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Ferroelectric polymer and preparation method thereof

A ferroelectric polymer and polymer technology, applied in the field of polymer functional materials, can solve the problems of difficult orientation of polar grains and low electrical activity, and achieve the improvement of remanent polarization strength, lower glass transition temperature, and easy reversal Effect

Active Publication Date: 2019-09-10
河南诺霖新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the electrical activity of odd-odd polyamide 1111 is still low, because the glass transition temperature of polyamide 1111 (Tg≈56°C) is much higher than that of polyvinylidene fluoride (Tg≈-30°C), It leads to difficulty in polar grain orientation of polyamide during polarization and low electrical activity

Method used

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  • Ferroelectric polymer and preparation method thereof
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  • Ferroelectric polymer and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment example 1

[0031] Step 1, mix 194.47 grams of undecanediamine and 255.52 grams of undecanedibasic acid and add it to the reactor and seal it. After the reactor is evacuated, it is filled with CO 2 gas, repeated 3 times with CO 2 Gas to replace the air in the kettle; then turn on the reactor to stir and heat, raise the temperature to 210°C and keep it warm for 0.5-1 hour; slowly deflate to normal pressure, and evacuate until the vacuum degree of the reactor is below 10KPa, continue the reaction for 0.5- 1 hour; stop stirring, fill CO into the reaction kettle 2 When the pressure inside the reactor is 0.2MPa, open the discharge port of the reactor to let the material flow out. After the material is cooled and dried, about 450 grams of carboxy-terminated polyamide 1111 prepolymer with a molecular weight of 3000 can be obtained.

[0032] Step 2, 250 grams of molecular weight is 3000 carboxyl-terminated polyamide 1111 prepolymer, 34.16 grams of amino polyether ED410 (the molar ratio of carbox...

Embodiment example 2

[0037] Step 1, mix 197.92 grams of undecanediamine and 252.07 grams of undecanedibasic acid and add it to the reactor and seal it. The reactor is evacuated and filled with CO 2 Gas, repeat 3 times to replace the air in the kettle; then turn on the reactor to stir and heat, raise the temperature to 210°C and keep it warm for 0.5-1 hour; slowly deflate to normal pressure, and vacuum until the vacuum of the reactor is below 10KPa , continue to react for 0.5-1 hour; stop stirring, fill the reactor with CO 2 When the pressure inside the reactor is 0.2 MPa, open the discharge port of the reactor to let the material flow out. The material is cooled and dried to obtain about 450 grams of carboxy-terminated polyamide 1111 prepolymer with a molecular weight of 4000.

[0038] Step 2, 250 grams of molecular weight is 4000 carboxyl-terminated polyamide 1111 prepolymer, 25.63 grams of amino polyether ED410 (the mol ratio of carboxyl-terminated polyamide 1111 prepolymer and amino polyether E...

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Abstract

The invention discloses a ferroelectric polymer and a preparation method thereof. The ferroelectric polymer is synthesized by a carboxyl-terminated polyamide 1111 prepolymer and amino polyether ED410under the action of a catalyst through a polycondensation method. The preparation method specifically comprises the following steps: (1) preparing a polyamide 1111 prepolymer; (2) adding the polyamide1111 prepolymer, amino polyether ED410 and a catalyst into a high-pressure reaction kettle, carrying out sealing, and filling the kettle with inert gas for protection; (3) carrying out stirring, andheating the reaction kettle to 240 DEG C for a reaction; (4) carrying out vacuumizing until the vacuum degree in the kettle is 10 kPa or below, and continuing a reaction; and (5) after the reaction iscompleted, carrying out discharging, cooling and granulating to obtain the ferroelectric polymer. The method is simple to operate and is low in cost, and the glass transition temperature of the polyamide 1111 is reduced through molecular structure design, so that electrical activity of the polyamide 1111 is improved, and the method is expected to be widely applied to the transducers, energy accumulators, sensors and drivers.

Description

technical field [0001] The invention belongs to the field of polymer functional materials, and relates to a ferroelectric polymer and a preparation method thereof, in particular to a polyamide 1111 ferroelectric polymer and a preparation method thereof. Background technique [0002] Ferroelectric materials refer to materials that have spontaneous polarization and whose polarization direction can be reversed with the reversal of the applied electric field. Ferroelectric materials have hysteresis loops. Ferroelectric polymer materials are widely used in transducers, energy storage, sensors and actuators. [0003] At present, ferroelectric polymers mainly include polyvinylidene fluoride (PVDF) and its copolymers. Polyvinylidene fluoride and its copolymers have high electrical activity and are currently the only ferroelectric polymers that can be used commercially. However, polyvinylidene fluoride is expensive and trifluoroethylene is highly toxic. [0004] Theoretically, pol...

Claims

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Application Information

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IPC IPC(8): C08G69/40
CPCC08G69/40
Inventor 刘少兵程绍娟何茜禅胡骥徐亚娟周思凯朱新军
Owner 河南诺霖新材料科技有限公司