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首页> 外文期刊>Journal of Applied Polymer Science >Effect of inclusions and blending on the mechanical performance of recycled multilayer PP/PET/SiOx films
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Effect of inclusions and blending on the mechanical performance of recycled multilayer PP/PET/SiOx films

机译：夹杂物和共混物对再生PP / PET / SiOx多层薄膜机械性能的影响

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Extending the useful life of materials through recycling has proven to be an efficient means of reducing natural resource use and limiting the production of waste. In the case of polymer-based materials, in general, and of packaging materials, in particular, material recovery is complicated by the presence of incompatible polymers, as well as a priori undesirable contaminants such as inorganic inclusions. This article investigated the recycling of multilayer packaging material systems, based on polypropylene and silicon oxide-coated poly(ethylene terephthalate). In particular, the effect of a compatibilization of the blend using maleic anhydride-grafted polypropylene on the mechanical properties of the recycled material was examined. Without a compatibilizer, and at low compatibilizer concentrations, the blend exhibits a coarse morphology and is brittle. At a concentration of 5% wt of the compatibilizer, a fine morphology is obtained, and the blend shows excellent ductility. Beyond this concentration, a brittle interphase forms between the blend constituents, with a corresponding decrease in ductility. These results were confirmed by a study of strain-induced crystallization in the blend. Furthermore, the size of the SiOx inclusions, resulting from the fragmentation of the oxide coating during reprocessing, had no detectable influence on the mechanical properties of the recycled blend, providing that their concentration is lower than 2 x 10(-3). This study showed that a control of both the microstructure and interface properties considerably improves the mechanical properties of the recycled material, leading to high added-value applications. (C) 2000 John Wiley & Sons, Inc. [References: 23]
机译：通过回收利用来延长材料的使用寿命已被证明是减少自然资源使用和限制废物产生的有效手段。通常，在基于聚合物的材料的情况下，特别是在包装材料的情况下，由于存在不相容的聚合物以及先验的不希望的污染物，例如无机夹杂物，材料的回收变得很复杂。本文研究了基于聚丙烯和氧化硅涂层的聚对苯二甲酸乙二醇酯的多层包装材料系统的回收利用。特别地，研究了使用马来酸酐接枝的聚丙烯的共混物的相容性对回收材料的机械性能的影响。没有增容剂并且在低增容剂浓度下，共混物表现出粗糙的形态并且是脆性的。在相容剂的5重量％的浓度下，获得了良好的形态，并且该共混物显示出优异的延展性。超过该浓度，在共混物成分之间形成脆性中间相，延展性相应降低。通过对混合物中的应变诱导结晶进行的研究证实了这些结果。此外，SiOx夹杂物的尺寸是由后处理过程中的氧化物涂层碎裂产生的，如果其浓度低于2 x 10（-3），则对再循环混合物的机械性能没有可检测的影响。这项研究表明，同时控制微观结构和界面特性可大大改善回收材料的机械性能，从而带来高附加值的应用。 （C）2000 John Wiley＆Sons，Inc. [参考：23]

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