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首页> 外文期刊>Journal of Applied Polymer Science >Effect of Clay Dispersion on the Rheological Properties and Flammability of Polyurethane-Clay Nanocomposite Elastomers
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Effect of Clay Dispersion on the Rheological Properties and Flammability of Polyurethane-Clay Nanocomposite Elastomers

机译：粘土分散对聚氨酯-粘土纳米复合弹性体流变性能和可燃性的影响

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摘要

Polyurethane-clay nanocomposite elastomers were synthesized using polyol-clay blends with different levels of dispersion, which affected the final elastomer microstructure. A PU-clay microcomposite elastomer containing partially dispersed clay showed poorer mechanical and similar fire properties to the unmodified polyurethane. More complete dispersion of the clay into the polyol led to an exfoliated structure in the final elastomer. This showed a higher modulus and kept a viscoelastic behavior to higher temperature than the pristine PU. The enhancement of mechanical and thermal properties in the nanocomposite elastomer can be attributed to the degree of clay exfoliation, and this also prevented dripping during the UL 94 fire test.
机译：使用具有不同分散水平的多元醇-粘土共混物合成聚氨酯-粘土纳米复合弹性体，这会影响最终的弹性体微观结构。包含部分分散的粘土的PU粘土微复合弹性体与未改性的聚氨酯相比，机械性能和防火性能较差。粘土在多元醇中的更完全分散导致最终的弹性体出现剥离结构。与原始PU相比，这显示出更高的模量并且在更高的温度下保持了粘弹性行为。纳米复合弹性体中机械性能和热性能的提高可以归因于粘土的剥落程度，这还可以防止在UL 94耐火测试期间滴落。

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