Polyimide preparation method and application thereof
A technology of polyimide and polyamic acid, applied in the field of resin, can solve the problems of poor fluidity, insoluble and insoluble, application limitation, etc., and achieve the effect of improving solubility and solubility.
Inactive Publication Date: 2018-01-19
CHINA UNIV OF PETROLEUM (EAST CHINA)
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The invention provides a polyimide preparation method and an application thereof. The method comprises the following steps: 1) under inert gas protection, dissolving an aromatic diamine monomer 3, 3'-dimethyl-4,4'-diaminodiphenylmethane in a polar aprotic solvent to obtain an aromatic diamine monomer solution, then adding dianhydride in batch in the solution, and reacting the materials at the temperature of -20-40 DEG C to obtain an polyamide acid solution having viscosity; and 2) adding a chemical imidization reagent in the polyamide acid solution for a reaction to obtain a polyimide solution; wherein the chemical imidization reagent comprises a dehydrating agent and a catalyst. The polyimide is taken as a base material, an interfacial polymerization method is employed for preparing an organic solvent-resistant nanofiltration membrane, and the polyimide has the advantages of good stability, good mechanical property and excellent dissolvability.
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Property | Measurement | Unit |
Glass transition temperature | 275.0 | °C |
Tensile strength | 70.66 | mPa |
Glass transition temperature | 290.0 | °C |
tensile | MPa | |
Particle size | Pa | |
strength | 10 |
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