Multifunctional Nuclear magnetic resonance

Crosslinked polymer networks formed from multifunctional acrylates are completely insoluble. Consequently, solid-state nuclear magnetic resonance (NMR) spectroscopy becomes an attractive method to determine the degree of crosslinking of such polymers (1-4). Solid-state NMR spectroscopy has been used to study the homopolymerization kinetics of various diacrylates and to distinguish between constrained and unconstrained, or unreacted double bonds in polymers (5,6). Solid-state NMR techniques can also be used to determine the domain sizes of different polymer phases and to determine the presence of microgels within a poly multiacrylate sample (7). The results of solid-state NMR experiments have also been correlated to dynamic mechanical analysis measurements of the glass transition (1,8,9) of various polydiacrylates. 

Nuclear magnetic resonance (NMR) spectroscopy is one of the other basic methods for structural analysis. Aluri et al. [16] proposed a one-pot synthesis route to obtain two polymers of ABB for linear polyester and hyperbranched poly(ester-urethane)s based on multifunctional L-amino acid monomers using a temperature-selective melt... 

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