A process for the fabrication of a polyamide article is disclosed, in which a composition of a linear aliphatic polyamide, 0.01-5% by weight of an epoxide and 0.005-1.0% by weight of a catalyst selected from catalysts of the type used in the polymerization of polyamides and epoxide ring-opening compounds is admixed in a manner that provides an effectively uniform admixture and extruded. The epoxide compounds have at least two terminal epoxy groups and a molecular weight of less than 1000. A preferred catalyst is sodium hypophosphite. Increases in melt viscosity of the polyamide in excess of four-fold may be obtained. The compositions may be used in the formation of film by a blown film process, the blow moulding of bottles, thermoforming processes or the like.
本发明公开了一种制造聚酰胺制品的工艺,在该工艺中,线性脂肪族聚酰胺、0.01-5%(重量)的
环氧化物和 0.005-1.0%(重量)的催化剂(选自聚酰胺和
环氧化物开环化合物聚合过程中使用的催化剂)组成的混合物以提供有效均匀混合物的方式混合并挤出。环氧化合物至少有两个末端环氧基团,分子量小于 1000。首选催化剂是
次磷酸钠。聚酰胺的熔融粘度可提高四倍以上。这些组合物可用于吹膜工艺、吹塑瓶子、热成型工艺或类似工艺中形成薄膜。