Rheological study of quaternary ammonium‐containing star‐shaped polylactic acid

Belkhir, Kedafi; Majesté, Jean‐Charles; Jegat, Corinne; Taha, Mohamed

Type de document :

Article dans une revue scientifique: Article original

DOI :

10.1002/app.48337

URL permanente :

http://hdl.handle.net/20.500.12210/56027

Titre :

Rheological study of quaternary ammonium‐containing star‐shaped polylactic acid

Auteur(s) :

Belkhir, Kedafi [Auteur]
Unité Matériaux et Transformations (UMET) - UMR 8207
Majesté, Jean‐Charles [Auteur]
Ingénierie des Matériaux Polymères [IMP]
Jegat, Corinne [Auteur]
Ingénierie des Matériaux Polymères [IMP]
Taha, Mohamed [Auteur]
Ingénierie des Matériaux Polymères [IMP]

Titre de la revue :

Journal of Applied Polymer Science

Nom court de la revue :

J Appl Polym Sci

Numéro :

137

Pagination :

48337

Éditeur :

Wiley

Date de publication :

2019-08-09

ISSN :

1097-4628

Discipline(s) HAL :

Chimie/Matériaux

Résumé en anglais : [en]

Quaternary ammonium-containing star-shaped polylactic acid (PLA-Q) is analyzed in melt rheology and found to follow a clustering behavior. The viscosity of this polymer is largely higher than its analog, of the same ...
Lire la suite >Quaternary ammonium-containing star-shaped polylactic acid (PLA-Q) is analyzed in melt rheology and found to follow a clustering behavior. The viscosity of this polymer is largely higher than its analog, of the same structure, without ammonium ions. This difference is attributed to physical interactions taking place between the ammoniums and hindering the flow of the melt polymer. The frequency sweeps of the storage (G′) and loss (G′′) modulus of the melt PLA-Q are achieved at different temperatures and different shearing times. The iso-temperature and iso-time superposition of the resulting curves were achieved using, respectively, a temperature and a time shift factors, this superposition allowed the determination of the flow activation energy; its value corresponds to an ionic process confirming the ionic interactions. When the two shift factors are used simultaneously, a unique master curve of both G′ and G′′ is obtained; this curve follows the Rouse model indicating the presence of two types of ionic associations within the melt polymer: a large number of multiplets having small size and a small number of clusters of larger size.Lire moins >

Langue :

Anglais

Audience :

Internationale

Vulgarisation :

Non

Établissement(s) :

Université de Lille
CNRS
INRA
ENSCL

Collections :

Autres travaux scientifiques

Date de dépôt :

2021-11-02T15:34:16Z
2021-11-08T09:50:56Z
2021-11-08T10:03:55Z
2021-11-08T10:15:49Z

Historique des modifications

Numéro de version	Lien	Date de modification
5	20.500.12210/56027*	2021-11-08T10:15:34Z
4	20.500.12210/56027.4	2021-11-08T09:59:10Z
3	20.500.12210/56027.3	2021-11-08T08:00:08Z
1	20.500.12210/56027.1	2021-11-02T15:34:16Z

*Version sélectionnée

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