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Regenerative polyethylene plastic where novel cross-linking agents are added and preparation method thereof

A technology of recycled polyethylene and crosslinking agent, which is applied in the field of polymer materials and its preparation, can solve the problems of product crosslinking speed influence, slow water diffusion speed, slow crosslinking speed, etc. Convenience and excellent heat resistance

Inactive Publication Date: 2016-01-20
SHENYANG INSTITUTE OF CHEMICAL TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the non-hydrophilicity of polyethylene, the diffusion rate of water in polyethylene is very slow, resulting in a slow cross-linking speed, and the thickness of the product also has a direct impact on the cross-linking speed

Method used

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  • Regenerative polyethylene plastic where novel cross-linking agents are added and preparation method thereof

Examples

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preparation example Construction

[0026] Preparation of palygorskite silane crosslinking agent:

[0027] (1) Acid treatment of silane cross-linking agent: Add 1 mL of silane cross-linking agent to 5 mL of absolute ethanol, then adjust the pH to 3~3.5 with glacial acetic acid, and stir at room temperature for 1 h.

[0028] (2) Activation of palygorskite: Add 100g of palygorskite clay into 250mL NaOH solution with a mass fraction of 5%, stir magnetically at 45°C for 12h, then rinse neutral with distilled water, centrifuge, and take the filter cake to dry to obtain activation palygorskite, ground for use.

[0029] (3) Preparation of palygorskite silane crosslinking agent: disperse 1g of activated palygorskite in 10mL of ethanol / water mixture (15mL of ethanol, 1mL of water), ultrasonically disperse for 15min, and then add the treated silane dropwise Cross-linking agent (the net content of silane cross-linking agent is 0.005g), add a certain amount of deionized water, stir and react at room temperature for 12 hour...

Embodiment 1

[0036] Set the temperature of the mill to 135~140°C, add 100 parts of processed recycled materials to the double rollers of the mill, add 0.5 parts of antioxidant 1010, and 5 parts of liquid paraffin. After it is melted and covered with rollers, add Palygorskite clay crosslinking agent 3 parts, initiator (BPO) 0.1 part, dicumyl peroxide (DCP) 0.1 part, catalyst dibutyltin dilaurate 0.2 part, water generating agent (HCOONa 2H 2 O) Mix 2 parts for 10 minutes, put the composite material into a flat vulcanizer, and prepare various performance test samples.

Embodiment 2

[0038] Set the temperature of the mill to 135~140°C, add 100 parts of processed recycled materials to the double rollers of the mill, add 0.5 parts of antioxidant 1010, and 5 parts of liquid paraffin. After it is melted and covered with rollers, add Palygorskite clay crosslinking agent 4 parts, initiator (BPO) 0.2 part, dicumyl peroxide (DCP) 0.1 part, catalyst dibutyltin dilaurate 0.3 part, water generating agent (HCOONa 2H 2 O) Mix 3 parts for 15 minutes, put the composite material into a flat vulcanizer, and prepare various performance test samples.

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Abstract

The invention discloses regenerative polyethylene plastic where novel cross-linking agents are added and a preparation method thereof and relates to a high polymer material and a preparation method thereof. A moderately-crosslinked modification technological means is adopted, and the regenerative polyethylene plastic where novel cross-linking agents are added is prepared. Due to the fact that palygorskite clay crosslinking agents are added, silane crosslinking agents are decomposed under a certain temperature to generate free radicals, macromolecules of the regenerative polyethylene plastic are triggered to have a chemical crosslinking reaction, chemical bonds are formed between macromolecular chains, a net-shaped structure is formed, and therefore strength, rigidity, tenacity and heat resistance of the final product are all excellent. The formula of the prepared composite crosslinking agents is applied to crosslinking of waste polyethylene, not only are the mechanical property and the gel content of the waste polyethylene improved, but also combustion resistance and heat stability of waste polyethylene materials are improved, cost of low-density polyethylene materials is reduced, and therefore good application prospects are achieved.

Description

technical field [0001] The invention relates to a polymer material and a preparation method thereof, in particular to a recycled polyethylene plastic added with a new crosslinking agent and a preparation method thereof. Background technique [0002] The scientific and technological progress in the field of polymer materials has driven the rapid development of the world's plastics industry. In recent years, my country's plastics industry has developed rapidly, with many varieties and large output. At the same time, our country has also entered the period of plastic scrapping, and a large amount of waste plastics have been produced. After years of use, the performance of plastics after scrapping has dropped significantly, and they cannot be directly reused, resulting in a lot of waste of plastics. A large amount of plastic waste is a great waste and bad behavior that damages the environment, and it also has a negative impact on human health. Since the invention of plastics, i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/06C08L23/08C08K13/06C08K9/06C08K5/098C08K5/09C08K3/22C08K5/3492C08K3/32C08J3/24B29C47/92B29C48/92
CPCC08L23/06B29C48/92B29C2948/92704C08J3/246C08J2323/06C08J2323/08C08L23/0815C08L2201/08C08L2205/025C08L2205/04C08L2207/062C08L2207/066C08L2207/20C08L2312/08C08L91/06C08K13/06C08K9/06C08K3/346C08K5/098C08K5/14C08K5/1345
Inventor 葛铁军肖尚雄王佳刘浪张瑾
Owner SHENYANG INSTITUTE OF CHEMICAL TECHNOLOGY
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