Impact of thermal processing or solvent casting upon crystallization of PLA nanocellulose and/or nanoclay composites

TRIFOL, J., VAN DRONGELEN, M., CLEGG, Francis, PLACKETT, D., SZABO, P. and DAUGAARD, A. E. (2019). Impact of thermal processing or solvent casting upon crystallization of PLA nanocellulose and/or nanoclay composites. Journal of applied polymer science, p. 47486.

[img] PDF
Clegg_impact_thermal_processing_(AM).pdf - Accepted Version
Restricted to Repository staff only until 21 January 2020.
All rights reserved.

Download (890kB)
Official URL: https://onlinelibrary.wiley.com/doi/full/10.1002/a...
Link to published version:: https://doi.org/10.1002/app.47486

Abstract

Here, we present how processing (solvent casting or isothermal crystallization) impacts crystallinity of poly(lactic acid) (PLA) and its nanocomposites (PLA/1 wt % cellulose nanofibers (CNFs), PLA/1 wt % nanoclay (C30B) or PLA/1 wt % CNF/1 wt % C30B. Polarized optical microscopy demonstrated a heterogeneous nucleation process during isothermal crystallization leading to smaller homogeneously distributed spherulites. With solvent casting, no effect on morphology was observed with respect to the nanoparticles, but an increased spherulite size was observed at higher temperatures. This fact raises significant concerns regarding the suitability of solvent casting as a lab‐scale procedure to investigate materials. Additionally, combining the reinforcing agents, CNF, and C30B, did not increase nucleation rate, in contrast with the general tendency, where the incorporation of both particles led to improved properties (e.g., thermomechanical and barrier properties). However, a combination of C30B and CNF did lead to an overall increase in the rigid amorphous fraction and a reduced mobile amorphous fraction.

Item Type: Article
Additional Information: ** From Crossref via Jisc Publications Router **Journal IDs: pissn 0021-8995 **History: published 21-01-2019
Uncontrolled Keywords: Materials Chemistry, General Chemistry, Surfaces, Coatings and Films, Polymers and Plastics
Identification Number: https://doi.org/10.1002/app.47486
SWORD Depositor: Margaret Boot
Depositing User: Margaret Boot
Date Deposited: 01 Feb 2019 11:10
Last Modified: 04 Mar 2019 11:59
URI: http://shura.shu.ac.uk/id/eprint/23935

Actions (login required)

View Item View Item

Downloads

Downloads per month over past year

View more statistics