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TitleDevelopment of crystalline morphology and its relationship with mechanical properties of PP/PET microfibrillar composites containing POE and POE-g-MA
Author(s)Kuzmanović, Maja
Delva, Laurens
Mi, Dashan
Martins, Carla I.
Cardon, Ludwig
Ragaert, Kim
Keywordsmicrofibrillar composites
crystalline morphology
mechanical properties
Issue date8-Mar-2018
PublisherMultidisciplinary Digital Publishing Institute
Abstract(s)The main goal of this research is to study the development of crystalline morphology and compare it to various mechanical properties of microfibrillar composites (MFCs) based on polypropylene (PP) and poly(ethylene terephthalate) (PET), by adding a functional compatibilizer and a non-functional rubber in two different steps in the processing sequence. The MFCs were prepared at a weight ratio of 80/20 PP/PET by twin screw extrusion followed by cold drawing and injection moulding. The non-functionalized polyolefin-based elastomer (POE) and the functional compatibilizer (i.e., POE grafted with maleic anhydride (POE-<i>g</i>-MA)) were added in a fixed weight percentage at two stages: during extrusion or during injection moulding. The morphology observations showed differences in crystalline structure, and the PP spherulite size was reduced in all MFCs due to the presence of PET fibrils. Their relationship with the mechanical performances of the composite was studied by tensile and impact tests. Adding the functional compatibilizer during extrusions showed better mechanical properties compared to MFCs. Overall, a clear relationship was identified between processing, structure and properties.
DescriptionThe following are available online at
AccessOpen access
Appears in Collections:IPC - Artigos em revistas científicas internacionais com arbitragem

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