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首页> 外文期刊>Polymers for advanced technologies >PA66/PA12/clay based nanocomposites: structure and thermal properties
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PA66/PA12/clay based nanocomposites: structure and thermal properties

机译：PA66 / PA12 /粘土基纳米复合材料：结构和热性能

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摘要

In a previous paper the structure and the physical properties of melt mixed polyamide 66 (PA66)/polyamide 12 (PA12) blends characterized by different compositions have been investigated by means of morphological and physical analyses. A low amount of organically-modified layered silicate (OMLS, 4 wt%) was introduced in order to evaluate its effect on blends structure and components miscibility. This paper completes the characterization of these materials investigating their thermal properties by means of standard and modulated differential scanning calorimetry (DSC, MDSC), dynamic-mechanical analysis (DMA), and thermogravimetric analysis (TGA). The partial miscibility of PA66 and PA12, with phase separation depending on blend composition, has been confirmed by analyzing the glass transition temperature (Tg) dependence on composition as well as the existence of strong segmental interactions between polymer components. A compatibilizing action of OMLS has been observed because of a lowering of interfacial tension avoiding coalescence phenomena between particles during melt mixing process.
机译：在先前的论文中，已经通过形态和物理分析研究了以不同组成为特征的熔融混合的聚酰胺66（PA66）/聚酰胺12（PA12）共混物的结构和物理性能。引入了少量的有机改性层状硅酸盐（OMLS，4 wt％），以评估其对共混物结构和组分混溶性的影响。本文通过标准和调制差示扫描量热法（DSC，MDSC），动态机械分析（DMA）和热重分析（TGA），完成了这些材料的热特性研究。通过分析玻璃化转变温度（Tg）对组成的依赖性以及聚合物组分之间是否存在强烈的链段相互作用，已确认了PA66和PA12的部分混溶性，其相分离取决于共混物的组成。由于降低了界面张力，避免了在熔融混合过程中颗粒之间的聚结现象，已经观察到OMLS的相容作用。

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