Abstract In this paper, two natural clays (namely, Sodium Cloisite and Sepiolite) were modified with low MW DNA from herring sperm and compounded in EVA copolymer (19 % of vinyl acetate) at 10 wt.% loading, using an internal mixer. The effect of the presence of the biomacromolecule-modified fillers on the thermal properties and on the flame retardance of the resulting composites was thoroughly investigated. In particular, thermogravimetric analyses showed that the presence of the DNA-modified filler enhanced the thermal and thermo-oxidative stability of the polymer matrix. Despite a very limited effect on flammability, cone calorimetry tests revealed that the DNA-modified nanofillers were able to significantly decrease the heat release rate, the peak of heat release rate, the total smoke production, and the specific extinction area. Finally, the presence of the modified nanofillers was responsible for the increase of stiffness, as well as for a certain decrease of ductility of the polymer matrix, as assessed by tensile tests.

中文翻译：

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含有 DNA 改性粘土的 EVA 的热稳定性和阻燃性

摘要 在本文中，两种天然粘土（即钠 Cloisite 和海泡石）用来自鲱鱼精子的低分子量 DNA 改性，并使用密炼机以 10 wt.% 的负载量与 EVA 共聚物（19% 的醋酸乙烯酯）混合。彻底研究了生物大分子改性填料的存在对所得复合材料的热性能和阻燃性的影响。特别是，热重分析表明，DNA 修饰填料的存在增强了聚合物基质的热稳定性和热氧化稳定性。尽管对可燃性的影响非常有限，但锥形量热法测试表明，DNA 修饰的纳米填料能够显着降低热释放率、热释放率峰值、总烟雾产生量和比消光面积。最后，