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首页> 外文期刊>Journal of Applied Polymer Science >Effect of organoclay and silane grafting of polyethylene on morphology, barrierity, and rheological properties of HDPE/PA6 blends
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Effect of organoclay and silane grafting of polyethylene on morphology, barrierity, and rheological properties of HDPE/PA6 blends

机译：聚乙烯的有机粘土和硅烷接枝对HDPE / PA6共混物形态，阻隔性和流变性的影响

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Silane-grafted high-density polyethylene (HDPE-g-Si) was prepared by reactive extrusion. The grafted polyethylene (PE) was then melt compounded with organically modified montmorillonite and polyamide-6 (PA6) to form ternary nanocomposite. Fourier Transfer Infrared was used for investigation of grafting efficiency of specimens. Dispersion of clay in the blends and individual polymers were examined by X-ray diffraction (SAXS) and transmission electron microscopy (TEM). Scanning electron microscopy and dynamic rheology were also used for further study of microstructure along with compatibilization effect of silane grafting and adding organoclay in the blends. SAXS and TEM study showed that nanoclay was delaminated by PA6 or HDPE-g-Si chains, whereas the intercalation of neat HDPE in clay layers was negligible especially in higher level of clay. The morphological studies indicated that silane-grafted HDPE had hydrophilic characteristics and, therefore, was more compatible with PA6 than neat PE. Furthermore, in the same way adding nanoclay to this blends resulted in more uniform and finer morphology. And finally, results of oxygen and hydrocarbon permeability measurement demonstrated synergetic effect of silane grafting and presence of clay on barrierity improvement of samples.
机译：通过反应挤出制备硅烷接枝的高密度聚乙烯（HDPE-g-Si）。然后将接枝的聚乙烯（PE）与有机改性的蒙脱石和聚酰胺6（PA6）熔融混合，形成三元纳米复合材料。傅里叶转移红外用于研究标本的嫁接效率。通过X射线衍射（SAXS）和透射电子显微镜（TEM）检查粘土在共混物和单个聚合物中的分散性。扫描电子显微镜和动态流变学也用于进一步研究微观结构以及硅烷接枝和在共混物中添加有机粘土的增容作用。 SAXS和TEM研究表明，纳米粘土被PA6或HDPE-g-Si链分层，而纯净HDPE在粘土层中的插入微不足道，特别是在较高含量的粘土中。形态学研究表明，硅烷接枝的HDPE具有亲水特性，因此与PA6的相容性高于纯PE。此外，以相同的方式将纳米粘土添加到该共混物中导致更均匀和更精细的形态。最后，氧气和碳氢化合物渗透率的测量结果证明了硅烷接枝和粘土的存在对样品阻隔性提高的协同作用。

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