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J-integral evaluation of nanoclay-modified HDPE/PA6 microfibrillar composites
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SYSNO ASEP 0468071 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title J-integral evaluation of nanoclay-modified HDPE/PA6 microfibrillar composites Author(s) Kelnar, Ivan (UMCH-V) RID, ORCID
Hodan, Jiří (UMCH-V)
Kaprálková, Ludmila (UMCH-V)
Kratochvíl, Jaroslav (UMCH-V) RID
Hromádková, Jiřina (UMCH-V) RID
Kotek, Jiří (UMCH-V) RIDSource Title Polymer Testing. - : Elsevier - ISSN 0142-9418
Roč. 58, April (2017), s. 54-59Number of pages 6 s. Language eng - English Country GB - United Kingdom Keywords nanocomposite ; blend ; melt drawing Subject RIV JI - Composite Materials OECD category Composites (including laminates, reinforced plastics, cermets, combined natural and synthetic fibre fabrics R&D Projects GA13-15255S GA ČR - Czech Science Foundation (CSF) Institutional support UMCH-V - RVO:61389013 UT WOS 000395600700008 EID SCOPUS 85006097295 DOI 10.1016/j.polymertesting.2016.12.012 Annotation Microfibrillar composites (MFC) are polymer-polymer composites with many advantages, including good dispersion and bonding of in-situ generated fibrils. Recently, it has been shown that their performance can be enhanced by suitable addition of organophilized montmorillonite (oMMT) provided the numerous oMMT-induced effects are harmonized. This work deals with evaluation of resistance against unstable crack propagation (J-integral) in combination with Charpy and tensile impact strength methods, and SEM observation of fibrils shape and size and fracture surfaces. The results indicate that addition of PA6 inclusions and oMMT to relatively ductile HDPE reduces toughness evaluated using Charpy and J-integral. The fact that tensile impact strength is not reduced by oMMT indicates the importance of the impact testing mode for MFC. Of importance is the fact that formation of PA6 fibres reinforced with oMMT practically does not reduce toughness. Hence, the drawn oMMT-modified system with significantly higher stiffness and practically unchanged fracture resistance can be obtained. Combination of the complex effect of oMMT and in-situ fibrils reinforcement present a tool to attain polymer systems with enhanced well-balanced properties. Workplace Institute of Macromolecular Chemistry Contact Eva Čechová, cechova@imc.cas.cz ; Tel.: 296 809 358 Year of Publishing 2017
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