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- Title
The influence of melt mixing on the stability of cellulose acetate and its carbon nanotube composites.
- Authors
Delgado-Lima, Ana; Paiva, Maria C.; Machado, Ana Vera
- Abstract
Cellulose derivatives, such as cellulose acetate (CA), are commonly used due to their ease of processing. These polymers present interesting mechanical properties and biodegradability, but low thermal stability under melt processing conditions. Composites of carbon nanotubes (CNTs) and cellulose derivatives are expected to present enhanced properties, depending on the effect of nanotubes on polymer structure and thermal properties. This work aims to investigate the influence of melt mixing on the stability of CA and its CNT composites. Composites with 0 wt%, 0.1 wt% and 0.5 wt% CNTs, as received and functionalized with pyrrolidine groups, were prepared using a batch mixer and an extruder. Chain scission of CA occurred during processing, but the effect was considerably reduced in the presence of CNTs. The incorporation of small amounts of CNTs (with or without functionalization) decreased polymer degradation by thermomechanical effects induced during polymer processing.
- Subjects
CELLULOSE acetate; CARBON nanotubes; NANOCOMPOSITE materials; THERMAL stability; PYRROLIDINE; BIODEGRADATION
- Publication
Journal of Polymer Engineering, 2016, Vol 36, Issue 9, p943
- ISSN
0334-6447
- Publication type
Article
- DOI
10.1515/polyeng-2015-0388