Solid State NMR Studies of Polymeric Diphenylmethane Diisocyanate (PMDI) Derived Species in Wood
1999; Taylor & Francis; Volume: 71; Issue: 4 Linguagem: Inglês
10.1080/00218469908014549
ISSN1563-518X
AutoresShanci Bao, William A. Daunch, Yahong Sun, Peter L. Rinaldi, J. J. Marcinko, Chris Phanopoulos,
Tópico(s)Solid-state spectroscopy and crystallography
ResumoAbstract 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. Key Words: Solid state NMRwoodwood binderPMDIpolyurethane
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