POLYAMIDE AND PREPARATION PROCESS OF POLYAMIDE

摘要

PROBLEM TO BE SOLVED: To provide a polyamide having excellent mechanical, physical and chemical properties and to provide a preparation process of this polyamide and various parts from this polyamide. SOLUTION: This polyamide has a low viscosity decomposition after re- melting and can be prepared by the anion polymerization of a lactam in the presence of an alkali catalyst and optionally an activator. The preparation process of the polyamide is this process. A process for re-processing an anion- prepared polyamide is also provided.