Polyimide fiber spinning stock solution based on 2,2-bis[4-(2,4-diaminophenoxy) phenyl] propane and preparation method thereof
A technology of diaminophenoxy, polyimide fiber, applied in the direction of chemical characteristics of fibers, single-component synthetic polymer rayon, textiles and papermaking, etc., to achieve the effects of being conducive to industrialization, simple operation, and easy molecular weight
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[0037] Add 44.1 grams (0.1 moles) of 2,2-bis[4-(2,4-diaminophenoxy)phenyl]propane and 380 milliliters of N-methyl-2-pyrrolidone into the reaction kettle, stir and dissolve at room temperature Finally, add 29.6 grams (0.2 moles) of phthalic anhydride powder, stir and react for 0.5 hours, cool in an ice-water bath to below 5°C, add 15.5 grams (0.05 moles) of 3,3',4,4'-tetracarboxydi Phenylene ether dianhydride powder, stirred and reacted for 0.5 hours, then added 10.9 grams (0.05 moles) of pyromellitic dianhydride powder, kept the reaction temperature below 5°C, stirred and reacted for 2 hours, and obtained a homogeneous, transparent and viscous based 2,2-bis[4-(2,4-diaminophenoxy)phenyl]propane polyimide fiber spinning dope.
[0038] Using BROOKFIELD's CAP2000+ laminar viscometer to measure its viscosity at 80°C is 1825mPa.s.
[0039] Take an appropriate amount of the above-mentioned polyimide fiber spinning stock solution, apply it evenly on a clean flat glass sheet, put it i...
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