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Thermosetting polymer compound, poly-half-amide supermolecular film and preparation method thereof

A thermosetting and supramolecular technology, applied in the field of thermosetting polysemiamide supramolecular films and their preparation, can solve problems such as inability to recycle, incapable of melting and plasticizing, environmental pollution, etc., achieve excellent mechanical properties, and avoid complex product structures.

Active Publication Date: 2015-05-27
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, compared with thermoplastic polymer materials, thermosetting polymer materials generally form prepolymers first, and the potential functional groups in them continue to react to form a cross-linked structure and solidify during molding. This transformation is irreversible and cannot be melted and plasticized when heated. Insoluble in solvents and cannot be recycled
Waste is usually disposed of as landfill or incineration, which not only causes a huge waste of resources, but also brings serious environmental pollution

Method used

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  • Thermosetting polymer compound, poly-half-amide supermolecular film and preparation method thereof
  • Thermosetting polymer compound, poly-half-amide supermolecular film and preparation method thereof
  • Thermosetting polymer compound, poly-half-amide supermolecular film and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0032] 16mmol of paraformaldehyde and 8ml of N-methylpyrrolidone / water mixed solvent were prepared into a suspension, stirred and reacted at 80°C for 0.5 hour for depolymerization, and cooled to room temperature to obtain a formaldehyde reaction liquid. Dissolve 8 mmol of aromatic diamine BAPP in 4 ml of N-methylpyrrolidone to obtain an aromatic amine reaction liquid. Mix the reaction solution of formaldehyde and aromatic amine evenly (the volume content of water in the mixed solvent of the final reaction system is 5%), stir and react at 50°C for 30 minutes for pre-polymerization, further spread film on a horizontal glass plate, and dry at 50°C After 24 hours, the target product was obtained as a colorless transparent film. The light transmittance is 94%, Young's modulus, tensile strength, elongation at break and tensile energy at break are respectively 3.8GPa, 82.7MPa, 3.1%, 1.3MJ / m 3 (See figure 1 , film dumbbell tensile specimen and representative stress-strain curve (a))...

Embodiment 2

[0034] 10mmol of paraformaldehyde and 10ml of dimethylformamide / water mixed solvent were prepared into a suspension, stirred and reacted at 100°C for 0.1 hour for depolymerization, and cooled to room temperature to obtain a formaldehyde reaction liquid. Dissolve 5 mmol of aromatic diamine MDA in 10 ml of dimethylformamide to obtain an aromatic amine reaction solution. Mix the formaldehyde and aromatic amine reaction solution evenly (the volume content of water in the mixed solvent of the final reaction system is 10%), stir and react at 80°C for 3 minutes for pre-polymerization, further spread film on a horizontal glass plate, and dry at 40°C After 48 hours, the target product was obtained as a colorless transparent film. The light transmittance is 97%, Young's modulus, tensile strength, elongation at break and tensile energy at break are respectively 5.7GPa, 72.5MPa, 2.4%, 0.87MJ / m 3 . After soaking each gram of film in 10ml, 0.5mol / L hydrochloric acid for 6 hours, neutraliz...

Embodiment 3

[0036] 8 mmol of paraformaldehyde and 15 ml of dimethyl sulfoxide / water mixed solvent were prepared into a suspension, stirred and reacted at 60° C. for 2 hours for depolymerization, and cooled to room temperature to obtain a formaldehyde reaction liquid. Dissolve 4 mmol of aromatic diamine DPTP in 4 ml of dimethyl sulfoxide to obtain an aromatic amine reaction solution. Mix the formaldehyde and aromatic amine reaction liquid evenly (the volume content of water in the mixed solvent in the final reaction system is 15%), stir and react at 65°C for 5 minutes for pre-polymerization, further spread film on a horizontal glass plate, and dry at 80°C After 12 hours, the target product was obtained as a colorless transparent film. The light transmittance is 96%, Young's modulus, tensile strength, elongation at break and tensile energy at break are respectively 3.5GPa, 96.7MPa, 3.4%, 1.7MJ / m 3 . After soaking each gram of film in 15ml, 0.8mol / L nitric acid for 10 hours, and then neutr...

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Abstract

The invention belongs to the field of thermosetting polymer materials, and in particular relates to a thermosetting polymer compound, a poly-half-amide supermolecular film and a preparation method thereof. The preparation method comprises the following steps: (1), preparing a paraformaldehyde and nonprotic / water mixed solvent into a suspension, depolymerising, and cooling to room temperature to obtain a formaldehyde reaction solution; (2), dissolving aromatic diamine and / or aromatic triamine in a nonprotic solvent to obtain an aromatic amine reaction solution; and (3), uniformly mixing formaldehyde with the aromatic amine reaction solution, pre-polymerizing, further spreading a film on a horizontal glass plate, and drying and solidifying so as to obtain the film. The film is adjustable in thickness, colourless and transparent; the light transmittance is greater than 90%; the Young modulus, the tensile strength, the breakage elongation and the tensile failure energy of the film can respectively achieve 3-6 GPa, 70-100 MPa, 2-5% and 0.7-2.5 MJ / m<3>; aromatic amine serving as the main raw material in the film can be recycled; and the recovery rate can be above 95%.

Description

technical field [0001] The invention relates to the field of thermosetting polymer materials, in particular to a recyclable thermosetting polysemiamide supramolecular film and a preparation method thereof. Background technique [0002] Thermosetting polymer materials have the characteristics of high specific strength and specific stiffness, good corrosion resistance, and stable structure and size. They have been widely used in high-tech fields such as electronic information, aerospace, wind power, and transportation. However, compared with thermoplastic polymer materials, thermosetting polymer materials generally form prepolymers first, and the potential functional groups in them continue to react to form a cross-linked structure and solidify during molding. This transformation is irreversible and cannot be melted and plasticized when heated. Insoluble in solvents and cannot be recycled. Waste is usually treated as landfill or incineration, which not only causes a huge wast...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J5/18C08L61/22C08G12/08
Inventor 袁彦超严石静孙艳晓赵建青刘述梅陆涛
Owner SOUTH CHINA UNIV OF TECH
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