苯酰亚胺结构对PET阻燃抗熔滴及抑烟的贡献

发布时间：2019-01-23 15:48

【摘要】：通过本体聚合方法合成了一系列侧链含苯酰亚胺结构的聚对苯二甲酸乙二酯(PET)共聚酯.研究发现,苯酰亚胺单元的引入不仅提高了共聚酯的玻璃化转变温度(T_g)和高温成炭性,并且大大降低了共聚酯高温下的热分解速率.随着苯酰亚胺含量的增加,共聚酯表现出更高的氧指数(LOI)值和更好的阻燃抗熔滴效果.锥形量热测试结果表明,苯酰亚胺结构的引入可以有效地降低共聚酯的峰值热释放速率(p-HRR)、峰值烟释放速率(p-RSR)和总烟释放量(TSR).通过对纯PET和共聚酯燃烧测试后残炭的结构和形貌分析,发现苯酰亚胺结构有助于共聚酯形成石墨化程度更高的致密炭层,这些炭层起到隔热隔氧和抑制有机可燃烟气挥发的作用,在不引入传统阻燃剂的情况下,赋予共聚酯很好的本征阻燃性及抑烟性.
[Abstract]:A series of side chain poly (ethylene terephthalate) (PET) copolyester containing phenylimide structure were synthesized by bulk polymerization. It is found that the introduction of phenylimide unit not only increases the glass transition temperature (T _ p _ g) and the high temperature carbonization property of the copolyester, but also greatly reduces the thermal decomposition rate of the copolyester at high temperature. With the increase of phenylimide content, the copolyester showed higher oxygen index (LOI) and better flame retardancy and droplet resistance. The results of cone calorimetry show that the introduction of phenylimide structure can effectively reduce the peak heat release rate (p-HRR), peak smoke release rate (p-RSR) and total smoke emission (TSR).) of Copolyesters. By analyzing the structure and morphology of carbon residue after combustion test of pure PET and copolyester, it was found that the structure of phenylimide was helpful to form a dense carbon layer with higher graphitization degree. These carbon layers can insulate and insulate oxygen and inhibit the volatilization of organic combustible flue gas. Without introducing traditional flame retardants, these carbon layers endow the copolyester with good intrinsic flame retardancy and smoke suppression.
【作者单位】：四川大学化学学院高分子材料工程国家重点实验室环保型高分子材料国家地方联合工程实验室;
【基金】：国家自然科学基金(基金号21634006) 教育部创新团队计划(项目号IRT.1026)资助
【分类号】：O633.14

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