CP/MAS C13-NMRによるエポキシ樹脂の硬化度評価

抄録

The dipolar-decoupled, natural abundans Fourier transform and cross-polarization C13-NMR spectra of epoxy resins have been obtained at 15 MHz, with about 2 KHz mechanical spinning at the magic angle.
It is shown that ¹H rotating-frame spin-lattice relaxation time constant (T^H_1ρ) is most usable. in monitoring the curing process of epoxy resins, especially at the first stage.
The T^H_1ρ due to aromatic carbons decreases in accordance with degree of cure.
Values of both Tg and T^H_1ρ of cured resins at the final stage are various by curing temperature.