Increase in the melting point and the enthalpy of melting of polyamides by a water treatment

摘要

A method for increasing at least one of the following two parameters of a polyamide: (I) its melting point and (ii) its enthalpy of melting ΔH_m, in which:this polyamide is brought into contact in the solid state with water or with steam at a temperature close to its crystallization temperature T_c for a time long enough to effect this increase;then, the water (or steam) is separated from the polyamide and the polyamide is dried.