| 摘要 |
A compsn. suitable for admixing with a C3-12 lactam magnesium halide (LMH) catalyst to provide an admixt. which polymerises to form a nylon-6 blcok copolymer, comprises (A) epsilon-caprolactam, (B) an initiator (or its precursor) being capped with at least one activatied gp. capable of initiating epsilon-caprolactam polymerisation in the presence of the catalyst and providing elastomeric segments to the nylon-6 block copolymer when it is incorporated in it, and (C) 2-oxo-1-pyrrolidinyl gps. (OPG) present in the compsn. as 2-pyrrolidinone or as the activated gps. of the initiator. The concn. of OPG is about 0.05-2 equivs. per equiv. of (B).
|
