摘要
为改善高密度聚乙烯(HDPE)高压电缆护套的阻燃性能,通过热压法制备膨胀阻燃剂(IFR)掺杂的高密度聚乙烯(HDPE/IFR)复合材料,探究IFR的含量对HDPE/IFR复合材料的热稳定性、力学性能和阻燃性能的影响。结果表明:m(聚磷酸铵(APP))∶m(聚三(2-羟乙基)异氰脲酸对苯二甲酸酯(TT4))为1∶1时,HDPE/IFR(15%)具有较优的综合性能。相比HDPE,HDPE/IFR(15%)的极限氧指数(LOI)值提高94.4%;热释放速率峰值下降57.4%,火灾蔓延指数(FGI)减少71.9%。600℃时HDPE/IFR(15%)的残炭率约为9.6%,其热稳定性提高。HDPE/IFR(15%)的弯曲强度为21.6 MPa,弯曲模量为1 132.5 MPa,相比HDPE分别提高25.6%和70.5%。
In order to improve the flame retardancy of high-density polyethylene(HDPE) high-voltage cable sheath, highdensity polyethylene(HDPE/IFR) composites doped with intumescent flame retardant(IFR) were prepared by hot pressing.The effects of IFR content on the thermal stability, mechanical properties and flame retardancy of HDPE/IFR composites were investigated. The results show that when the mass ratio of ammonium polyphosphate(APP) to Poly(2-hydroxyethyl)isocyanurate terephthalate(TT4) is 1∶1, HDPE/IFR(15%) has better comprehensive performance. Compared with HDPE,the limiting oxygen index(LOI) value of HDPE/IFR(15%) is increased by 94.4%;peak heat release rate of HDPE/IFR(15%) is decreased by 57.4%, and fire spread index(FGI) is decreased by about 71.9%. The char residue of HDPE/IFR(15%) at 600 ℃ is about 9.6%, and its thermal stability is improved. The flexural strength and flexural modulus of HDPE/IFR(15%) are 21.6 MPa and 1 132.5 MPa, respectively, which are 25.6% and 70.5% higher than those of HDPE.
作者
曹张然
孟翔
马桂宁
CAO Zhang-ran;MENG Xiang;MAGui-ning(College of Electrical Energy and Power Engineering,Yangzhou University,Yangzhou 225000,China;Jiangsu College of Engineering and Technology,Nantong 226006,China;China Construction Eighth Bureau No.1 Construction Co.,Ltd.,Jinan 250000,China)
出处
《塑料科技》
CAS
北大核心
2022年第3期25-28,共4页
Plastics Science and Technology
关键词
高密度聚乙烯
膨胀型阻燃剂
阻燃性能
热稳定性
High-density polyethylene
Intumescent flame retardant
Flame retardancy
Thermal stability
