公开(公告)号：US11879039B1

公开(公告)日：2024-01-23

申请号：US18233907

申请日：2023-08-15

Applicant: Harbin Engineering University

Inventor： Gaohui Sun ,  Kangkang Tao ,  Shihui Han ,  Rongrong Chen ,  Jun Wang

IPC: C08G73/10 ,  C08J5/18 ,  C08J3/00 ,  C08J3/24

CPC classification number: C08J5/18 ,  C08G73/1007 ,  C08G73/1035 ,  C08G73/1067 ,  C08J3/005 ,  C08J3/247 ,  C08J2379/08

Abstract: A preparation method for thermoplastic multi-hybrid polyimide films is provided. The method includes the following steps: S1, adding an aromatic diisocyanate to an aromatic dianhydride solution system to obtain an anhydride-terminated polyimide precursor solution containing a seven-membered ring structure named a first solution; S2, adding an aromatic dianhydride to an aromatic diamine solution system to obtain an amino-terminated polyamic acid solution named a second solution; S3, mixing the first solution and the second solution to obtain a uniform multi-polymerization solution; S4, after extending the multi-polymerization solution to form a film, carrying out a gradient heating curing in a vacuum oven and an ordinary oven respectively to obtain a thermoplastic multi-hybrid polyimide film after cooling. The invention prepares a thermoplastic multi-hybrid polyimide film with better comprehensive performance rapidly, the preparation process is simple, and the production cost is effectively reduced.