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Polymer based temperature-sensitive resistance material with negative temperature coefficient (NTC) effect and preparation method thereof

A technology of negative temperature coefficient and temperature sensitive resistance, which is applied in the field of preparation of conductive polymer composite materials, can solve the problems of high conductive phase filler, high room temperature resistivity, low sensitivity, etc., and achieve low processing temperature, stable electrical performance, Effect of low percolation value

Active Publication Date: 2015-04-08
ZHENGZHOU UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

For example, the publication number is CN102796333A, which discloses a preparation method of a polyvinylidene fluoride-based temperature-sensitive resistance material with a negative temperature coefficient effect. Conductive filler prepared polyvinylidene fluoride-based temperature-sensitive resistance material; to solve the problems of high conductive phase filler, high room temperature resistivity and low sensitivity existing in existing polymer-based temperature-sensitive materials

Method used

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  • Polymer based temperature-sensitive resistance material with negative temperature coefficient (NTC) effect and preparation method thereof
  • Polymer based temperature-sensitive resistance material with negative temperature coefficient (NTC) effect and preparation method thereof
  • Polymer based temperature-sensitive resistance material with negative temperature coefficient (NTC) effect and preparation method thereof

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Embodiment 1

[0049] Example 1 Preparation of polymer-based temperature-sensitive resistor material with negative temperature coefficient effect

[0050] Raw materials: the proportioning relationship of the amount of each raw material is shown in Table 1.

[0051] Preparation method: the specific preparation steps are as follows:

[0052] (1) Drying of raw materials: Dry PA6 and MAH-g-PE pellets in a vacuum oven for 8 hours at 80°C;

[0053] (2) Preparation of MAH-g-PE powder: Mix 25g MAH-g-PE pellets with 250ml xylene in a 500ml round bottom flask, and mechanically Stir for about 1 hour; then take out the MAH-g-PE solution completely dissolved in xylene and pour it into a petri dish, and place it in a ventilated place for 100 hours until it is completely dry; finally, break the dried block with a crusher To powder form, obtain MAH-g-PE powder;

[0054] (3) Composite material preparation: According to the ratio in Table 1, first dissolve PA6 in a formic acid solution with a temperature o...

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Abstract

The invention belongs to the technical field of manufacturing of conductive polymer composites, and in particular relates to a preparation method of a conductive polymer composite with negative temperature coefficient (NTC) characteristics. The invention discloses a polymer based temperature-sensitive resistance material with a NTC effect, and the polymer based temperature-sensitive resistance material comprises the following raw materials in parts by weight: 88.5-96.9 parts of a polymer 1 and a polymer 2, 0.1-1.5 parts of a conductive filler and 3-10 parts of a compatilizer; moreover, the conductive filler is selectively distributed in the polymer 2; the MFI of the polymer 1 is less than or equal to 7g / 10 minutes, and the MFI of the polymer 2 is more than or equal to 12g / 10 minutes; the thermal expansion coefficient of the polymer 2 is greater than that of the polymer 1, and the conductive filler is a two-dimensional conductive filler; and the mass ratio of the polymer 1 to the polymer 2 is (3:7)-(7:3). The resistance material prepared by the method disclosed by the invention is low in percolation threshold, the NTC characteristic repeatability of the obtained resistance material is good, and the resistance material is convenient to use for a long time.

Description

technical field [0001] The invention belongs to the technical field of manufacturing conductive polymer composite materials, and in particular relates to a preparation method of conductive polymer composite materials with negative temperature resistance coefficient (NTC) characteristics. Background technique [0002] Conductive polymer composites (Conductive Polymer Composites, CPCs) refer to conductive fillers (such as graphite, carbon black (CB), carbon nanotubes (CNTs), graphene, etc.) molecular material. [0003] At present, the temperature-sensitive properties of CPCs materials have attracted extensive attention from academia and industry. In general, the resistivity of CPC gradually increases with the increase of temperature, and it increases rapidly near the melting point of the polymer, that is, it exhibits positive temperature coefficient (PTC) impedance characteristics. Based on the PTC characteristics of CPCs, CPCs have been widely used in the manufacture of sel...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/06C08L77/02C08L51/06C08K3/04
CPCC08K2201/001C08K2201/004C08K2201/005C08K2201/006C08L23/06C08L2203/20C08L2203/30C08L2205/03C08L2207/068C08L77/02C08L51/06C08K3/04
Inventor 代坤赵帅国李国杰郑国强刘春太申长雨
Owner ZHENGZHOU UNIV
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