA66/PA6合金；湿热老化；绝缘电阻；性能中图分类号：TQ327.1StudyonPropertiesofHalogen-freeFlame-retardantReinforcedPA66/PA6AlloyYEShi-bing1,XIAJian-meng1,FENGJia-chun2（1ShanghaiKINGFASci.&Tech.Co.,LTD.,Shanghai201714,China;2DepartmentofMacromolecularScienceofFudanUniversity,Shanghai200438,China）Abstract:Basedonthecombinedflameretardantsystemofaluminumdiethylphosphonateandaluminumphosphite,themechanicalproperties,flameretardance,electricalproperties,heatresistanceandthechangesofthepropertiesoftheglass-fiberreinforcedPA66/PA6alloywithdifferentPA66andPA6ratioswerestudied.WiththeincreaseofPA6ratiointhealloy,themechanicalstrengthofthealloydecreasesslightlywhilethetoughnessincreasesslightly,andthethermaldeformationtemperatureandflameretardancydecrease.Theresultsoflong-termagingtestat85℃/85RH%showthatthewaterabsorptionofthealloyincreasesgraduallywiththeincreaseofPA6ratio.Thetensilestrengthofthealloyislowerandthetoughnessishigherunderwetcondition,andnoprecipitatesofflameretardantappearafterhumid-heataging.Thetensilestrengthandinsulationresistanceofhalogen-freeflame-retardant,reinforcedPA66/PA6alloydecreasewiththeincreaseoftemperature.ThehighertheproportionofPA6is,themoreobviousthedecreaseoftensilestrengthandinsulationresistanceofthealloyis.Keywor...
