0488610 - ÚMCH 2019 RIV GB eng J - Journal Article
Kelnar, Ivan - Bal, Ümitcan - Zhigunov, Alexander - Kaprálková, Ludmila - Fortelný, Ivan - Krejčíková, Sabina - Kredatusová, Jana
Complex effect of graphite nanoplatelets on performance of HDPE/PA66 microfibrillar composites.
Composites Part B-Engineering. Roč. 144, 1 July (2018), s. 220-228. ISSN 1359-8368. E-ISSN 1879-1069
R&D Projects: GA ČR(CZ) GA16-03194S
Institutional support: RVO:61389013
Keywords : polymer-matrix composites * interface/interphase * mechanical testing
OECD category: Composites (including laminates, reinforced plastics, cermets, combined natural and synthetic fibre fabrics
Impact factor: 6.864, year: 2018

The effect of nanofillers (NF) on parameters of polymer blends in microfibrillar composites (MFC) is complex due the effect of NF on melt drawing. This work concerns HDPE/PA66 modified with graphite nanoplatelets (GNP) prepared by different mixing protocols. GNP influence the dispersed phase size in the original blend negligibly and mostly lead to finer high-aspect ratio fibrils, i.e. GNP rather support elongation of inclusions than coalescence in the course of drawing. Favourable mechanical behaviour, exceeding predicted one, was found with low GNP content using the PA66 masterbatch. MFC with similar structure and GNP localization in PA66 show marked differences in properties depending on mixing protocol. Antagonistic effects found for the HDPE masterbatch indicate high effect of GNP migration between the components which affects the interphase by variation of crystallinity. The results confirm complex effect of GNP and dominancy of other GNP-induced effects over dual reinforcement with GNP and PA66 microfibrils.
Permanent Link: http://hdl.handle.net/11104/0283175