Structural analysis of cross-linked poly(vinyl alcohol) using high-field DNP-NMR
Taiji Kanda, Mayuka Kitawaki, Toshiaki Arata, Yoh Matsuki, Toshimichi Fujiwara
Abstract
C NMR spectra reveal that the carbonyl of the acetoacetyl group of PVOH crosslinks with adipic hydrazide by forming an imine bond (>C[double bond, length as m-dash]N-) this study also shows that the product has only seven crosslinking sites per molecular chain with a polymerization degree of 1000 and is water resistant.
Topics & Concepts
Vinyl alcoholPolymerAqueous solutionMaterials scienceDouble bondPolymer chemistrySolid-state nuclear magnetic resonancePolyvinyl alcoholPolyurethaneChemical engineeringChemistryOrganic chemistryComposite materialEngineeringPhysicsNuclear magnetic resonanceAdvanced NMR Techniques and ApplicationsNMR spectroscopy and applicationsAdvanced MRI Techniques and Applications