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Mechanical, flow and electrical properties of thermoplastic polyurethane/fullerene composites: Effect of surface modification of fullerene
Date
2015-10-01
Author
Tayfun, Umit
KANBUR, YASİN
ABACI, UFUK
GÜNEY, HASAN YÜKSEL
Bayramlı, Erdal
Metadata
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This work is licensed under a
Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License
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Thermoplastic polyurethane (TPU) composites with fullerene loadings varying from 0.5 to 2 weight% were prepared by melt-mixing method. Nitric acid oxidation and silanization were applied to fullerene surface to improve interfacial interactions with TPU matrix. The influence of surface modifications of fullerene on mechanical, melt flow and electrical properties of TPU based composites were investigated. Incorporation of fullerene leads to nearly twofold increase in tensile strength and Young's modulus of the composites in addition to enhancing the flexibility. The best results are obtained in nitric acid and silane modified fullerene containing composites at the lowest concentration (0.5%). Higher MFI values were observed for composites loaded with surface treated fullerenes compared to pristine fullerene because of their better dispersion in TPU. Electrical properties of TPU also improved by the addition of surface modified fullerene particles. Surface oxidation and silanization gave rise to dispersion homogeneity which may be the reason of both tensile strength and strain improvements at the same time.
Subject Keywords
Polymer-matrix composites (PMCs)
,
Particle-reinforcement
,
Mechanical testing
,
Extrusion
URI
https://hdl.handle.net/11511/57526
Journal
COMPOSITES PART B-ENGINEERING
DOI
https://doi.org/10.1016/j.compositesb.2015.05.013
Collections
Graduate School of Natural and Applied Sciences, Article