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High-strength high-rigidity graphene modified polypropylene and preparation method therefor

A graphene-modified, high-strength technology, applied in the field of modified polypropylene, high-strength and high-rigidity graphene-modified polypropylene, can solve the problems of low dimensional stability, shortened service life, reduced strength, etc., and achieve bending strength High, improved strength and rigidity, good rigidity effect

Active Publication Date: 2017-12-01
NINGBO HAIYU ADVANCED MATERIALS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the low dimensional stability and poor rigidity of polypropylene itself, the added graphene content is small, and it will receive resistance during use, resulting in warping and deformation, and insufficient rigidity, which has great limitations in the practical application field.
Moreover, due to the degree of orientation and internal stress of the polypropylene material during the injection molding process of the part, the part is subjected to torque and damping during assembly and use, which reduces its strength and shortens its service life

Method used

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  • High-strength high-rigidity graphene modified polypropylene and preparation method therefor
  • High-strength high-rigidity graphene modified polypropylene and preparation method therefor
  • High-strength high-rigidity graphene modified polypropylene and preparation method therefor

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Experimental program
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Effect test

Embodiment 1

[0037] Take the component of high-strength and high-rigidity graphene-modified polypropylene material by the parts by weight described in embodiment 1 in table 1, wherein the molecular weight of homopolypropylene is 5000, and graphene is double-layer graphene, alkali-free The glass fiber has a length of 2.0 mm and a diameter of 12 μm;

[0038] Add other components except the alkali-free glass fiber into the mixer and mix for 4 minutes, and the speed of the mixer is 500rpm / min;

[0039] Pour the uniformly mixed material into a twin-screw extruder for extrusion and granulation. The main engine speed of the twin-screw extruder is 25HZ, the main feed is 15HZ, the side feed is 10HZ, the temperature is set at 235°C, and extrusion is granulated. At the same time, the alkali-free glass fiber is added from the side feeding port of the twin-screw machine by the weightless feeding method to obtain high-strength and high-rigidity graphene-modified polypropylene pellets.

Embodiment 2

[0041] Take the component of high-strength and high-rigidity graphene-modified polypropylene material by weight parts described in embodiment 2 in table 1, wherein the molecular weight of homopolypropylene is 5200, graphene is double-layer graphene, alkali-free The glass fiber has a length of 2.1 mm and a diameter of 12 μm;

[0042] Add other components except the alkali-free glass fiber into the mixer and mix for 4 minutes, and the speed of the mixer is 300rpm / min;

[0043] Pour the uniformly mixed material into a twin-screw extruder for extrusion and granulation. The main engine speed of the twin-screw extruder is 30HZ, the main feed is 17HZ, the side feed is 10HZ, the temperature is set at 240°C, and extrusion is granulated. At the same time, the alkali-free glass fiber is added from the side feeding port of the twin-screw machine by the weightless feeding method to obtain high-strength and high-rigidity graphene-modified polypropylene pellets.

Embodiment 3

[0045] Take the component of high-strength and high-rigidity graphene-modified polypropylene material by weight parts described in embodiment 3 in table 1, wherein the molecular weight of homopolypropylene is 4700, and graphene is double-layer graphene, alkali-free The glass fiber has a length of 1.8 mm and a diameter of 13 μm;

[0046] Add other components except alkali-free glass fiber into the mixer and mix for 3 minutes, and the speed of the mixer is 400rpm / min;

[0047] Pour the uniformly mixed material into a twin-screw extruder for extrusion and granulation. The main engine speed of the twin-screw extruder is 35HZ, the main feed is 18HZ, the side feed is 11HZ, the temperature is set at 235°C, and extrusion is granulated. At the same time, the alkali-free glass fiber is added from the side feeding port of the twin-screw machine by the weightless feeding method to obtain high-strength and high-rigidity graphene-modified polypropylene pellets.

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Abstract

The invention relates to modified polypropylene, particularly relates to high-strength high-rigidity graphene modified polypropylene and belongs to the technical field of macromolecular materials. The modified polypropylene material is prepared from the following ingredients in parts by weight: 38-51 parts of homopolymerized polypropylene, 15-20 parts of graphene, 28-32 parts of alkali-free glass fibers, 2-4 parts of enzymolysis lignin, 5-8 parts of compatibilizer, 0.5-2 parts of antioxidant, 0.5-1.0 part of lubricant and 0.1-0.2 part of couplant. The high-strength high-rigidity graphene modified polypropylene is prepared through adding the high strength glass fiber inorganic matter into the homopolymerized polypropylene, which serves as a carrier, then, introducing a conductive medium, i.e., double-layer graphene, and then, adding the enzymolysis lignin. Compared with the ordinary polypropylene, the high-strength high-rigidity graphene modified polypropylene disclosed by the invention has the advantages of being high in tensile strength and flexural strength, being not prone to breakage, being good in rigidity, resistant to corrosion and resistant to aging and having the characteristic of electric conduction.

Description

technical field [0001] The invention relates to a modified polypropylene, in particular to a high-strength and high-rigidity graphene-modified polypropylene, which belongs to the technical field of polymer materials. technical background [0002] Polypropylene PP is one of the five general-purpose plastics. It has excellent characteristics such as low density, easy processing, chemical corrosion resistance, and good electrical insulation. It is suitable for making general mechanical parts, corrosion-resistant parts and insulating parts. Common organic acids such as acids and alkalis Solvents have little effect on it and can be used for tableware. However, polypropylene also has disadvantages such as large molding shrinkage rate, very sensitive to notch, easy to crack at low temperature and poor impact resistance, which limits its application range. [0003] In order to expand the application range of materials, especially polypropylene materials with higher tensile properti...

Claims

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Application Information

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IPC IPC(8): C08L23/12C08L97/00C08K13/04C08K7/14C08K3/04C08K3/34C08K3/36B29B9/06
Inventor 王宁鲍海程高伟刘池茂孙菁联徐红红
Owner NINGBO HAIYU ADVANCED MATERIALS TECH
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