摘要
采用二乙基次膦酸铝(Alpi)阻燃剂对质量分数30%的玻璃纤维增强聚对苯二甲酰癸二胺(PA10T)和聚己二酰己二胺(PA66)进行阻燃改性,通过垂直燃烧法、锥形量热仪、热重和扫描电子显微镜(SEM)等手段研究了二者阻燃机理的差异。结果表明,少量Alpi(质量分数为12%)即可使PA10T垂直燃烧等级达到V–0级,总热释放量(THR)从80.4 MJ/m^2下降至59.5 MJ/m^2,峰值热释放速率(pkHRR)从296.4 kW/m^2下降至140.9 kW/m^2,单位质量损失下的CO释放(TCOR/TML)提高了132%,具有良好的凝聚相和气相阻燃效果;而在PA66体系中,Alpi的添加改变了PA66的热分解过程,TCOR/TML提高了265%,气相阻燃得到明显的增强,但THR从86.5 MJ/m^2下降至72.9 MJ/m^2,凝聚相阻燃不足,单独使用Alpi时薄试样的垂直燃烧等级难以达到V–0级。利用SEM对其锥形燃烧后残炭进行分析表明,PA10T材料的炭层较为平整且致密,而PA66材料的炭层相对疏松且凹凸不平。
The effect of Aluminum phosphinate (Alpi) on the flame retardancy of 30wt% glass fiber reinforced poly(decamethylene terephthalamide)(PA10T) and poly(hexamethylene adipamide)(PA66) was examined. The difference of flame retarding mechanism between PA10T and PA66 in this flame retardant system was studied by means of UL 94 test,cone calorimeter method (CONE), thermogravimetric analysis (TGA) method and scanning electron microscope (SEM). The results show that when the added Alpi content is 12wt%,the PA10T/GF/Alpi sample can reach UL94 V–0 level with the reduction of THR from 80.4 MJ /m^2 to 59.5 MJ/m^2,the reduction of pkHRR from 296.4 kW/m^2 to 140.9 kW/m^2 and the rate of CO release under unit mass loss (TCOR/TML) increases 132%,which means PA10T/GF/Alpi has good gas-phase and solid-phase flame retardant effect. The addition of Alpi can change the thermal decomposition process of PA66,which enhance the gas-phase flame retardant effect with the increasing of TCOR/TML in 265%. However,it’s hard to reach UL94 V–0 of the PA66/GF/Alpi sample only using Alpi as fire retardant due to the weak solid-phase flame retardant effect. The analysis of residual carbon after conical combustion by SEM shows that PA10T/GF/Alpi has dense carbon layer while PA66/GF/Alpi has loose carbon layer.
作者
钟一平
倪梦飞
麦杰鸿
姜苏俊
解明晨
Zhong Yiping;Ni Mengfei;Mai Jiehong;Jiang Sujun;Xie Mingchen(Kingfa Science and Technology Co. Ltd.,Guangzhou 510663,China;Vanteque Specialty Engineering Plastics Co. Ltd.,Zhuhai 519050,China;Jiangsu Kingfa Science and Technology Co. Ltd.,Kunshan 215334,China)
出处
《工程塑料应用》
CAS
CSCD
北大核心
2019年第4期103-106,共4页
Engineering Plastics Application
关键词
无卤阻燃
聚对苯二甲酰癸二胺
聚己二酰己二胺
阻燃机理
halogen free flame retardant
poly(decamethylene terephthalamide)
poly(hexamethylene adipamide)
flame retardant mechanism
