Please use this identifier to cite or link to this item: http://hdl.handle.net/1822/51409

TitleThe influence of melt mixing on the stability of cellulose acetate and its carbon nanotube composites
Author(s)Lima, Ana Luísa Delgado
Paiva, M. C.
Machado, A. V.
KeywordsCarbon nanotubes
Functionalization
Thermal properties
Degradation
Issue date2016
PublisherWalter de Gruyter GmbH
JournalJournal of Polymer Engineering
Abstract(s)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.
TypeArticle
URIhttp://hdl.handle.net/1822/51409
DOI10.1515/polyeng-2015-0388
ISSN2191-0340
Peer-Reviewedyes
AccessOpen access
Appears in Collections:IPC - Artigos em revistas científicas internacionais com arbitragem

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