Abstract The interfacial interaction in polyamide/tin-fluoro-phosphate glass (TFP-glass) composites exhibits a positive correlation with temperature, whose mechanism is still unknown. The thermal-induced dissociation behavior at 232 °C of TFP-glass, which has been observed and investigated in our previous works, provides a plausible mechanism for the temperature-dependency of the interfacial interaction. In this work, the influence of the dissociation degree, which is controlled by processing temperature, on the interfacial interaction between TFP-glass and copolymerized 6/66 copolymer (cPA) is investigated. Three processing temperatures, 215, 230, and 245 °C (below, around and above the dissociation temperature of TFP-glass, Td = 232 °C), are chosen to prepare cPA/TFP-glass composites. With increasing the degree of dissociation, improved dispersion of TFP-glass particles in polymer matrix and enhanced interconnection between the two components are observed, indicating that the interfacial interaction in cPA/TFP-glass composites is gradually enhanced. The dielectric relaxation spectra, which can probe the local motions of macromolecular fragments at different length scales, are used to investigate the influence of the dissociation degree on the length scale of the interfacial interaction in cPA/TFP-glass composites. The improved thermal stability of cPA/TFP-glass composites filled with the same content of TFP-glass also confirms the enhancement of the interfacial interaction. Therefore, conclusions can be drawn that the dissociation behavior of TFP-glass is contributed to the temperature-dependency of the interfacial interaction in polyamide/TFP-glass composites. The work reported in this paper should provide theoretical guidance for taking advantage of this positive correlation with temperature of the interfacial interaction and help us to deeply understand the mechanism for the interfacial interaction in TFP-glass filled composites.

中文翻译：

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聚酰胺/锡-氟-磷酸盐玻璃复合材料中界面相互作用的温度依赖性机制

摘要 聚酰胺/锡-氟-磷酸盐玻璃（TFP-glass）复合材料中的界面相互作用与温度呈正相关，其机制尚不清楚。TFP-玻璃在 232°C 下的热诱导解离行为，在我们之前的工作中已经观察和研究，为界面相互作用的温度依赖性提供了一个合理的机制。在这项工作中，研究了由加工温度控制的离解度对 TFP-玻璃与共聚 6/66 共聚物 (cPA) 之间界面相互作用的影响。选择三个加工温度 215、230 和 245 °C（低于、大约和高于 TFP-玻璃的解离温度，Td = 232 °C）来制备 cPA/TFP-玻璃复合材料。随着解离度的增加，观察到 TFP-玻璃颗粒在聚合物基体中的分散性得到改善，两种组分之间的互连增强，表明 cPA/TFP-玻璃复合材料中的界面相互作用逐渐增强。介电弛豫谱可以探测大分子碎片在不同长度尺度上的局部运动，用于研究解离度对 cPA/TFP-玻璃复合材料界面相互作用长度尺度的影响。填充相同含量的 TFP-玻璃的 cPA/TFP-玻璃复合材料改善的热稳定性也证实了界面相互作用的增强。因此，可以得出结论，TFP-玻璃的解离行为有助于聚酰胺/TFP-玻璃复合材料中界面相互作用的温度依赖性。