CN110615953B

CN110615953B - Novel antistatic ABS composite material and preparation method thereof

Info

Publication number: CN110615953B
Application number: CN201911036132.9A
Authority: CN
Inventors: 孙树林; 赵雪悠; 陆书来; 孙春福; 宋振彪
Original assignee: Changchun University of Technology
Current assignee: Changchun University of Technology
Priority date: 2019-10-29
Filing date: 2019-10-29
Publication date: 2022-02-22
Anticipated expiration: 2039-10-29
Also published as: CN110615953A

Abstract

The invention belongs to the field of high polymer materials, and discloses an antistatic ABS composite material and a preparation method thereof. The antistatic ABS composite material comprises the following components in parts by weight: 22-25 parts of ABS powder, 65-75 parts of SAN resin, 5-10 parts of compatilizer, 2-5 parts of antistatic agent and 0.1-0.3 part of antioxidant. According to the invention, ABS is used as matrix resin, carbon nano tubes are used as an antistatic agent, and ionic liquid is introduced as a compatilizer of the ABS resin and the carbon nano tubes, so that the carbon nano tubes can be well dispersed in the ABS resin and form a conductive path, the ABS composite material has excellent antistatic property, impact resistance and fluidity, and the resistivity of the ABS composite material is 10¹⁶Down to 10⁵Omega. The composite material can be widely applied to the fields of instrument equipment, medical equipment and the like with higher requirements on the antistatic performance of the material.

Description

Novel antistatic ABS composite material and preparation method thereof

Technical Field

The invention relates to the field of high polymer materials, in particular to an antistatic ABS composite material and a preparation method thereof.

Background

The ABS resin is a thermoplastic high polymer material with excellent performance, and has excellent performances such as high impact resistance, high rigidity, chemical resistance, low temperature resistance and the like. The ABS has stable processing dimension and good surface gloss, is easy to coat, color, spray metal, electroplate and other secondary processing, and can be widely applied to various fields of mechanical industry, automobile industry, electronic and electrical industry, instrument industry and the like. The development trend of ABS is toward high-performance and multifunctional special resin, so as to improve the added value and market competitiveness of the product. The volume resistivity of general-purpose ABS resins is generally 5X 10¹⁶Omega, the static charges in the ABS are easy to accumulate to generate micro current, thereby influencing the normal use of products and limiting the application of ABS. In the prior art, antistatic ABS is prepared by introducing some antistatic agents or spraying metal materials on the surface of ABS resin to achieve the antistatic effect.

Chinese patent CN107915946A discloses an antistatic high-toughness ABS composite material. Nanometer titanium nitride treated by a silane coupling agent is added into ABS, glycidyl methacrylate is grafted to EPDM to form EPDM-g-GMA, the problem of compatibility of EPDM and ABS is solved, but the mechanical property of the EPDM and the ABS is not further researched.

Chinese patent CN107955567A discloses an antistatic ABS compound and a preparation method and application thereof. The ABS is added with antistatic agent metal salt and polyoxyethylene, and simultaneously, the bonding modifier ethylene-methyl acrylate-glycidyl methacrylate and the bonding synergist turpentine are introduced to ensure that the composite material has high bonding degree. But its surface resistivity is optimally only 10⁸Ω, still further optimization is needed.

In practical application, the antistatic agent and the ABS resin have the defects of poor compatibility, easy agglomeration, easy generation of stress concentration areas and the like, so that a conductive path is difficult to form inside the resin, and the mechanical property of the resin is greatly reduced. Therefore, the invention provides a novel antistatic ABS composite material and a preparation method thereof, and the cation-pi interaction is formed between an imidazole ring structure in ionic liquid and a carbon nano tube, so that the carbon nano tube can be well dispersed in ABS, the antistatic effect is achieved, and the introduction of the ionic liquid can maintain the mechanical property of the material.

Disclosure of Invention

The invention mainly solves the technical problem of providing a novel antistatic ABS resin, which can ensure that ABS has good antistatic property and mechanical property, and solves the problems in the technical background.

