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Influence of Processing Conditions on Properties of Poly (Vinyl acetate)/Cellulose Nanocrystal Nanocomposites
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Sapkota, Janak, Kumar, Sandeep, Weder, Christoph and Foster, E. Johan (2015) Influence of Processing Conditions on Properties of Poly (Vinyl acetate)/Cellulose Nanocrystal Nanocomposites. Macromolecular Materials and Engineering, 300 (5). pp. 562-571. doi:10.1002/mame.201400313 ISSN 1438-7492.
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Official URL: http://dx.doi.org/10.1002/mame.201400313
Abstract
We investigated how different processing methods affect the morphology and mechanical properties of nanocomposites made from poly(vinyl acetate) (PVAc) and cellulose nanocrystals (CNCs). Homogeneously mixed reference PVAc/CNC nanocomposites of various compositions were first prepared by solution casting. These materials were post-processed by mixing in a roller blade mixer (RBM) or a twin-screw extruder (TSE) and subsequent compression molding. Transmission electron microscopy was used to elucidate the dispersion and size distribution of the CNCs and these data were correlated with the materials' mechanical properties. While RBM processed composites are virtually indistinguishable from the solution-cast reference materials, TSE processing led to mechanical degradation of the CNCs and resulted materials with inferior mechanical properties. Direct RBM mixing of PVAc and CNCs was also explored. This process afforded materials that are much stiffer than the neat matrix, but did not reach the levels of the reference series.
Item Type: | Journal Article | ||||||
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Divisions: | Faculty of Science, Engineering and Medicine > Engineering > WMG (Formerly the Warwick Manufacturing Group) | ||||||
Journal or Publication Title: | Macromolecular Materials and Engineering | ||||||
Publisher: | Wiley | ||||||
ISSN: | 1438-7492 | ||||||
Official Date: | May 2015 | ||||||
Dates: |
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Volume: | 300 | ||||||
Number: | 5 | ||||||
Page Range: | pp. 562-571 | ||||||
DOI: | 10.1002/mame.201400313 | ||||||
Status: | Peer Reviewed | ||||||
Publication Status: | Published | ||||||
Access rights to Published version: | Restricted or Subscription Access |
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