A kind of polyimide composite film and preparation method thereof
A polyimide, composite film technology, applied in chemical instruments and methods, flat products, other household appliances, etc., to achieve good bonding effect
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Embodiment 1
[0078] The preparation method of polyimide composite film comprises the following steps:
[0079] (1) Under the condition of normal pressure filled with nitrogen in the stirred tank at 35°C, first dissolve 4,4'-diaminodiphenyl ether and p-phenylenediamine in dimethylacetamide solvent, and then add pyromellitic tetra Formic acid dianhydride is polymerized, and the reaction time is 4 hours. The molar ratio of pyromellitic dianhydride: 4,4'-diaminodiphenyl ether: p-phenylenediamine is 1.00:0.50:0.502, and the average particle size is 3 μm Ultrasonic mixing of mica powder pre-dispersion, the amount of mica powder added accounted for 1wt% of the total amount of dianhydride monomers and diamine monomers, to obtain polyamic acid glue A;
[0080] (2) Under the condition of normal pressure filled with nitrogen in the stirred tank at 35°C, first dissolve 4,4'-diaminodiphenyl ether and p-phenylenediamine in dimethylacetamide solvent, and then add pyromellitic tetra Formic acid dianhydri...
Embodiment 2
[0085] The preparation method of polyimide composite film comprises the following steps:
[0086] (1) Under the condition of normal pressure filled with nitrogen in the stirred tank at 35°C, first dissolve 4,4'-diaminodiphenyl ether and p-phenylenediamine in dimethylacetamide solvent, and then add pyromellitic tetra Formic acid dianhydride is polymerized, and the reaction time is 4 hours. The molar ratio of pyromellitic dianhydride: 4,4'-diaminodiphenyl ether: p-phenylenediamine is 1.00:0.50:0.502, and the average particle size is 2 μm Ultrasonic mixing of mica powder pre-dispersion, the amount of mica powder added accounted for 2wt% of the total amount of dianhydride monomers and diamine monomers, to obtain polyamic acid glue A;
[0087] (2) Under the condition of normal pressure filled with nitrogen in the stirred tank at 35°C, first dissolve 4,4'-diaminodiphenyl ether and p-phenylenediamine in dimethylacetamide solvent, and then add pyromellitic tetra Formic acid dianhydri...
Embodiment 3
[0092] The preparation method of polyimide composite film comprises the following steps:
[0093] (1) Under the condition of normal pressure filled with nitrogen in the stirred tank at 35°C, first dissolve 4,4'-diaminodiphenyl ether and p-phenylenediamine in dimethylacetamide solvent, and then add pyromellitic tetra Formic acid dianhydride is polymerized, and the reaction time is 4 hours. The molar ratio of pyromellitic dianhydride: 4,4'-diaminodiphenyl ether: p-phenylenediamine is 1.00:0.50:0.502, and the average particle size is 6 μm Ultrasonic mixing of mica powder pre-dispersion, the amount of mica powder added accounted for 1wt% of the total amount of dianhydride monomers and diamine monomers, to obtain polyamic acid glue A;
[0094] (2) Under the condition of normal pressure filled with nitrogen in the stirred tank at 35°C, first dissolve 4,4'-diaminodiphenyl ether and p-phenylenediamine in dimethylacetamide solvent, and then add pyromellitic tetra Formic acid dianhydri...
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