Patent ID: 11879039
Assignee: HARBIN ENGINEERING UNIVERSITY
Field: Macromolecular chemistry, polymers (Chemistry)
Classification: CPC C | IPC C

Claim 6:
7. The preparation method for the thermoplastic multi-hybrid polyimide films according to claim 1, wherein the gradient heating curing in step S4 comprises a first gradient heating stage and a second gradient heating stage, the first gradient heating stage comprises: raising a temperature to 80-90° C., 100-110° C., and 130-140° C. in turn in the vacuum oven, and curing in each temperature section for 2-3 h at a vacuum degree being maintained at 75-85 kPa; the second gradient heating stage comprises: raising the temperature to 160-180° C., 190-210° C., 240-260° C., 290-310° C. and 320-340° C. in turn in the ordinary oven, and curing in each temperature section for 1-2 h.