An antistatic ABS composite material and a preparation method thereof are characterized in that: the preparation method of the antistatic ABS composite material comprises the following raw materials or components in parts by weight: 22-25 parts of ABS powder, 65-75 parts of SAN resin, 5-10 parts of compatilizer, 2-5 parts of antistatic agent and 0.1-0.3 part of antioxidant; the raw materials are put into an oven for dehumidification and drying, weighed according to the weight part ratio, added into a stirrer for even stirring, extruded in an extruder, cooled and hardened by a circulating water tank, and cut and granulated by a granulator to obtain a small particle finished product.

The ABS powder is a copolymer of polybutadiene latex grafted styrene and acrylonitrile, and is used after graft coagulation, washing and drying.

The SAN resin contains 75% of styrene and 25% of acrylonitrile.

The compatilizer is at least one of chlorinated 1-hexadecyl-3-methylimidazole, brominated 1-hexadecyl-3-methylimidazole and 1-butyl-3-methylimidazole dihydrogen phosphate, but is not limited to the above.

The antistatic agent is carbon nanotube with outer diameter of 20-30nm, inner diameter of 5-10nm, length of 10-30 μm, and specific surface area greater than 110m²/g。

The antioxidant is antioxidant 618.

The extruder is a double-screw extruder, the temperature control range of each temperature zone is 200-220 ℃, and the screw rotating speed is 150-450 rpm.

The invention has the beneficial effects

The carbon nano tube is a nano tubular structure material and has good electrical conductivity and mechanical strength. The ABS antistatic composite material introduces carbon nanotube carbon filler as an antistatic agent into ABS resin, and introduces ionic liquid as a compatilizer between the ABS resin and the carbon nanotubes so as to ensure that the ABS resin has good dispersibility in the resin. The carbon nano tube forms pi-cation interaction with the ionic liquid due to the structural characteristics of the carbon nano tube, so that the microstructure of the material is changed into a continuous phase structure from a sea-island structure. The carbon nano tube forms a conductive network in the ABS composite material to lead out static charge by utilizing the synergistic effect between the antistatic agent and the compatilizer so as to achieve the antistatic effect. The ABS composite material provided by the invention has the advantages of excellent performance, simple process, realization of industrial production and good application prospect.

Drawings

FIG. 1 is a graph of performance test data for the ABS composite bars of the example and the comparative example.

Detailed Description

Various examples and comparative examples of the present invention will be described in detail below. In the following examples, unless otherwise specified, the reagents are conventional and the assay methods are conventional.

In the antistatic ABS composite material disclosed by the invention, the addition of the antistatic agent reduces the conductivity of the composite material, so that the material has excellent antistatic property; and a proper amount of compatilizer is added, so that the antistatic agent is uniformly dispersed in the resin, a stress concentration area formed by agglomeration of the antistatic agent in the ABS is reduced, and the mechanical property of the ABS composite material is improved.

The present invention is further illustrated by the following specific examples and comparative examples.

Wherein the ABS powder is a copolymer of polybutadiene latex grafted styrene and acrylonitrile, and is used after graft coagulation, washing and drying.

The SAN resin used had a styrene content of 75% and an acrylonitrile content of 25%.

The used compatilizer is at least one of 1-hexadecyl-3-methylimidazole chloride (compatilizer 1), 1-hexadecyl-3-methylimidazole bromide (compatilizer 2) and 1-butyl-3-methylimidazole dihydrogen phosphate (compatilizer 3), but is not limited to the above.

The antioxidant used was antioxidant 618.

The present invention will be described in detail with reference to examples and comparative examples. In the examples presented herein, any particular numerical value should be construed as exemplary only and not as limiting.

Example 1

According to the parts by weight, 23 parts of ABS powder, 70 parts of SAN resin, 5 parts of

compatilizer

1, 2 parts of antistatic agent and 0.1 part of antioxidant are respectively weighed.

The manufacturing method of the above embodiment: the raw materials are weighed according to the weight portion ratio, put into a drying oven for dehumidification and drying, then added into a stirring machine for uniform stirring, and extruded in a double-screw extruder, wherein the range of each temperature zone of the extruder is 200-450 ℃, and the rotating speed of a screw is 150-450 rpm. And cooling and hardening the extruded material strips through a circulating water tank, and cutting and granulating through a granulator to obtain small particle finished products. And (3) carrying out injection molding on the ABS composite material through an injection molding machine to obtain a sample strip for performance testing.

