Study of the water uptake of polyamide 46 based copolymers by magnetic resonance imaging relaxometry

Magnetic resonance imaging, NMR relaxometry, thermal analysis and gravimetrical experiments are performed to study the water absorption by neat PA46 and copolymers of PA46 and PA4n with 4 mol% n=8, 12 and 16

Peter Adriaensens

2004

Scholarcy highlights

  • Magnetic resonance imaging, NMR relaxometry, thermal analysis and gravimetrical experiments are performed to study the water absorption by neat PA46 and copolymers of PA46 and PA4n with 4 mol% n=8, 12 and 16
  • The increased/ 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

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