Letter |
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| Authors: | K. L. Mittal |
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| Affiliation: | 1. IBM GENERAL PRODUCTS DIVISION , San Jose , California , 95193 , U.S.A.;2. System Products Division , IBM Corporation , Poughkeepsie , N.Y. , 12602 |
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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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| Keywords: | Solid state NMR wood wood binder PMDI polyurethane |
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