Nano‐modified HDPE/PA6 microfibrillar composites: Effect of aminated graphite platelets coupling

Abstract

Modification of microfibrillar composites (MFCs) by nanofillers shows important effects of its localization on performance. This work deals with control of migration/localization of amine-modified graphite nanoplatelets (GNPAs) in the HDPE/PA6 system through their in situ coupling. GNPA/HDPE linking also leads to complex morphology of PA6 fibers. Although such control of GNPA localization and migration in MFC is limited, marked variations of properties, including decrease with high draw ratio, occurs. This is in spite of the fact that structure and crystallinity are comparable with that of the polymer/GNPA adduct. The reason is a more pronounced negative effect of presence of the GNP adducts in the fiber surface layer on HDPE crystallinity, in comparison with neat GNP, that is, formation of "soft" interface. The negative effects were markedly eliminated by pre-blending and coupling of GNPA in both polymer phases. Results confirm more effective control of MFC performance by in situ coupling of GNPA with polymer components in comparison with a nonreactive system.

Mechanical and viscoelastic properties of polyethylene‐based microfibrillated composites from 100% recycled resources

“…In this context, nanoparticles could also be incorporated in either phase to control the melt viscoelastic properties of the blends. The control of rheological properties could further control the fibrillation of the droplets during the stretching and the eventual dimensional properties of the generated fibrillar structure 9–15 . Incorporation of compatibilizers could also influence the phase interfacial interactions which control the induced droplet size during the melt mixing.…”

“…The control of rheological properties could further control the fibrillation of the droplets during the stretching and the eventual dimensional properties of the generated fibrillar structure. [9][10][11][12][13][14][15] Incorporation of compatibilizers could also influence the phase interfacial interactions which control the induced droplet size during the melt mixing. Therefore, the refined droplet size could further affect the geometrical properties of the formed fibrillar structure during the drawing step.…”