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Please use this identifier to cite or link to this item: http://hdl.handle.net/1942/2432

Title: Study of the water uptake of polyamide 46 based copolymers by magnetic resonance imaging relaxometry
Authors: ADRIAENSENS, Peter
Rulkens, R
Litvinov, VM
Issue Date: 2004
Citation: POLYMER, 45(8). p. 2465-2473
Abstract: Magnetic resonance imaging (MRI), NMR relaxometry, thermal analysis and gravimetrical experiments are performed to study the water absorption by neat PA46 and copolymers of PA46 and PA4n (PA46-co-PA4n) with 4 mol% n = 8, 12 and 16. The observed reduction in water uptake, ingress rate and water molecular mobility with increasing value of n is explained by a combination of several physico-chemical molecular properties. The increased [CH2]/[amide] ratio and the reduced amount of crystallinity do not completely clarify the observed trends in water uptake and water molecular mobility in the copolymer series. It is shown that the increased chain mobility of the PA46 segments in the copolymers allows an improved coupling of the amide groups in the amorphous phase, explaining the observed decrease in water uptake. The important role of the morphology of the amorphous phase for water uptake is further demonstrated by annealing results and NMR relaxation experiments as a function of temperature. (C) 2004 Elsevier Ltd. All rights reserved.
Notes: Limburgs Univ Ctr, IMO, Div Chem, B-3590 Diepenbeek, Belgium. DSM Res BV, NL-6160 MD Geleen, Netherlands.Gelan, J, Limburgs Univ Ctr, IMO, Div Chem, Univ Campus, B-3590 Diepenbeek, Belgium.jan.gelan@luc.ac.be
URI: http://hdl.handle.net/1942/2432
DOI: 10.1016/j.polymer.2004.02.007
ISI #: 000220533500001
ISSN: 0032-3861
Category: A1
Type: Journal Contribution
Validation: ecoom, 2005
Appears in Collections: Research publications

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