Abstract

Nanocomposites of Polypropylene/Polyamide 66 (iPP/PA66) with a weight ratio of (70/30) filled with stearic acid-treated nanosized CaCO₃ were melt compounded in the presence of a fixed amount of grafted polypropylene maleic anhydride (PP-g-MA) in a Brabender mixer. The purpose of this research is to obtain nanocomposites with high-performance structural, morphological, and thermomechanical properties. The obtained properties are discussed in light of the content of nano-CaCO₃ and of the induced interfacial bonding properties generated by the insertion of the compatibilizer. The results confirmed that, according to the FTIR spectroscopy analysis, the existence, on one hand of possible interactions between PP-g-MA and PA66 and, on the other hand, between stearic acid and PA66. XRD results show that nanosized CaCO₃ particles play the role of nucleating agents in the matrix and thus increasing the crystallinity of the blend. SEM results revealed that the treated nanosized CaCO₃ was more homogeneously dispersed in the (iPP/PA66), and a refinement of the morphology and better dispersion of the filler were detected after the addition of PP-g-MA. From the mechanical point of view; the incorporation of CaCO₃ increased appreciably the tensile strength at break and the tensile modulus of (iPP/PA66) blend.

摘要

具有填充有硬脂酸处理的碳酸钙纳米的重量比（70/30）聚丙烯/聚酰胺66（IPP / PA66）的纳米复合材料₃是在熔融接枝聚丙烯的马来酸酐的固定量的存在加剧（PP-G- MA）在布拉本德搅拌机中。本研究的目的是获得具有高性能结构、形态和热机械性能的纳米复合材料。根据纳米CaCO ₃的含量讨论所得性质以及由增容剂的插入产生的诱导界面结合特性。结果证实，根据 FTIR 光谱分析，一方面存在 PP-g-MA 和 PA66 之间可能的相互作用，另一方面，硬脂酸和 PA66 之间可能存在相互作用。XRD结果表明纳米CaCO ₃颗粒在基体中起到成核剂的作用，从而提高了共混物的结晶度。SEM 结果表明，处理后的纳米级 CaCO ₃更均匀地分散在 (iPP/PA66) 中，并且在添加 PP-g-MA 后检测到形貌的细化和填料的更好的分散。从机械角度；CaCO _{3 的加入} 显着提高了（iPP/PA66）共混物的断裂拉伸强度和拉伸模量。