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Method for improving dielectric properties of polymer matrix composites

A technology of composite materials and dielectric properties, which is applied in the field of high dielectric polymer materials, can solve the problems of ceramic materials processing difficulties, failure to meet advanced electronic and electrical technology, and vulnerability, and achieve low cost, low dielectric loss, and electric resistance. The effect of high breakdown strength

Active Publication Date: 2019-04-05
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, ceramic materials have disadvantages such as difficult processing and fragility, and are increasingly unable to meet the requirements of advanced electronic and electrical technologies.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] The thermoplastic polyurethane elastomer used in the examples and comparative examples of the present invention is BASF Elastollan 1180A polyether polyurethane elastomer.

[0043] The concrete preparation steps of preparation method are as follows:

[0044] (1) Add 100g of polyurethane into the torque rheometer for melting and blending, and finally cut it into small pieces as small as soybean grains while hot to obtain blend pellets. The temperature of each section of the torque rheometer is 180°C, and the speed is 60r / min, blending for 10min.

[0045] (2) The pellet obtained in (1) is carried out micro-injection molding by a micro-injection molding machine (Micropower 5, Battenfeld Co., Austria) to obtain a size of 0.3 × 3 × 15mm 3 The micro-injection molding products; the processing temperature of the micro-injection molding is set to 180 / 175 / 175 / 170°C from the inlet to the die respectively; the injection rate is 300mm / s, and the mold temperature is 120°C.

[0046] ...

Embodiment 2

[0048] Preparation method: the specific preparation steps are as follows:

[0049] (1) Use polyurethane elastomer as the matrix and barium titanate as the filler to prepare a composite material with high dielectric constant: 99g TPU and 1g BaTiO 3 Mix manually for 5 minutes, after mixing evenly, add to the torque rheometer to melt and blend, and finally cut into small pieces as small as soybean grains while hot to obtain blend pellets. The temperature of each section of the torque rheometer is 180°C. The rotation speed is 60r / min, and the blending time is 10min.

[0050] (2) The pellet obtained in (1) is carried out micro-injection molding by a micro-injection molding machine (Micropower 5, Battenfeld Co., Austria) to obtain a size of 0.3 × 3 × 15mm 3 micro injection molded products. The processing temperature of micro-injection molding is set to 180 / 175 / 175 / 170°C from the feed port to the die; the injection rate is 300mm / s, and the mold temperature is 120°C.

[0051] Deter...

Embodiment 3

[0053] Preparation method: the specific preparation steps are as follows:

[0054] (1) Use polyurethane elastomer as the matrix and barium titanate as the filler to prepare a composite material with high dielectric constant: 98g TPU and 2g BaTiO 3 Mix manually for 5 minutes, after mixing evenly, add to the torque rheometer to melt and blend, and finally cut into small pieces as small as soybean grains while hot to obtain blend pellets. The temperature of each section of the torque rheometer is 180°C. The rotation speed is 60r / min, and the blending time is 10min.

[0055] (2) The pellet obtained in (1) is carried out micro-injection molding by a micro-injection molding machine (Micropower 5, Battenfeld Co., Austria) to obtain a size of 0.3 × 3 × 15mm 3 The micro-injection molding products; the processing temperature of the micro-injection molding is set to 180 / 175 / 175 / 170°C from the inlet to the die respectively; the injection rate is 300mm / s, and the mold temperature is 120°C...

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Abstract

The invention belongs to the field of high dielectric polymer materials, and particularly relates to a method for improving the dielectric properties of polymer matrix composites. The method for improving the dielectric properties of the polymer matrix composites includes preparing the polymer matrix composites by microinjection molding of polymer / dielectric filler blends. The method is simple andeasy to operate, and the obtained composites have high dielectric constants and low dielectric loss.

Description

technical field [0001] The invention belongs to the field of high-dielectric polymer materials, and in particular relates to a method for improving the dielectric properties of polymer-based composite materials. Background technique [0002] The concept of high dielectric materials originated in the semiconductor industry, the most representative of which is ceramic materials. However, ceramic materials have disadvantages such as difficult processing and fragility, and are increasingly unable to meet the requirements of advanced electronic and electrical technologies. With many advantages such as light weight, simple processing and low price, polymer materials have quickly become a research hotspot of high dielectric materials, and are widely used in film capacitors, medical treatment, automobile industry and other fields. [0003] Researchers have reported a large number of methods for preparing polymer materials with high dielectric properties. For example, Xin Zhang et ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L75/04C08K3/24C08L23/12C08L27/16
CPCC08K3/24C08L23/12C08L75/04C08L27/16
Inventor 杨其沈烨
Owner SICHUAN UNIV
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