微波接枝改性尼龙66织物的阻燃性能

采用微波技术将甲基丙烯酸缩水甘油酯(GMA)和9，10-二氢-9-氧杂-10-磷杂菲-10-氧化物(DOPO)依次接枝到尼龙66织物表面，以提高其阻燃性能。探讨了引发剂质量分数、单体质量分数、反应时间和反应温度对接枝率和缩合率的影响，得到了最佳反应条件：引发剂KPS的质量分数0.3%，GMA单体质量分数5%，反应时间90min，GMA反应温度70℃；DOPO缩合反应时间4h，反应温度140℃，微波功率500W。对接枝后尼龙66织物的表面形貌采用衰减全反射-红外光谱（ATR FT-IR）与扫描电镜（SEM）进行表征，通过热重分析（TGA）、垂直燃烧及氧指数（LOI）测试对织物的热行为和阻燃性能进行了分析，测试了织物的力学性能，并对接枝织物的阻燃机理进行了初步探讨。结果表明：接枝后织物的成炭性能明显增强，阻燃性能得到改善。

Enhancing the flame retardancy of nylon 66 fabric by microwave induced grafting with glycidyl methacrylate and 6H-dibenz(C,E)(1, 2)oxaphosphorin-6-oxide (DOPO)

Glycidyl methacrylate (GMA) and 6H-dibenz(C, E)(1, 2)oxaphosphorin-6-oxide（DOPO）have been sequentially grafted onto a nylon 66 fabric surface under microwave irradiation in an attempt to improve the fire resistance of the fabric. The effects of varying the concentration of initiator and monomer, reaction time and reaction temperature on the grafting yield were analyzed. The optimal reaction conditions found to be as follows: initiator concentration of 0.3 wt%, GMA monomer concentration of 5 wt%, reaction times with GMA and DOPO of 90 min and 4 h respectively, with the reaction temperature for GMA and DOPO being 70℃ and 140℃, respectively. The surface morphology was characterized by scanning electron microscopy (SEM), and the chemical structure was investigated by attenuated total reflection infrared spectroscopy (ATR FT-IR). The thermal stability of grafted samples was characterized by thermogravimetric analysis (TGA), and the flammability was evaluated by vertical burning tests and limiting oxygen index (LOI) measurements. It has been demonstrated that both char formation and flame retardancy are significantly improved by the presence of the grafted chains.