A molecular weight controller having particular application in the polymerization of a lactam, i.e., epsiloncaprolactam, to a polyamide, i.e., poly(epsiloncaprolactam). The molecular weight controller comprises a primary monofunctional amine, i.e., benzylamine, a primary monofunctional acid, i.e., acetic acid, and a salified aminoacid containing an aromatic, a cyclohexane, or cyclopentane moiety, i.e., 4-(aminomethylbenzoic acid salified with p-toluenesulfonic acid. The resulting polyamide has a reduced water extractable content.
一种分子量控制器,特别适用于内酰胺(即epsiloncaprolactam)与聚酰胺(即 poly(epsiloncaprolactam))的聚合。分子量控制剂包括初级单官能胺(即
苄胺)、初级单官能酸(即
乙酸)和含有芳香族、
环己烷或
环戊烷分子的盐化
氨基酸(即用
对甲苯磺酸盐化的
4-氨甲基苯甲酸)。所得聚酰胺的
水萃取含量降低。