Journal Article

IMPULSE-2016-00080

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Effect of polar solvents on the crystalline phase of polyamides

Laurati, M. (Corresponding author) ; Arbe, A. ; Rios de Anda, A. ; Fillot, L.-A. ; Sotta, P.

2014
Elsevier Science Oxford

Please use a persistent id in citations: doi:10.1016/j.polymer.2014.04.031

Abstract: We investigate the effect of absorption of polar solvents (water and ethanol) on the structure of amorphous and semi-crystalline copolyamides containing aromatic entities. Different length scales of structural organisation are probed using a combination of Small angle X-ray scattering and neutron/X-rays diffraction. Crystallisation in the presence of solvent, characterised by very slow kinetics, is observed in the originally amorphous material, as a combined effect of a rearrangement of the hydrogen-bond distribution and plasticization. The steady-state crystalline structure is reached on a timescale much longer than the absorption kinetics, and is similar but not identical to that of processed semi-crystalline materials. In semi-crystalline polyamides water absorption induces a swelling of the spacing of the lamellar stacking but also modifications of the unit cell structure, which suggest a moderate but significant rearrangement of the hydrogen bond structure in the crystalline phase.

Keyword(s): Polymers, Soft Nano Particles and Proteins (1st) ; Key Technologies (1st) ; Soft Condensed Matter (2nd)

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Contributing Institute(s):

1. DNS

Experiment(s):

1. DNS: Diffuse scattering neutron time of flight spectrometer (NL6S)

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Database coverage:
; Current Contents - Physical, Chemical and Earth Sciences ; IF < 5 ; JCR ; SCOPUS ; Science Citation Index ; Science Citation Index Expanded ; Thomson Reuters Master Journal List ; Web of Science Core Collection

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