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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
chemistry
Reactive extrusion of PLA, PBAT with a multi-functional epoxide: Physico-chemical and rheological properties
European Polymer Journal, Volume 58, Year 2014
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Description
The aim of this work was to highlight the presence of long chain branching, LCB, due to the incorporation of a multifunctional epoxide, named Joncryl ®, as a chain extender, into both poly (lactic acid) (PLA) and poly (butylene-adipate-co-terephtalate) (PBAT) polymers. The modified polymers were prepared using a twin-screw reactive extrusion system. It has been demonstrated through this study that these modified biopolymers are thermo-rheologically complex. This complexity may be attributed to the formation of covalent bonds between both polymer and chain extender and leads to a failure of the time-temperature superposition (TTS). The linear viscoelastic properties were predicated on the use of the so-called Van-Gurp-Palmen plots, from which the topology of the modified PLA and PBAT has been studied and analyzed. Indeed, they exhibited a typical feature of a mixture of linear and randomly branched polymers. Furthermore, the resulting linear and branched chains, due to the reactive highly functionalized epoxide, are discussed using rheological investigations (relaxation spectra, flow activation energy) coupled with solution viscometry (solution viscometry properties, hydrodynamic radius) and physico-chemical properties (size-exclusion chromatography).© 2014 Elsevier Ltd. All rights reserved.
Authors & Co-Authors
Al-Itry, Racha
France, Villeurbanne
Insa Lyon
France, Villeurbanne
Ingénierie Des Matériaux Polymères
Lamnawar, Khalid
France, Villeurbanne
Insa Lyon
France, Villeurbanne
Laboratoire de Mécanique Des Contacts et Des Structures
Maazouz, Abderrahim
France, Villeurbanne
Insa Lyon
France, Villeurbanne
Ingénierie Des Matériaux Polymères
Morocco, Rabat
Al Akhawayn University, Hassan Ii Academy of Sciences and Technology
Statistics
Citations: 174
Authors: 3
Affiliations: 4
Identifiers
Doi:
10.1016/j.eurpolymj.2014.06.013
ISSN:
00143057