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Preparation method of multi-arm star polyamide polymer

A polymer and multi-armed star technology, which is applied in the field of preparation of multi-armed star-shaped polyamide polymers, to achieve the effects of flexible and adjustable structure, mild reaction conditions, and wide sources

Active Publication Date: 2012-05-30
SHANGHAI GENIUS ADVANCED MATERIAL (GRP) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

So so far, there are few reports on multi-armed star polyamide polymers

Method used

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  • Preparation method of multi-arm star polyamide polymer

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Effect test

Embodiment 1

[0026] 0.03 mol of 1,2,4-benzenetricarboxylic anhydride, 15 mol of caprolactam, and 500 ml of deionized water (33% of the total feeding weight) were put into a 5L autoclave at one time. After repeated replacement of nitrogen three times, the nitrogen atmosphere in the reaction kettle was ensured. Then raise the temperature of the reactor to 240° C., adjust the pressure to be constant at 2.0 MPa, keep the temperature for 30 minutes, and turn on the stirring device of the reactor after the materials are completely melted. After reacting for 10 hours, release the pressure, and vacuumize to keep the pressure in the kettle lower than 1×10 -5 After MPa, keep the pressure constant for 20 minutes. Finally, high-pressure nitrogen was filled to make the pressure in the kettle reach 2.0MPa, and the polymer in the reactor was extruded, cooled with water, and then granulated, and vacuum-dried at 100°C for 24 hours to obtain three-armed star-shaped PA6. The characterization of this star p...

Embodiment 2

[0028] 0.36 mol of 1,2,4-benzenetricarboxylic anhydride, 15 mol of caprolactam, and 500 ml of deionized water (33% of the total feeding weight) were put into a 5L autoclave at one time. After repeated replacement of nitrogen three times, the nitrogen atmosphere in the reaction kettle was ensured. Then raise the temperature of the reactor to 240° C., adjust the pressure to be constant at 2.0 MPa, keep the temperature for 30 minutes, and turn on the stirring device of the reactor after the materials are completely melted. After reacting for 10 hours, release the pressure, and vacuumize to keep the pressure in the kettle lower than 1×10 -4 After MPa, keep the pressure constant for 20 minutes. Finally, high-pressure nitrogen was filled to make the pressure in the kettle reach 1.8MPa, and the polymer in the reactor was extruded and cooled with water, then granulated, and vacuum-dried at 100°C for 24 hours to obtain three-armed star-shaped PA6. The characterization of this star po...

Embodiment 3

[0030] 0.02 mol of pyromellitic dianhydride, 8 mol of aminoundecanoic acid, and 320 ml of deionized water (20% of the total feeding weight) were thrown into a 5L autoclave at one time. After repeated replacement of nitrogen three times, the nitrogen atmosphere in the reaction kettle was ensured. Then raise the temperature of the reactor to 230° C., adjust the pressure to be constant at 1.8 MPa, keep the temperature for 30 minutes, and turn on the stirring device of the reactor after the materials are completely melted. After reacting for 10 hours, release the pressure, and vacuumize to keep the pressure in the kettle lower than 1×10 -5 After MPa, keep the pressure constant for 20 minutes. Finally, high-pressure nitrogen was filled to make the pressure inside the kettle reach 2.0MPa. The polymer in the reactor was extruded and cooled with water, then granulated, and vacuum-dried at 100°C for 24 hours to obtain four-armed star-shaped PA11. The characterization of this star pol...

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Abstract

The method belongs to the technical field of polymeric material and specifically relates to a preparation method of a multi-arm star polyamide polymer. The method of the invention comprises the following steps: placing monomer, initiator 0.2-20% of a mole of the monomer and water 10-50 wt% of the monomer into a high pressure reaction kettle; sealing; filling the reaction kettle with nitrogen through a displacement method; heating to a temperature 20-50 DEG C higher than a melting point of an obtained polymer; adjusting a pressure to be at 1.8-2.5 MPa constantly; keeping the constant temperature for 20-120 min and operating a stirring device; reacting for 4-24 h, releasing pressure, vacuumizing and keeping at 10-4 MPa for 20-50 min; finally filling nitrogen to guarantee a pressure in the reaction kettle to reach 1.5-2.5 MPa, extruding the material, cooling and drying to obtain the multi-arm star polyamide polymer. Compared with a prior art, the invention has advantage of simpleness and easiness for enforcement; and the obtained multi-arm star polyamide polymer has controllable nucleus structure and property and controllable arm number, arm length and arm property, flexible and adjustable structure and can be modified conveniently for application in many fields.

Description

technical field [0001] The method belongs to the technical field of polymer material science, and in particular relates to a preparation method of a multi-arm star-shaped polyamide polymer. Background technique [0002] Multi-Arm Star Polymer (Multi-Arm Star Polymer) is one of the research hotspots in the field of polymer materials in recent years. Multi-armed star polymers are macromolecules composed of linear polymer arms radiating from a center. It has the characteristics of highly branched structure, difficult entanglement of molecular chains, significantly lower viscosity of solution and bulk than linear polymers of the same molecular weight, and a large number of functional groups at the end of molecular chains for further modification. These characteristics endow the multi-armed star polymer with unique value in basic research and industrial applications, such as: its solution and bulk viscosity are lower than those of linear polymers with the same molecular weight, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G69/00C08G69/16C08G69/08C08G69/28
Inventor 吴波震
Owner SHANGHAI GENIUS ADVANCED MATERIAL (GRP) CO LTD
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