Method for preparing aromatic polybenzimidazole resin film

A polybenzimidazole, resin film technology, applied in chemical instruments and methods, membrane technology, semi-permeable membrane separation and other directions, can solve problems that have not been reported in literature or patent reports, and achieve good solubility and film-forming performance, operation Convenient, high molecular weight effect
CN101456964AInactive Publication Date: 2009-06-17DONGHUA UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
DONGHUA UNIV
Publication Date
2009-06-17
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention relates to a preparation method for aromatic series polybenzimidazole resin film, comprising: (1) under function of polyphosphoric acid / phosphorus pentoxide system, condensation polymerization reaction is carried out to aromatic series amine and aromatic series dicarboxylic acids mixed according to mol ratio of 1:1 in nitrogen atmosphere; (2) after cooling, polymer is poured into water and broken down into powder in a resin pulper and washed over and over again by distilled water and soaked for 48 hours in NaHCO3 solution and washed till pH value shows neutral and drawn and filtered for drying in vacuum; (3) the polymer dried is dissolved in even solution prepared by organic solvent with mass percent of 5 percent, and then is dried at temperature of 130 DEG C for 12 hours, and is soaked in hot water for boiling and striping, and is dried in vacuum at temperature of 100 DEG C for 5 hours and then is obtained. The polybenzimidazole prepared by the invention has the advantages of big molecule weight, stable thermal stability, fine solubility and film forming performance, etc. The preparation has simple technology, low cost, convenient operation and can be finished in common equipments through preparation procedure.
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Description

technical field

[0001] The invention belongs to the field of preparation of polymer resin films, in particular to a preparation method of aromatic polybenzimidazole resin films. Background technique

[0002] Polybenzimidazole is a kind of polymer with excellent comprehensive properties. It has excellent heat resistance, low temperature resistance, mechanical properties and flame retardancy. At the same time, it also has excellent wear resistance, radiation resistance, acid and alkali resistance, etc. performance. Therefore, it is widely used in aviation, aerospace, optics, microelectronics and other high-tech fields. From the high-temperature resistant materials of spacecraft, satellites or space vehicles, to the composite materials of advanced structures in automobiles, electromechanical, etc., as well as the high-temperature resistant adhesives, and the proton exchange membranes of fuel cells, etc., there are good application prospects; therefore From cutting-edge techno...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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