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The Journal of Adhesion Volume 71, 1999 - Issue 4
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Original Articles

Solid State NMR Studies of Polymeric Diphenylmethane Diisocyanate (PMDI) Derived Species in Wood

Shanci Bao Department of Chemistry, The University of Akron, Akron, OH, 44325-3601, USA
,
William A. Daunch Department of Chemistry, The University of Akron, Akron, OH, 44325-3601, USA
,
Yahong Sun Department of Chemistry, The University of Akron, Akron, OH, 44325-3601, USA
,
Peter L. Rinaldi Department of Chemistry, The University of Akron, Akron, OH, 44325-3601, USA
,
Joseph J. Marcinko ICI Polyurethanes, 286 Mantua Grove Road, West Deptford, NJ, 08066, USA
&
Chris Phanopoulos ICI Polyurethanes, Everslaan, 45-B-3078, Everberg, Belgium
Pages 377-394 | Received 06 Apr 1999, Accepted 25 Aug 1999, Published online: 23 Sep 2006
 
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Abstract

15N variable contact time (VCT) cross polarization magic angle spinning (CPMAS) NMR experiments were employed to investigate the reaction products formed in wood composites bonded with 15N-enriched polymeric diphenylmethane diisocyanate (PMDI)-based adhesives. Two wood species were studied. Aspen (Populus tremuloides) and Southern Pine (Pinus sylvestris). The influence of temperature and wood moisture content on the distribution of PMDI-derived species are presented and discussed.

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