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Continuous glass fiber reinforced polypropylene with high impact strength and preparation method thereof

A technology of continuous glass fiber and polypropylene, which is applied in the field of continuous glass fiber reinforced polypropylene and its preparation, and can solve the problems of sacrificing the mechanical properties of polypropylene and low notched impact strength

Inactive Publication Date: 2013-08-21
DALIAN JUXING TECH CO LTD +1
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, polypropylene also has its disadvantages. The main reason is that the notched impact strength of polypropylene material is low. Therefore, toughening polypropylene is one of the key points of polypropylene modification. Generally, elastomer blending is used to toughen polypropylene, but this method is greatly improved. Other mechanical properties of polypropylene are sacrificed

Method used

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Embodiment Construction

[0030] The present invention will be further explained below in conjunction with embodiment.

[0031] 1, get the raw material polypropylene, β nucleating agent, antioxidant and compatibilizer of embodiment and comparative ratio weight ratio;

[0032] 2. Then the polypropylene and the β-nucleating agent were mixed evenly according to the ratio of 19:1 and extruded and granulated to prepare the β-nucleating agent masterbatch, and the content of the β-nucleating agent was 5%;

[0033] 3. Put the prepared β-nucleating agent masterbatch, antioxidant, compatibilizer and the remaining polypropylene into the high-speed mixer for 2-6 minutes after weighing according to the proportion, and then add the mixture to the Twin-screw extruder, the impregnation die is connected to the head of the extruder, the continuous glass fiber enters through the glass fiber inlet of the impregnation die, and merges with the polypropylene mixture melted and extruded by the extruder in the impregnation tan...

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Abstract

The invention discloses continuous glass fiber reinforced polypropylene with high impact strength and a preparation method thereof. The continuous glass fiber reinforced polypropylene is prepared from the following raw materials in parts by weight: 56-77 parts of polypropylene, 20-40 parts of glass fiber, 0.1-0.6 part of beta nucleating agent, 0.2-0.8 part of antioxidant and 2-6 parts of compatibilizer. According to the continuous glass fiber reinforced polypropylene disclosed by the invention, the high-content beta crystal form polypropylene can be obtained by adding the beta nucleating agent in polypropylene, so that the impact strength of the polypropylene material is improved; and the problem that other mechanical properties of the polypropylene are sacrificed when an elastomer is adopted for blending so as to toughen the polypropylene is avoided. The commercialized trade name high-melting index polypropylene synthesized by adopting a polymerization way can avoid the problem of the method which adopts peroxides for degrading the polypropylene so as to obtain high melting index that the residual peroxides easily causes the aging of the polypropylene.

Description

technical field [0001] The invention relates to the field of polymer materials, in particular to a continuous glass fiber reinforced polypropylene and a preparation method thereof. Background technique [0002] Polypropylene has the advantages of low density, excellent mechanical properties, stress crack resistance and chemical resistance, and is easy to process, cheap and widely used in various fields. However, polypropylene also has its disadvantages. The main reason is that the notched impact strength of polypropylene material is low. Therefore, toughening polypropylene is one of the key points of polypropylene modification. Generally, elastomer blending is used to toughen polypropylene, but this method is greatly improved. Other mechanical properties of polypropylene are sacrificed. Polypropylene is a crystalline polymer with five different crystal forms such as α and β. The α crystal form belongs to the monoclinic crystal system. It is the most stable spherulite. Comme...

Claims

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Application Information

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IPC IPC(8): C08L23/12C08L51/06C08K13/06C08K9/00C08K7/14C08K5/01C08K5/09C08K5/20C08J5/08
Inventor 卢军祖勇曹明
Owner DALIAN JUXING TECH CO LTD
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