Polyimide adhesive film with excellent comprehensive performance as well as preparation method and application thereof
A technology of polyimide film and comprehensive performance, applied in the field of polyimide, can solve the problems of low dielectric loss, low dielectric constant, etc. The effect of electrical loss
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Embodiment 1
[0052] In a three-necked flask equipped with a mechanical stirrer, a water separator, a nitrogen conduit, and a thermometer, add 38.54 grams (0.09 moles) of 1,4-bis(2-trifluoromethyl-4-aminophenoxy)benzene (6FAPB) , 8.00 grams (0.01 moles) of bis(3-aminopropyl) polydimethylsiloxane (PDMS) and 200 grams of N,N-dimethylacetamide (DMAc), stirred at room temperature under nitrogen protection until completely dissolved A homogeneous solution was obtained. Cool the above reaction system to 5°C, add 21.81 g (0.1 mole) of 1,2,4,5-pyromellitic anhydride (PMDA) and 187 g of DMAc, stir for 3 hours until completely dissolved, and continue stirring at room temperature After reacting for 14 hours, a polyamic acid solution with a solid content of 15 wt.% was obtained. After the obtained polyamic acid solution is filtered and vacuum defoamed, it is coated on a polytetrafluoroethylene board with a smooth surface, and most of the solvent is removed by heating at 60°C / 1.5 hours, and then peeled...
Embodiment 2
[0054] In a three-necked flask equipped with a mechanical stirrer, a water separator, a nitrogen conduit, and a thermometer, add 50.81 grams (0.098 moles) of 2,2-bis[4-(4-aminophenoxybenzene)]hexafluoropropane (HFBAPP) , 0.49 g (0.002 mol) of 1,3-bis(3-aminopropyl)-1,1,3,3-tetramethyldisiloxane (SiDA) and N,N-dimethylacetamide (DMAc ) 249 grams, stirred at room temperature under nitrogen protection until completely dissolved to obtain a homogeneous solution. Cool the above reaction system to 0°C, add 21.81 g (0.1 mole) of 1,2,4,5-pyromellitic anhydride (PMDA) and 200 g of DMAc, stir for 2 hours until completely dissolved, then continue stirring at room temperature After reacting for 11 hours, a polyamic acid solution with a solid content of 14 wt.% was obtained. After the obtained polyamic acid solution is filtered and vacuum defoamed, it is coated on a glass plate with a smooth surface, and most of the solvent is removed by heating at 80°C / 1 hour. Hold, and obtain a polyimi...
Embodiment 3
[0056] In a three-necked flask equipped with a mechanical stirrer, a water separator, a nitrogen conduit, and a thermometer, add 49.25 grams (0.095 moles) of 2,2-bis[4-(4-aminophenoxybenzene)]hexafluoropropane (HFBAPP) , 1.24 g (0.005 mol) of 1,3-bis(3-aminopropyl)-1,1,3,3-tetramethyldisiloxane (SiDA) and N,N-dimethylacetamide (DMAc ) 250 grams, stirred at room temperature under nitrogen protection until completely dissolved to obtain a homogeneous solution. Cool the above reaction system to 5°C, add 21.81 g (0.1 mole) of 1,2,4,5-pyromellitic anhydride (PMDA) and 129 g of DMAc, stir for 2 hours until completely dissolved, then continue stirring at room temperature After reacting for 10 hours, a polyamic acid solution with a solid content of 16 wt.% was obtained. After the obtained polyamic acid solution is filtered and vacuum defoamed, it is coated on a glass plate with a smooth surface, and most of the solvent is removed by heating at 70°C / 1.5 hours. Hold, and obtain a poly...
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