摘要以乙烯基三甲氧基硅烷为单体，在碱性条件下制备纳米乙烯基硅树脂(VSR)，将VSR 与经过硬脂酸和硬脂酸钙改性的氢氧化镁（MH）作为阻燃剂添加到PA6中，通过挤出造粒制备复合材料。通过对复合材料进行氧指数测试（OI） 、热重分析(TG)、红外测试(FTIR)、及扫描电镜（SEM）分析研究复合材料的阻燃性能。研究结果表明：当加入的阻燃剂总量为 30wt%时，随着硅树脂加入量的增加，残炭量也增加，这说明乙烯基硅树脂能促进成炭；在总阻燃剂为30wt%时，乙烯基硅树脂加入能提高材料的 OI值，当加入量为 8wt%时协同阻燃效果达到最好，其OI值可达 28.8，这说明改性氢氧化镁与乙烯基硅树脂有协同阻燃作用；拉伸性能测试表明改性氢氧化镁的加入能降低材料的力学性能，而乙烯基硅树脂的加入对材料的力学性能没有明显的影响。59688
毕业论文关键词 PA6 乙烯基硅树脂 改性氢氧化镁 协同阻燃
Title The Study of Synergistic Flame Retardant Nylon 6
Abstract Nano vinyl silicone resin(VSR) particles were synthesized by vinyl trimethoxy silane. The flame- retarded nylon materials were prepared by extruder and curing press machine using modified magnesium hydroxide and vinyl silicone resin as flame retardant. The flame-retardant performance was studied by oxygen index(OI), thermogravimetry(TG), scanning electron microscope(SEM) and FTIR. The results showed that when the total amount of flame retardant resin is 30wt%, the amount of residual carbon increases, with the amount of VSR increasing. Respectively, It suggested that VSR can promote char forming. The OI showed that when the total amount of flame retardant resin was 30wt%, the addition of the vinyl silicone resin could increase the OI of the materials. When the mass fraction of vinyl silicone resin was 8%, the OI reached 28.8, and the synergism was the best. It explained the synergism of flame retardancy of VSR and modified magnesium hydroxide. While modified magnesium hydroxide can lower the mechanical properties of composite materials, VSR had minimal negative effect.
Keywords: Nano VSR Modified MH PA6 Synergistic flame retardant
目次
1 绪论. 1
1.1 尼龙 6简介 .. 1
1.2 阻燃剂的研究现状 .. 1
1.3 硅树脂的研究背景 .. 3
1.4 氢氧化镁阻燃剂 . 4
1.5 阻燃尼龙 6的研究现状 . 4
1.6 本文研究思路 5
2 实验部分 6
2.1 实验原料 . 6
2.2 实验仪器 . 6
2.3 乙烯基硅树脂的制备 7
2.4 改性氢氧化镁的制备 8
2.5 协效阻燃 PA6 的制备 8
2.6 性能测试 . 8
3 实验结果及讨论 9
3.1 纳米乙烯基硅树脂的表征 .. 9
3.2 改性氢氧化镁的表征 .. 10
3.3 复合材料的氧指数分析 12
3.4 复合材料的拉伸性能分析 . 13
3.5 复合材料的热重分析 .. 15
3.6 复合材料的红外谱图分析 . 16
3.7 复合材料的 X 射线衍射分析 .. 17 协同阻燃尼龙6的研究 :http://www.751com.cn/huaxue/lunwen_64982.html