Abstract
Abstract Poly(methyl acrylate) radical and poly(methyl acrylate-α-d) radical, generated from the polymerization of methyl acrylate (MA) and methyl acrylate-α-d (MA-d) in the frozen (solid) state, have been investigated by Electron Spin Resonance (ESR). The α-position selective deuteration of poly(MA) radical made the shoulders of poly(MA) radical emerge as more clearly isolated peaks. Both ESR spectra of poly(MA) radicals and those of poly(MA-d) radicals were simulated for the conformational ratio 2.2 between a stable conformation and eclipsed conformations. The energy difference between the stable conformation and two eclipsed conformations was estimated to be 0.27 kcal mol−1 for poly(MA) radical in the thermal equilibrium solid state.
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