Title :

Confinement and Distribution of the Composition in Semicrystalline/Amorphous Miscible Blends of PEKK/PEI: A Calorimetry Study

Author(s) :

Belguise, Aude [Auteur]
Cantournet, Sabine [Auteur]
Fabre, Victor [Auteur]
Le gorju, Karine [Auteur]
Gaucher, Valerie [Auteur]
Unité Matériaux et Transformations - UMR 8207 [UMET]
Tahon, Jean-Francois [Auteur]
Unité Matériaux et Transformations - UMR 8207 [UMET]
Bresson, Bruno [Auteur]
Fretigny, Christian [Auteur]
Lequeux, François [Auteur]
Montes, Helene [Auteur]

Journal title :

Macromolecules

Abbreviated title :

Macromolecules

Volume number :

54

Pages :

7364-7376

Publisher :

American Chemical Society (ACS)

Publication date :

2021-08-06

ISSN :

0024-9297

English keyword(s) :

Crystallization
Glass transition
Polyethylenimine
Quantum confinement
Phase transitions

HAL domain(s) :

Chimie/Polymères
Chimie

English abstract : [en]

By combining small-angle X-ray scattering and differential scanning calorimetry measurements, we analyze the widening of the glass transition measured for miscible mixtures of semicrystalline PEKK chains and fully amorphous ...
Show more >By combining small-angle X-ray scattering and differential scanning calorimetry measurements, we analyze the widening of the glass transition measured for miscible mixtures of semicrystalline PEKK chains and fully amorphous PEI chains. The calorimetric analysis reveals that the amorphous interlamellar phase is subject to confinement effects. In addition, we measure wide composition distributions for the amorphous interlamellar and interfibrillar phases. We quantitatively identify, through careful analysis of the signals, the fraction and average composition of each amorphous phase and the composition distribution. We conclude that the final distribution of the polymer chains that do not crystallize in the interlamellar and interfibrillar phases results from the crystallization dynamics of the mixtures.Show less >

Language :

Anglais

Peer reviewed article :

Oui

Audience :

Internationale

Popular science :

Non

Administrative institution(s) :

Université de Lille
CNRS
INRAE
ENSCL

Collections :

• Unité Matériaux et Transformations (UMET) - UMR 8207

Research team(s) :

Ingénierie des Systèmes Polymères

Submission date :

2023-12-08T12:16:38Z
2023-12-08T16:04:03Z