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A kind of preparation method of ultraviolet light irradiation initiating molten polypropylene graft maleic anhydride

A polypropylene grafting and maleic anhydride technology, which is applied in the field of polymer materials, can solve the problems of lowering the grafting temperature and the grafting rate is not very high, and achieves the effects of avoiding severe degradation, simple equipment and short reaction time.

Inactive Publication Date: 2019-05-14
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method greatly reduces the grafting temperature, but this method is only suitable for powdered polypropylene, and can only graft MAH on the surface of PP powder, so the grafting rate is not very high

Method used

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  • A kind of preparation method of ultraviolet light irradiation initiating molten polypropylene graft maleic anhydride
  • A kind of preparation method of ultraviolet light irradiation initiating molten polypropylene graft maleic anhydride
  • A kind of preparation method of ultraviolet light irradiation initiating molten polypropylene graft maleic anhydride

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] A preparation method for grafting maleic anhydride on molten polypropylene induced by ultraviolet light irradiation, comprising the following steps:

[0041] a. Count in parts by weight, weigh 100 parts of polypropylene H1030, 2 parts of photosensitizer benzophenone, and mix them with 1, 3, 5, and 7 parts of maleic anhydride respectively;

[0042] b. Set the temperature of the extruder; the schematic diagram of the extruder is as figure 1 Shown; The barrel of the extruder is provided with a light opening;

[0043] c. Place a UV lamp with a power of 1kW at 10cm above the light opening of the extruder, and turn on the UV lamp;

[0044] d. Add the mixture obtained in step a to the extruder hopper;

[0045] e. After the extruder reaches the set temperature, turn on the extruder for melt blending and extrusion to obtain maleic anhydride grafted polypropylene; the extruder is a twin-screw extruder with a length of twin-screw extruder The diameter ratio is 40:1, the main engine speed (...

Embodiment 2

[0049] A preparation method for grafting maleic anhydride on molten polypropylene induced by ultraviolet light irradiation, comprising the following steps:

[0050] a. Count in parts by weight, weigh out 100 parts of polypropylene H1030, 5 parts of maleic anhydride, 2 parts of photosensitizer 1-hydroxy-cyclohexyl phenyl ketone 184, and mix well;

[0051] b. Set the temperature of the extruder; the schematic diagram of the extruder is as figure 1 Shown; The barrel of the extruder is provided with a light opening;

[0052] c. Place a UV lamp with a power of 1kW at 10cm above the light opening of the extruder, and turn on the UV lamp;

[0053] d. Add the mixture obtained in step a to the extruder hopper;

[0054] e. After the extruder reaches the set temperature, turn on the extruder for melt blending and extrusion to obtain maleic anhydride grafted polypropylene; the extruder is a twin-screw extruder with a length of twin-screw extruder The diameter ratio is 40:1, the main engine speed i...

Embodiment 3

[0057] A preparation method for grafting maleic anhydride on molten polypropylene induced by ultraviolet light irradiation, comprising the following steps:

[0058] a. Count in parts by weight, weigh 100 parts of polypropylene H1030, 5 parts of maleic anhydride, 2 parts of photosensitizer benzophenone, 1 part of monofunctional monomer grafting aid styrene, and mix well;

[0059] b. Set the temperature of the extruder; the schematic diagram of the extruder is as figure 1 Shown; The barrel of the extruder is provided with a light opening;

[0060] c. Place a UV lamp with a power of 1kW at 10cm above the light opening of the extruder, and turn on the UV lamp;

[0061] d. Add the mixture obtained in step a to the extruder hopper;

[0062] e. After the extruder reaches the set temperature, turn on the extruder for melt blending and extrusion to obtain maleic anhydride grafted polypropylene; the extruder is a twin-screw extruder with a length of twin-screw extruder The diameter ratio is 40:1...

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Abstract

The invention belongs to the field of polymer materials, and discloses a preparation method of PP-g-MAH (Polypropylene grafting Maleic Anhydride) triggered and melt by ultraviolet irradiation. The preparation method comprises the following steps of (1) uniformly mixing polypropylene resin, MAH, a photosensitizer and a grafting additive; (2) setting the temperature of an extruding machine, and turning on an ultraviolet lamp, wherein a light passing opening is formed in a feed cylinder of the extruding machine, and the ultraviolet lamp is arranged above the light passing opening; (3) adding a mixture obtained in step (1) into the feed cylinder of the extruding machine; (4) turning on the extruding machine to carry out melt blending after the extruding machine reaches a set temperature, and obtaining the PP-g-MAH. According to the preparation method disclosed by the invention, the reaction time is short, and the equipment is simple; the reaction degree can be controlled by controlling the factors of the rotating speed of a main machine, the feeding speed, the temperature and the like; severe degradation of peroxide initiators on polypropylene can be avoided by using ultraviolet trigger.

Description

Technical field [0001] The invention belongs to the field of polymer materials, and specifically relates to a preparation method of grafting maleic anhydride onto molten polypropylene by ultraviolet light irradiation. Background technique [0002] Polypropylene (PP) is one of the five general plastics, with good mechanical properties, chemical stability and price advantages. However, due to the non-polarity and crystallinity of PP, its hydrophilicity and compatibility are poor, and it is not easy to wet, bond, print and coat. Therefore, it is necessary to modify polypropylene to increase its polarity and expand its application range. Grafting polar monomer is an effective method to improve the polarity of polypropylene. At present, the commonly used modified monomer in the industry is maleic anhydride. [0003] The methods for grafting maleic anhydride onto the polypropylene backbone include solution grafting, melt grafting, solid phase grafting, suspension grafting, and radiatio...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F255/02C08F222/06C08F2/50B29C48/08B29C48/92
CPCB29C48/267B29C48/92B29C2948/9258B29C2948/9259B29C2948/92704C08F2/50C08F255/02C08F222/06
Inventor 何光建曹贤武柯丁梦
Owner SOUTH CHINA UNIV OF TECH
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