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

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

Document type :

Article dans une revue scientifique: Article original

DOI :

10.1002/app.48337

Permalink :

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

Title :

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

Author(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]

Journal title :

Journal of Applied Polymer Science

Abbreviated title :

J Appl Polym Sci

Volume number :

137

Pages :

48337

Publisher :

Wiley

Publication date :

2019-08-09

ISSN :

1097-4628

HAL domain(s) :

Chimie/Matériaux

English abstract : [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 ...
Show more >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.Show less >

Language :

Anglais

Audience :

Internationale

Popular science :

Non

Administrative institution(s) :

Université de Lille
CNRS
INRA
ENSCL

Collections :

Autres travaux scientifiques

Submission date :

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

Version history

Version	Link	Modification date
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

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