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Copolymer of glycidyl methacrylate and polypropylene and preparation method thereof

A polypropylene copolymer and glycidyl ester technology, which is applied in the field of molten polypropylene grafted glycidyl methacrylate copolymer and its preparation field, can solve the problem of reduced impact resistance, increased material fluidity, deterioration of matrix performance, etc. problems, to achieve the effect of improving impact strength, low equipment requirements, and improving paintability

Inactive Publication Date: 2012-01-18
ZHONGSHAN DIANSHI PLASTIC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Polypropylene grafted glycidyl methacrylate is a compatibilizer developed to improve the interaction between polypropylene plastics and other polar fillers. At present, traditional melt-grafted polypropylene mainly uses dicumyl peroxide as Initiator, the only monomer used for monomers is glycidyl methacrylate. The main problem is that the grafting rate of polypropylene grafted with glycidyl methacrylate monomer is low, or the second monomer styrene is added to improve The grafting rate of maleic anhydride monomer is higher, but during the reaction process, under the action of the initiator, the polypropylene will partially break the chain, resulting in a significant increase in material fluidity, a decrease in impact resistance, and a deterioration in matrix performance. The compatibility of plastics with other fillers and the impact of the material are not ideal

Method used

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  • Copolymer of glycidyl methacrylate and polypropylene and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Mix glycidyl methacrylate 3%, di-tert-butyl peroxide 1.2%, p-divinylbenzene 2.5%, antioxidant 168 0.2%, antioxidant 1010 0.2%, pre-mix for 3 minutes, then add 92.9% polypropylene powder is fed into a high-speed batch mixer and stirred together for 5 minutes. Put the stirred mixture in a twin-screw machine to melt, extrude and granulate. The process conditions are: twin-screw first to third zone temperature 140°C, fourth to ninth zone temperature 160°C, head temperature 170°C, main screw speed 80 rpm , feeding screw speed 20 rev / min.

Embodiment 2

[0030] Mix glycidyl methacrylate 2.0%, di-tert-butyl peroxide 0.8%, p-divinylbenzene 1.5%, antioxidant 168 0.2%, antioxidant 1010 0.2%, pre-mix for 3 minutes, then add 95.3 % polypropylene into a high-speed batch mixer and then mixed together for 5 minutes. Put the stirred mixture in a twin-screw machine to melt, extrude and granulate. The process conditions are: twin-screw first to third zone temperature 150°C, fourth to ninth zone temperature 180°C, head temperature 195°C, main screw speed 150 rpm , The feeding screw speed is 45 rev / min.

Embodiment 3

[0032] Mix glycidyl methacrylate 5.0%, di-tert-butyl peroxide 1.8%, p-divinylbenzene 3.0%, antioxidant 168 0.2%, antioxidant 1010 0.2%, pre-mix for 3 minutes, then add 89.8% polypropylene to a high speed batch mixer and then blend together for 5 minutes. Put the stirred mixture in a twin-screw machine to melt, extrude and granulate. The process conditions are: twin-screw first to third zone temperature 145°C, fourth to ninth zone temperature 170°C, head temperature 185°C, main screw speed 100 rpm , The feeding screw speed is 35 rev / min.

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Abstract

The invention discloses copolymer of glycidyl methacrylate and polypropylene and a preparation method thereof. The preparation method comprises the following steps of: uniformly stirring the following raw materials in percentage by weight: 85 to 98 percent of polypropylene, 0.5 to 8 percent of glycidyl methacrylate, 0.5 to 13 percent of divinylbenzene, 0.1 to 3.5 percent of initiator and 0.1 to 2 percent of antioxidant, and performing melt extrusion granulation by using a stepwise heating mode. A weight ratio of the glycidyl methacrylate to the divinylbenzene in the copolymer is 1:0.6-1:16. A second cograft monomer of divinylbenzene is introduced, and the grafting rate of grafting the glycidyl methacrylate on the polypropylene is improved.

Description

technical field [0001] The invention relates to the technical field of polymer materials, in particular to a copolymer of molten polypropylene grafted with glycidyl methacrylate and a preparation method thereof. Background technique [0002] Polypropylene plastic has become one of the most promising thermoplastic polymer materials due to its excellent mechanical properties, chemical corrosion resistance, good electrical insulation, and easy processing and molding, but it has poor strength, flammability, and poor low-temperature toughness. Many shortcomings limit its further application. Modification of polypropylene plastic is the main way to expand its application field. Polypropylene plastic is a non-polar polymer. In order to improve the interaction between polypropylene and highly polar fillers, such as glass fiber, flame retardants, minerals, etc., it is necessary to add a compatibilizer to make the plastic and these fillers physically When blending, the two have a go...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F255/02C08F220/32C08F212/36B29B9/06B29C47/92B29C48/92
CPCB29C48/04
Inventor 王毅王可侯筱华
Owner ZHONGSHAN DIANSHI PLASTIC
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