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High-melt-strength polypropylene cable material and preparation method thereof

A technology of high melt strength and polypropylene, applied in the field of polymer materials, can solve the problems of complicated preparation process and limited improvement of melt strength performance, and achieve simple preparation process, good breakdown field strength and volume resistivity, and improved The effect of melt strength

Active Publication Date: 2021-08-31
HARBIN UNIV OF SCI & TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The above-mentioned patent documents have prepared high-melt-strength polypropylene by means of irradiation and graphene grafting, and improved the melt strength of polypropylene by introducing long-chain branches. However, the preparation process of the above two technical solutions is relatively complicated, and the melting The defect that the body strength performance is limited

Method used

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  • High-melt-strength polypropylene cable material and preparation method thereof
  • High-melt-strength polypropylene cable material and preparation method thereof
  • High-melt-strength polypropylene cable material and preparation method thereof

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preparation example Construction

[0039] The present invention also provides a preparation method of high melt strength polypropylene cable material, comprising the following steps:

[0040] (1) heating and stirring after polypropylene, grafting aid and polar compound are mixed;

[0041] (2) Initiator and antioxidant are added in the mixture of step (1), after mixing, add in the rheometer and melt and blend until the torque curve tends to be stable;

[0042] (3) putting the product obtained in step (2) into xylene solution for purification, suction filtration, and drying to obtain a white powdery product;

[0043] (4) Add the white powder obtained in step (3) into the rheometer, and after the white powder is melted, join the metal ion compound into the rheometer for melt blending;

[0044] (5) drying the product mixed in step (4) to obtain a high melt strength polypropylene cable material.

[0045] In the present invention, the heating temperature of the step (1) is 40-50°C, the stirring time is 1.5-2.5h, th...

Embodiment 1

[0051] A high-melt-strength polypropylene cable material is prepared from raw materials comprising the following parts by weight:

[0052]

[0053]

[0054] Further, the preparation method of the above-mentioned high melt strength polypropylene cable material comprises the following steps:

[0055] (1) After mixing polypropylene, styrene and maleic anhydride, stir at 40°C for 2.5h;

[0056] (2) Add dicumyl peroxide and tetrakis[β-(3,5-di-tert-butyl-4-hydroxyphenyl) propionate] pentaerythritol to the mixture in step (1), mix and add to temperature Melt blending in a rheometer set at 170°C until the torque curve tends to be stable;

[0057] (3) putting the product obtained in step (2) into xylene solution for purification, suction filtration, and drying in an oven at 70° C. for 50 hours to obtain a white powdery product;

[0058](4) Add the white powder obtained in step (3) into the rheometer with the temperature set to 170° C. After the white powder is melted, add zinc ...

Embodiment 2

[0061] A high-melt-strength polypropylene cable material is prepared from raw materials comprising the following parts by weight:

[0062]

[0063]

[0064] Further, the preparation method of the above-mentioned high melt strength polypropylene cable material comprises the following steps:

[0065] (1) Mix polypropylene, styrene and maleic anhydride and stir at 43°C for 2.2h;

[0066] (2) Add 2,5-dimethyl-2,5-bis(peroxy-tert-butyl)hexane and tetrakis[β-(3,5-di-tert-butyl- 4-hydroxyphenyl) propionate] pentaerythritol ester, after mixing, join the rheometer whose temperature is set to 172°C for melt blending until the torque curve tends to be stable;

[0067] (3) put the product obtained in step (2) into a xylene solution for purification, filter it with suction, put it in a drying oven at 75° C. and dry it for 50 hours to obtain a white powdery product;

[0068] (4) Add the white powder obtained in step (3) into the rheometer with the temperature set to 172° C. After th...

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Abstract

The invention relates to the technical field of high polymer materials, and in particular, relates to a high-melt-strength polypropylene cable material and a preparation method thereof. The preparation method comprises the steps: adding polypropylene, a grafting auxiliary agent and a polar compound into a reactor, heating, stirring and mixing uniformly, adding an initiator and an antioxidant into the mixture, mixing uniformly, adding the mixture into a torque rheometer for melt blending, purifying the obtained product, and carrying out melt blending on the purified product and a metal ion compound in the torque rheometer. Ionomer ions are introduced into the obtained polypropylene ionomer, and the ionomer ions play a role in physical crosslinking due to the acting force between the ions, so that the melt strength of polypropylene is improved; and the material has relatively high breakdown field strength and volume resistivity.

Description

technical field [0001] The invention relates to the technical field of polymer materials, in particular to a high-melt strength polypropylene cable material and a preparation method thereof. Background technique [0002] With the wide application of high-voltage power transmission technology, higher requirements are put forward for the current carrying capacity, operating voltage level and operating temperature of cables. Cross-linked polyethylene is widely used in the preparation of medium and high voltage wires and cables due to its excellent electrical properties, mechanical properties and heat resistance. However, after the service life of cross-linked polyethylene is reached, it is difficult to recycle and degrade, which will cause environmental problems. [0003] Polypropylene (PP) is a thermoplastic material with excellent electrical properties and high mechanical properties, and excellent heat resistance without cross-linking, and can be recycled, making it the firs...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L51/06C08K5/07C08K5/098C08F255/02C08F222/08C08F212/08
CPCC08K5/0091C08K5/098C08F255/02C08L2203/202C08L51/06C08F222/08C08F212/08
Inventor 张文龙于浩张学悟张学深戴亚杰
Owner HARBIN UNIV OF SCI & TECH
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