Hybrid nanocomposites of elastomeric polyurethane containing halloysite nanotubes and POSS nanoparticles: tensile, hardness, damping and abrasion performance
No Thumbnail Available
Date
2020
Authors
Tirkeş, Seha
Tirkes, Seha
Akar, Alinda Oyku
Tayfun, Umit
Journal Title
Journal ISSN
Volume Title
Publisher
Cambridge Univ Press
Open Access Color
OpenAIRE Downloads
OpenAIRE Views
Abstract
Thermoplastic polyurethane (TPU) matrix was reinforced with polyhedral oligomeric silsesquioxane (POSS) and halloysite nanotubes (HNT), both separately and combined. Composite samples were fabricated using a melt-compounding method. Characterization of the composites obtained was performed via tensile and hardness tests, melt-flow index measurements (MFI), abrasion tests, dynamic mechanical analysis (DMA) and scanning electron microscopy (SEM) to investigate the mechanical performance, flow behaviour, tribological characteristics, thermo-mechanical response and morphological properties. The greatest tensile strength value was obtained for the smallest HNT content. Further addition of HNT resulted in agglomerations for both POSS and HNT particles. The shore hardness of TPU was enhanced by filler inclusions. The TPU/POSS composites displayed significant improvement in terms of abrasion resistance compared to TPU at lower loading levels. The DMA study showed that composites containing 0.5% POSS and 1.0% HNT displayed the greatest storage modulus. The glass-transition temperature of TPU shifted to smaller values with the addition of both nanoparticles. The HNT inclusions increased the MFI value of TPU because of their large aspect ratio. Homogeneous mixing of nanoparticles in the TPU matrix was confirmed by a SEM study of the composites. Their dispersion decreased as the concentrations of POSS and HNT increased. An adjuvant effect of POSS with HNT was achieved in their hybrid composites.
Description
Tayfun, Ümit/0000-0001-5978-5162; Akar, Alinda Oyku/0000-0003-1596-8439
Keywords
Extrusion, halloysite nanotube, hybrid composites, POSS, polymer-clay composites, thermoplastic polyurethane
Turkish CoHE Thesis Center URL
Fields of Science
Citation
11
WoS Q
Q3
Scopus Q
Source
Volume
55
Issue
4
Start Page
281
End Page
292