偶联剂改性无机硅系阻燃剂对粘胶纤维性能的影响研究

Study on Effect of Silane Coupling Agent Modified Inorganic Silicon Flame Retardant on the Properties of Viscose Fibers

采用4种偶联剂对无机硅系阻燃剂进行了表面改性,然后用于制备阻燃粘胶纤维。研究了用于表面改性的偶联剂种类及用量、纺丝时改性无机硅系阻燃剂用量对粘胶纤维性能的影响。结果表明,采用N-β-氨乙基-γ-氨丙基甲基二甲氧基硅烷(KH 602)改性无机硅系阻燃剂的粘胶纤维的物理力学性能和阻燃性能较佳。KH 602的较佳用量为1.0%,改性无机硅系阻燃剂的较佳用量为20%,此时制得的粘胶纤维干断裂强度为2.56 cN/dtex,湿断裂强度为1.40 cN/dtex,干断裂伸长率为21%,回潮率为9.0%,超长率为0.3%,极限氧指数为33.0%,垂直燃烧等级为V-0,燃烧成炭性能良好,无熔滴现象。

The flame retardant of inorganic silicon was surface-modified with four coupling agents and then they were used to prepare flame retardant viscose fibers.The influence of the type and amount of coupling agent for surface modification and the amount of modified inorganic silicon flame retardant on the properties of viscose fiber were studied.The results show that N-β-aminoethyl-γ-aminopropylmethyldimethoxysilane(KH 602)has greatly improved the physical and mechanical properties of flame-retardant fibers.When the amount of KH 602 was 1%and the amount of silicone flame retardant was 20%,the viscose fiber presented breaking strength of 2.56 cN/dtex,wet fracture strength of 1.40 cN/dtex,elongation at break of 21%,moisture return rate of 9.0%,ultra-length rate of 0.3%,ultimate oxygen index of 33.0%,and vertical combustion of level V-0,with no melting and good carbon combustion.