Resilience improvement of an isotactic polypropylene-g-maleic anhydride by crosslinking using polyether triamine agents

Publication date: Available online 16 July 2019Source: PolymerAuthor(s): Adrien Létoffé, Sandrine Hoppe, Richard Lainé, Nadia Canilho, Andreea Pasc, Didier Rouxel, Rafael J. Jiménez Riobóo, Sébastien Hupont, Isabelle Royaud, Marc PonçotAbstractThe elaboration of new hybrid polymer/metal composite materials depends on the development of innovative polymer matrices with improved mechanical properties and high effective adhesion behaviour with metal surfaces. This way, a new type of polyolefin was developed based on a peculiar crosslinking reaction. For this elaboration, an iPP-g-MAH with 1wt% of MAH was crosslinked with polyether triamine molecules by twin screw reactive extrusion. The evolution of the crosslinking reaction, the microstructure and the mechanical behaviour of the different materials were studied as a function of the NH2:MAH molar ratio in the range of 0:1 and 1.5:1. Gel content determination and FTIR analysis were performed to characterise the material at the molecular scale, when differential scanning calorimetry, wide angle X-rays scattering and self-successive auto-nucleation techniques were used for a deep microstructure analysis. Brillouin spectroscopy showed an interesting evolution of the elastic constants at the microscopic scale and results were in good agreement with those obtained at the macroscopic scale by a video-controlled uniaxial tensile test. Moreover, it was demonstrated that the true mechanical behaviours switch from brittle to ductile...

Source: Polymer - July 17, 2019 Category: Chemistry Source Type: research