High-strength polyolefin composite material and its preparation method

A composite material and polyolefin technology, applied in the field of high-strength polyolefin composite materials and its preparation, can solve problems that have not been solved well, and achieve the effect of high structure retention

Active Publication Date: 2022-04-19
NINGBO INST OF TECH ZHEJIANG UNIV ZHEJIANG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since polyolefin matrices such as polyethylene and polypropylene do not have strong polarity or "reactive" functional groups, how to disperse carbon nanomaterials well into polyolefin matrices to play a good reinforcing role has not yet been well understood. the solution

Method used

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  • High-strength polyolefin composite material and its preparation method
  • High-strength polyolefin composite material and its preparation method
  • High-strength polyolefin composite material and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] First, polypropylene (PP) weighed 48.85g, C60 weighed 0.75g, cerium trifluoromethanesulfonate (CAS No. 76089-77-5, cerium trifluoromethanesulfonate, Ce(OTf) 3 ) weighed 0.4g, put them into a blast drying oven and dried at 90°C for 24 hours; then put the dried raw materials into a torque rheometer for melt blending, and recorded the torque data. The blending temperature was 180 ℃, rotating speed 60r / min, blending time 8min, prepared PP / C60 / Ce(OTf) 3 composite material. Its reaction mechanism is as follows:

[0024] Lewis acid catalyzes the formation of macromolecular free radicals from the long chains of PP macromolecules, as shown in the following formula 1, and the macromolecular segments are grafted to the C 60 on the sphere. C 60 Known as "free radical sponge", each C 60 The spheres have numerous "reaction sites" where free radical addition can occur. The macromolecular chains are grafted to the C by radical addition reaction 60 sphere, formed with C 60 The c...

Embodiment 2

[0032] First, high-density polyethylene (HDPE) weighed 49.1g, C 60 Weigh 0.8g, yttrium trifluoromethanesulfonate (trifluoromethanesulfonate yttrium, CAS NO: 52093-30-8, Yb(OTf) 3 )) Weigh 0.3g, put them into a blast drying oven and dry at 100°C for 12h; then put the dried raw materials into a torque rheometer for melt blending, and record the torque data, blending temperature HDPE / C60 / Yb(OTf)3) composite material was prepared at 160°C, rotating speed 60r / min, and blending time 10min. Its reaction mechanism, sample preparation method and test method are with embodiment 1.

Embodiment 3

[0036] First, linear low density polyethylene (LLDPE) weighed 48.85g, C 70 Weigh 0.6g, cerium trifluoromethanesulfonate (Ce(OTf) 3 ) weighed 0.35g, put them into a blast drying oven and dried at 80°C for 24h; then put the dried raw materials into a torque rheometer for melt blending, and recorded the torque data, the blending temperature was 170 ℃, rotating speed 80r / min, blending time 10min, prepared LLDPE / C 70 / Ce(OTf) 3 composite material. Its reaction mechanism, sample preparation method and test method are with embodiment 1.

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Abstract

The invention discloses a high-strength polyolefin composite material and a preparation method thereof. The weight percentages of its main components are: polyolefin: 93-99.7%, fullerene: 0.2-5%, and catalyst: 0.1-2%. The present invention utilizes the characteristics that fullerene is easy to carry out free radical addition reaction, adopts a catalyst with strong Lewis acidity, catalyzes macromolecular chain scission reaction, thereby forms macromolecular free radical, and connects with fullerene through free radical addition reaction, without It is necessary to carry out surface treatment on the fullerene in advance, which will not damage the structure of the fullerene itself, and can obtain organic fullerene with high structure retention.

Description

technical field [0001] The invention relates to the surface modification of carbon nanomaterials and the processing and molding of polymer composite materials, specifically a kind of high-strength (tensile strength 47.8) that uses fullerene as carbon nanomaterials and has a rubber-like three-dimensional cross-linked network structure. More than MPa, Young's modulus of more than 1035MPa, elongation at break of more than 110%) polyolefin composite material and its preparation method. Background technique [0002] Carbon nanomaterials such as carbon nanotubes, nanocarbon fibers, and graphene have special chemical structures, large specific surface areas, and extremely high strength and modulus, and are very popular polymer reinforcement materials. However, the large specific surface area and high surface energy of carbon nanomaterials make them easy to agglomerate to form larger aggregates and reach a relatively stable state, which is a thermodynamically spontaneous process. N...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L23/12C08L23/06C08L23/08C08K9/04C08K3/04C08F301/00
Inventor 郭正虹冉诗雅方征平
Owner NINGBO INST OF TECH ZHEJIANG UNIV ZHEJIANG
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