Solutions prepared by dissolving synthetic poly(p-phenyleneterephthalamide) (PPTA) in 99.8% H2SO4 were analyzed using natural abundance NMR methods as a function of the polymer concentration, molecular weight, and temperature. Concentration and molecular weight-driven transitions between isotropic, nematic, and solidlike phases could be clearly distinguished from the C-13 NMR spectra of the solute and from H-1 NMR spectra of the solvent. The C-13 solute NMR spectra point toward a distribution in the order parameter of the liquid crystalline director and could be quantitatively reproduced using C-13 Shielding tensor elements measured by solid NMR in polycrystalline PPTA. Thermodynamic parameters for the nematic reversible arrow isotropic equilibrium were obtained from the temperature dependence of the liquid crystalline C-13 NMR spectra, and 2D NMR methods were employed to retrieve information about the kinetics of PPTA and H2SO4 migration between isotropic and nematic domains. The results obtained from these spectroscopic studies compare well with briefly discussed.