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Maleic anhydride-grafted polypropylene material and preparation method thereof

A technology for grafting polypropylene and maleic anhydride, which is applied in the field of maleic anhydride grafted polypropylene materials and their preparation, can solve problems such as ungiven and unexplained mechanisms, and achieves easy operation, improved surface finishing performance, and ease of use. The effect of industrial production

Inactive Publication Date: 2009-02-04
INST OF CHEM CHINESE ACAD OF SCI +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In CN1456430A, the applicant claimed that using oleic acid as a co-grafting monomer can increase the grafting rate, but did not explain the mechanism and did not provide supporting information

Method used

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  • Maleic anhydride-grafted polypropylene material and preparation method thereof
  • Maleic anhydride-grafted polypropylene material and preparation method thereof
  • Maleic anhydride-grafted polypropylene material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Embodiment 1, preparation maleic anhydride grafted polypropylene material

[0024] Raw material components (in parts by mass, the same below): 100 parts of homopolypropylene, produced by Daqing Petrochemical Company, the trade mark is T30S, which is used in the following examples; 0.05 part of dicumyl peroxide ; 1.5 parts of maleic anhydride; 1.5 parts of pentaerythritol triacrylate.

[0025] The twin-screw extruder used is a co-rotating building block twin-screw extruder with a screw diameter of 30 mm, a length-to-diameter ratio of 40, variable frequency speed regulation, and seven-stage heating for temperature control. All select this twin-screw extruder in following each embodiment.

[0026] The above-mentioned components are uniformly mixed with a high-speed mixer, and then melt-extruded and pelletized in a twin-screw extruder to obtain the maleic anhydride grafted polypropylene material provided by the present invention. Among them, the speed of the extruder is 1...

Embodiment 2

[0028] Embodiment 2, preparation maleic anhydride grafted polypropylene material

[0029] Raw material components: 100 parts of homopolypropylene; 0.075 parts of 2,5-dimethyl-2,5-bis(tert-butylperoxy)hexane; 1.5 parts of maleic anhydride; 0.75 parts of pentaerythritol triacrylate.

[0030] The above components are uniformly mixed with a high-speed mixer, and then melt-extruded and granulated in a twin-screw extruder to obtain the maleic anhydride grafted polypropylene material provided by the present invention. Among them, the speed of the extruder is 150 rpm, and the temperature of each section of the twin-screw from the feed port to the head is: 170°C, 180°C, 190°C, 195°C, 195°C, 190°C, 185°C.

[0031] The product was placed in a Soxhlet extractor and extracted with acetone for 12 hours, and the extracted product was pressed into a thin film for infrared analysis.

Embodiment 3

[0032] Embodiment 3, preparation maleic anhydride grafted polypropylene material

[0033] Using the same preparation conditions as in Example 2, only the raw materials and their corresponding parts by mass were changed as follows: 100 parts of homopolypropylene; 0.10 parts of dicumyl peroxide; 2.0 parts of maleic anhydride; pentaerythritol 2.25 parts of triacrylate.

[0034] The obtained product was placed in a Soxhlet extractor and extracted with acetone for 12 hours, and the extracted product was pressed into a thin film for infrared analysis.

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Abstract

The invention discloses a maleic anhydride grafted polypropylene material and a preparation method thereof. The material is prepared with polypropylene, an initiator, maleic anhydride and a polyfunctional group monomer. In the preparation method, after the polypropylene, the initiator, the maleic anhydride and the polyfunctional group monomer are mixed uniformly, the mixture is molten and compounded, thus getting the product. The temperature for melting and compounding ranges from 150 DEG C to 250 DEG C. The mixture is molten and compounded in a double screw extruder, and the screw of the double screw extruder runs at the speed of 50 to 500 turns per minute. The ratio of length to diameter of the screw ranges from 15 to 100. In the maleic anhydride grafted polypropylene. The content of grafted maleic anhydride is more than 1.0 percent; the excellent mechanical property of the polypropylene base is kept while the polarity of the polypropylene is improved. The maleic anhydride grafted polypropylene can be used as a compatilizer for a polymer blending system to improve the surface coating performance of products.The preparation method is operated easily and simply, and is applicable for industrial production.

Description

technical field [0001] The invention relates to a maleic anhydride grafted polypropylene material and a preparation method thereof. Background technique [0002] Polypropylene (PP) is one of the five general-purpose plastics. It has excellent mechanical properties and is widely used in many fields such as automobiles, household appliances, and packaging. However, due to the non-polarity and crystallinity of polypropylene, it has poor compatibility with most polymers, is not easy to wet, has poor adhesion, printing and coating performance, and cannot get good performance when blended with polar materials. s material. Therefore, it is necessary to modify polypropylene to increase its polarity and broaden its application range. A commonly used modifying monomer is maleic anhydride. [0003] At present, the main methods of grafting maleic anhydride onto the polymer backbone include solution grafting, melt grafting, solid phase grafting and suspension grafting. [0004] Solut...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F255/02C08F222/10C08F222/06
Inventor 董金勇倪青林范家起
Owner INST OF CHEM CHINESE ACAD OF SCI