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Please use this identifier to cite or link to this item: http://hdl.handle.net/1942/2255

Title: Solid-state NMR relaxometry study of phenolic resins
Authors: ADRIAENSENS, Peter
REGO, Robby
CARLEER, Robert
OTTENBOURGS, Benjamin
GELAN, Jan
Issue Date: 2003
Publisher: JOHN WILEY & SONS LTD
Citation: POLYMER INTERNATIONAL, 52(10). p. 1647-1652
Abstract: H-1 wideline and C-13 CP/MAS spin-lattice (T-1H) relaxation solid-state NMR experiments have been performed in order to investigate the cure state of phenolic novolac resins. Due to the process of spin diffusion, a single averaged T-1H decay time was found which was sensitive to the cure state of the network structure. Measurements as a function of temperature revealed that mobile end-groups and branches determine the most efficient pathway of T-1H relaxation. Combined with FTIR measurements, it is shown that rearrangements of the hydrogen bond structure take place upon heating-cooling. There are strong indications that the process of disruption-reformation of the hydrogen bonds is not completely reversible. (C) 2003 Society of Chemical Industry.
Notes: Univ Limburg, IMO, Dept SBG, B-3590 Diepenbeek, Belgium.Gelan, J, Univ Limburg, IMO, Dept SBG, Univ Campus,Gebouw D, B-3590 Diepenbeek, Belgium.
URI: http://hdl.handle.net/1942/2255
DOI: 10.1002/pi.1351
ISI #: 000185669500016
ISSN: 0959-8103
Category: A1
Type: Journal Contribution
Validation: ecoom, 2004
Appears in Collections: Research publications

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