Polystyrene (PSt) was grafted onto a thermoplastic polyurethane (TPU) through a combination of atom transfer radical polymerization and “grafting to” techniques to afford a TPU- g -PSt copolymer. The chemical structures of the synthesized polymers were characterized using Fourier transform infrared and proton nuclear magnetic resonance spectroscopies. The polymer/clay nanocomposite of the resultant TPU- g -PSt copolymer was fabricated through a solution intercalation approach. The powder X-ray diffraction and transmission electron microscopy studies revealed an intercalated structure for the fabricated TPU- g -PSt/clay nanocomposite. According to thermal property studies’ results, the fabricated TPU- g -PSt/clay nanocomposite exhibited higher thermal stability upon the addition of only a small amount (5 wt%) of organoclay.

中文翻译：

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通过接枝明确定义的聚苯乙烯改性热塑性聚氨酯及其聚合物/粘土纳米复合材料的制备

聚苯乙烯 (PSt) 通过原子转移自由基聚合和“接枝到”技术的组合接枝到热塑性聚氨酯 (TPU) 上，得到 TPU-g-PSt 共聚物。使用傅立叶变换红外光谱和质子核磁共振光谱表征合成聚合物的化学结构。所得 TPU-g-PSt 共聚物的聚合物/粘土纳米复合材料是通过溶液嵌入方法制造的。粉末 X 射线衍射和透射电子显微镜研究揭示了制造的 TPU-g-PSt/粘土纳米复合材料的插层结构。根据热性能研究的结果，在仅添加少量（5wt%）有机粘土后，制备的 TPU-g-PSt/粘土纳米复合材料表现出更高的热稳定性。