Example 2

Weighing 23 parts of ABS powder, 70 parts of SAN resin, 5 parts of

compatilizer

2, 2 parts of antistatic agent and 0.2 part of antioxidant according to parts by weight.

Example 3

Weighing 23 parts of ABS powder, 70 parts of SAN resin, 5 parts of

compatilizer

3, 2 parts of antistatic agent and 0.3 part of antioxidant according to parts by weight.

Example 4

Weighing 22 parts of ABS powder, 69 parts of SAN resin, 6 parts of

compatilizer

1, 3 parts of antistatic agent and 0.2 part of antioxidant according to parts by weight.

Example 5

Respectively weighing 20 parts of ABS powder, 65 parts of SAN resin, 10 parts of

compatilizer

1, 5 parts of antistatic agent and 0.1 part of antioxidant according to parts by weight.

Comparative example 1

Respectively weighing 25 parts of ABS powder, 75 parts of SAN resin and 0.2 part of antioxidant according to parts by weight.

Comparative example 2

Respectively weighing 24 parts of ABS powder, 71 parts of SAN resin, 5 parts of compatilizer and 0.3 part of antioxidant according to parts by weight.

Comparative example 3

Respectively weighing 25 parts of ABS powder, 72 parts of SAN resin, 3 parts of antistatic agent and 0.1 part of antioxidant according to parts by weight.

The ABS composite material bars in the above examples and comparative examples are subjected to performance tests, and the test data are shown in the attached drawings.

As can be seen from the Table of examples S1-S5 and comparative examples C1-C3, the composites of examples S1-S3, to which compatibilizer 1 was added under the same conditions, had better overall properties than the composites to which compatibilizers 2 and 3 were added; comparative example C2 ABS composite without added antistatic agent did not have antistatic capability; comparative example C3 shows a 50% reduction in impact performance of the ABS composite without the addition of a compatibilizer; the ABS composites of examples S1-S5 had a surface resistivity reduced by at least 9 orders of magnitude compared to comparative examples C1-C3, and the composites had excellent antistatic properties, impact properties and flow properties that were well maintained and optimized compared to comparative example C1 without any additives.

The novel antistatic composite material has excellent comprehensive performance, and the mechanical property of the novel antistatic composite material is basically kept unchanged while the excellent antistatic performance is ensured.

Claims

1. The preparation method of the antistatic ABS composite material is characterized by comprising the following steps of: the preparation method of the antistatic ABS composite material comprises the following raw materials or components in parts by weight: 22-25 parts of ABS powder, 65-75 parts of SAN resin, 5-10 parts of compatilizer, 2-5 parts of antistatic agent and 0.1-0.3 part of antioxidant; putting the raw materials into an oven for dehumidification and drying, weighing the raw materials in parts by weight, adding the raw materials into a stirrer, uniformly stirring, extruding in an extruder, cooling and hardening strips by a circulating water tank, and cutting and granulating by a granulator to obtain small particle finished products;

the compatilizer is one of chlorinated 1-hexadecyl-3-methylimidazole, brominated 1-hexadecyl-3-methylimidazole and 1-butyl-3-methylimidazole dihydrogen phosphate;

2. The preparation method of the antistatic ABS composite material as claimed in claim 1, wherein the preparation method comprises the following steps: the ABS powder is a copolymer of polybutadiene latex grafted styrene and acrylonitrile, and is used after graft coagulation, washing and drying.

3. The preparation method of the antistatic ABS composite material as claimed in claim 1, wherein the preparation method comprises the following steps: the SAN resin contains 75% of styrene and 25% of acrylonitrile.

4. The preparation method of the antistatic ABS composite material as claimed in claim 1, wherein the preparation method comprises the following steps: the antioxidant is antioxidant 618.

5. The preparation method of the antistatic ABS composite material as claimed in claim 1, wherein the preparation method comprises the following steps: the extruder is a double-screw extruder, the temperature control range of each temperature zone is 200-220 ℃, and the screw rotating speed is 150-450 rpm.