| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a polyamide 4 copolymer modified in material properties (mechanical property and thermal property) by controlling a polymeric chain structure and a polymeric chain composition, and to provide its production method. <P>SOLUTION: There is provided a method for obtaining the polyamide 4 copolymer including a structure derived from an initiator by carrying out copolymerization withε-caprolactam using a basic polymerization catalyst and the initiator with a branch structure of two or more branches in polymerizing 2-pyrrolidone and the polyamide 4 copolymer having a special structure including a structure derived from the initiator, obtained by polymerization withε-caprolactam using the basic polymerization catalyst and the initiator having the branch structure of two or more branches in polymerizing 2-pyrrolidone. <P>COPYRIGHT: (C)2013,JPO&INPIT</p> |
