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用9,10-二氢-9-氧-10-磷杂菲-10-氧化(物DOPO)与γ-(2,3-环氧丙基)丙基三甲氧基硅烷(GPTMS)制备了新型磷硅复合物(P-Si),并以P-Si改性的氢氧化镁(MH)制备阻燃线型低密度聚乙烯(LLDPE),研究了P-Si用量对LLDPE阻燃性能和力学性能的影响。通过锥形量热仪(CONE)和扫描电子显微镜(SEM)等对材料进行了表征。结果表明:P-Si在改善MH与基体树脂相容性的同时,与MH有很好的协同阻燃作用。当P-Si用量为MH的5%时,阻燃LLDPE的氧指(数OI)从30.0%提高到36.5%,热释放速率峰值(pHRR)和平均热释放速率(mHRR)也大幅度下降。
A new type of 9,10-dihydro-9-oxo-10-phosphaphenanthrene-10-oxide (DOPO) and γ- (2,3- epoxypropyl) propyltrimethoxysilane (GPTMS) (P-Si), and flame retardant linear low density polyethylene (LLDPE) was prepared by P-Si modified magnesium hydroxide (MH). The effects of P-Si dosage on flame retardancy and mechanical properties of LLDPE The impact of performance. The materials were characterized by cone calorimeter (CONE) and scanning electron microscopy (SEM). The results show that P-Si has synergistic flame retardancy with MH while improving the compatibility of MH with matrix resin. When the P-Si content is 5% of MH, the oxygen index (number OI) of flame-retardant LLDPE is increased from 30.0% to 36.5%, and the peak of heat release rate (pHRR) and average heat release rate (mHRR) also decrease significantly.