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Synergistic reinforcement of highly oriented poly(propylene) tapes by sepiolite nanoclay

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Author: Bilotti, E. · Deng, H. · Zhang, R. · Lu, D. · Bras, W. · Fischer, H.R. · Peijs, T.
Type:article
Date:2010
Institution: TNO Industrie en Techniek
Source:Macromolecular Materials and Engineering, 1, 295, 37-47
Identifier: 281699
Keywords: Materials · Clays · Crystallization · Fibers · Poly-(propylene) (PP) · 1D objects · Composite models · Dispersion state · Drawing process · Filler loading · Isotactics · Micro-mechanical · Nano clays · Needle-like · Oriented polymers · Polymer morphology · Rheological property · Crystallization · Nanocomposites · Nanostructured materials · Propylene · Reinforcement · Rheology · Mechanical properties · Industrial Innovation · Mechatronics, Mechanics & Materials · MIP - Materials for Integrated Products · TS - Technical Sciences

Abstract

This paper reports the properties of highly oriented nanocomposite tapes based on isotactic PP and needle-like sepiolite nanoclay, obtained by a solid state drawing process. The intrinsic 1D character of sepiolite allows its exploitation in 1D objects, such as oriented polymer fibres and tapes, where it can be uniaxially oriented upon drawing. A synergistic increase in mechanical properties is presented for highly drawn tapes (γ ≤ 20) and low filler loadings (≤2.5 wt.-%), which can not be simply explained by micromechanical composite models. Instead, mechanical properties are intimately related to the dispersion state of the nanoclays in PP, the rheological properties of the nanocomposites and the polymer morphology. © 2010 WILEY-VCH Verlag GmbH & Co. KGaA.