Polyimide fiber spinning solution based on 2, 2-double [4-(2, 4-diaminophenoxy) phenyl group] hexafluoropropane and preparation method thereof

Abstract

The invention relates to a polyimide fiber spinning solution based on 2, 2-double [4-(2, 4-diaminophenoxy) phenyl group] hexafluoropropane and a preparation method thereof. The structural formula of components of the spinning solution is shown as below. The preparation method includes adding the 2, 2-double [4-(2, 4-diaminophenoxy) phenyl group] hexafluoropropane and a high-polar aprotic organic solvent into a reaction kettle, stirring for dissolution at the room temperature, adding phthalic anhydride, stirring for reaction for half an hour, cooling until the temperature is under 5 DEG C through an ice-water bath, adding 3, 3', 4, 4'-tetracarboxy benzophenone dianhydride, stirring for reaction for half an hour, adding pyromellitic dianhydride, maintaining the reaction temperature under 5 DEG C, and obtaining the solution after stirring for reaction for 2-4 hours. The polyimide fiber spinning solution based on the 2, 2-double [4-(2, 4-diaminophenoxy) phenyl group] hexafluoropropane and the preparation method thereof have the advantages that molecular weight of resin is easy to control, molecular structure is easy to regulate, preparation of high-performance polyimide fibers is facilitated, reaction condition of the preparation method is mild, and industrialization of products is facilitated.

Description

technical field [0001] The invention belongs to the field of polyimide fiber spinning stock solution and its preparation, in particular to a polyimide based on 2,2-bis[4-(2,4-diaminophenoxy)phenyl]hexafluoropropane Amine fiber spinning dope and its preparation method. Background technique [0002] Polyimide is a kind of polymer material with excellent comprehensive properties. It has particularly excellent heat resistance, low temperature resistance, flame retardancy, electrical properties and mechanical properties. It is widely used in electronic microelectronics, aerospace, High-tech fields such as lasers and optoelectronics. [0003] There have been many reports on the research and development work in the field of polyimide resins: [0004] Chinese invention patent CN101265328A discloses a preparation method of a negative photosensitive polyimide based on 2,2-bis[4-(2,4-diaminophenoxy)phenyl]hexafluoropropane. The preparation method uses 2,2-bis[4-(2,4-diaminophenoxy)p...

AI Technical Summary

Problems solved by technology

[0023] At present, developed countries such as the United States and Russia are stepping up research on polyimide fibers. Because high-strength and high-modulus polyimide fibers are reinforcing agents for advanced composite materials, they are used in the manufacture of aviation, spacecraft and rockets. There are few, but the research on this fiber in developed countries has never been interrupted