Loughborough University
Leicestershire, UK
LE11 3TU
+44 (0)1509 263171
Loughborough University

Loughborough University Institutional Repository

Please use this identifier to cite or link to this item: https://dspace.lboro.ac.uk/2134/24839

Title: Tortuosity model to predict the combined effects of crystallinity and nano-sized clay mineral on the water vapour barrier properties of polylactic acid
Authors: Tan, Bowen
Thomas, Noreen L.
Keywords: Poly(lactic acid)
Montmorillonite (Mt)
Crystallinity
Water vapour permeability
Tortuosity model
Nanocomposites
Issue Date: 2017
Publisher: © Elsevier
Citation: TAN, B. and THOMAS, N.L., 2017. Tortuosity model to predict the combined effects of crystallinity and nano-sized clay mineral on the water vapour barrier properties of polylactic acid. Applied Clay Science, 141, pp. 46-54.
Abstract: The combined effects of crystallinity and nano-sized clay mineral (montmorillonite) fillers on the water vapour barrier properties of poly(lactic acid) (PLA) nanocomposites are investigated. Both amorphous and semi-crystalline PLA nanocomposites containing 0 to 5 wt% montmorillonite clay are prepared by melt compounding followed by compression moulding with two different thermal treatments: quenching and annealing. Thermal properties and morphology are investigated using differential scanning calorimetry (DSC), polarised light microscopy, transmission electron microscopy (TEM) and wide-angle X-ray diffraction (WAXD). It is confirmed that the nanocomposite structures are intercalated and the montmorillonite aspect ratio is measured to be 40 in both quenched and annealed samples. Water vapour transmission rates (WVTR) through the film samples are measured. A new tortuous path model is developed that fits the WVTR data and accounts for the effects of crystallinity as well as montmorillonite aspect ratio, concentration and orientation.
Description: This paper is closed access until 20th February 2018.
Sponsor: Department of Materials, Loughborough University, UK.
Version: Accepted for publication
DOI: 10.1016/j.clay.2017.02.014
URI: https://dspace.lboro.ac.uk/2134/24839
Publisher Link: http://dx.doi.org/10.1016/j.clay.2017.02.014
ISSN: 0169-1317
Appears in Collections:Closed Access (Materials)

Files associated with this item:

File Description SizeFormat
Applied Clay Science 2017 Accepted Manuscript.pdfAccepted version1.45 MBAdobe PDFView/Open

 

SFX Query

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.