• Nylon-6;
  • limiting viscosity;
  • radius of gyration;
  • onset of precipitation;
  • nonsolvent and solvent blends


The dissolution of nylon-6 has been made effective by adding a nonsolvent to the primary solvents that in turn created potential combined contact sites and enhanced the process of dissolution. It is found that 50% of a primary solvent like m-cresol or phenol could be replaced by solvents that are relatively economical and safe to handle. Nylon-6 is found to get dissolved at a faster rate and with ease in a blend of 45 : 55 phenol-toluene compared to other solvent blends. The dependence of limiting viscosity on solute-binary solvent interactions is used as a measure of the solvency power of solvent blends for nylon. The lowering of temperature is found to favour the dissolution of nylon-6 in m-cresol. Its dissolution is found to be optimum in phenol at 55°C and further increase in temperature has adverse effects on it.