Determination of extent of reaction in poly(mono- and dimethacrylates) using n.m.r. Comparison of solid-state and solution-state methods

Abstract

The extent of reaction in lightly cross-linked poly(mono- and dimethacrylates) has been determined using solid- and liquid-state 13C n.m.r. Three methods were used: (i) magic-angle spinning (MAS) with high-power decoupling of the solid; (ii) conventional liquid-state high-resolution n.m.r. of the samples swollen by CDCl 3; (iii) m.a.s. of the swollen samples. The three methods give comparable results, indicating that motional factors which may affect the solid-state method are not significant.