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

J. Trifol, M. van Drongelen, F. Clegg, D. Plackett, P. Szabo, A.E. Daugaard*

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

8 Citations (Scopus)
1 Downloads (Pure)

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
Original languageEnglish
Article number47486
Number of pages14
JournalJournal of applied polymer science
Volume136
Issue number20
Early online date21 Jan 2019
DOIs
Publication statusPublished - May 2019
Externally publishedYes

Fingerprint Dive into the research topics of 'Impact of thermal processing or solvent casting upon crystallization of PLA nanocellulose and/or nanoclay composites'. Together they form a unique fingerprint.

Cite this