Cardanol grafted high-density polyethylene synthesized by reactive extrusion and application thereof in bamboo-plastic composite material

A technology of high-density polyethylene and composite materials, applied in the field of reactive extrusion synthesis of cardanol grafted high-density polyethylene, to achieve the effects of preventing thermal degradation, increasing grafting rate, and low processing temperature

Active Publication Date: 2019-11-22
QUANGANG PETROCHEM RES INST OF FUJIAN NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the shortcoming that reactive extruded cardanol grafted polypropylene uses single DCP initiator to exist, proposes a kind of use composite initiator, keeps the free radical concentration in the screw barrel stable, prolongs reaction time, improves grafting Rate of Reaction Extrusion Method of Cardanol Grafted HDPE

Method used

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  • Cardanol grafted high-density polyethylene synthesized by reactive extrusion and application thereof in bamboo-plastic composite material
  • Cardanol grafted high-density polyethylene synthesized by reactive extrusion and application thereof in bamboo-plastic composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] step one

[0020] After 1g of lauroyl peroxide (LPO) and 1g of dibenzoyl peroxide (BPO) were dissolved in 70g of cardanol, they were added to 1000g of high-density polyethylene (HDPE) resin, stirred at a high speed and mixed evenly, and then extruded with a twin-screw. The extruder (the temperature of the solid conveying section, the melting section, the reaction mixing section, and the melt conveying section of the extruder are respectively 150°C, 160°C, 170°C, and 160°C) is extruded, water-cooled, and granulated to obtain a reactive extruded product. The product cardanol grafted high-density polyethylene (grafting rate 6.82%);

[0021] step two

[0022] After 1000g cardanol grafted high-density polyethylene and 300g bamboo powder are mixed evenly at a high speed, utilize twin-screw extruder (the temperature of extruder solid delivery section, melting section, reaction mixing section and melt delivery section is respectively 150°C, 160°C, 170°C, 160°C) to obtain bamb...

Embodiment 2

[0025] step one

[0026] After 0.1g of lauroyl peroxide (LPO) and 2g of dibenzoyl peroxide (BPO) were dissolved in 150g of cardanol, they were added to 1000g of high-density polyethylene (HDPE) resin. The extruder (the temperature of the extruder solid delivery section, melting section, reaction mixing section, and melt delivery section are 150°C, 160°C, 170°C, and 160°C respectively) is extruded, water-cooled, and granulated to obtain the reaction Extrusion product cardanol grafted high-density polyethylene (grafting rate 4.73%);

[0027] step two

[0028] 1000g of cardanol-grafted high-density polyethylene and 700g of bamboo powder were mixed evenly at high speed, and then hot-pressed at a temperature of 160°C by a hot press to obtain a bamboo-plastic composite material.

Embodiment 3

[0030] step one

[0031] After dissolving 2g of lauroyl peroxide (LPO) and 0.1g of dibenzoyl peroxide (BPO) in 70g of cardanol, add it to 1000g of high-density polyethylene (HDPE) resin, stir and mix evenly at a high speed, and then use a twin-screw The extruder (the temperature of the extruder solid delivery section, melting section, reaction mixing section, and melt delivery section are 140°C, 140°C, 150°C, and 140°C respectively) is extruded, water-cooled, and granulated to obtain the reaction Extrusion product cardanol grafted high-density polyethylene (grafting rate 4.27%);

[0032] step two

[0033] After mixing 1000g of cardanol-grafted high-density polyethylene with 500g of bamboo powder at a high speed, they are extruded using an injection molding machine (the heating temperature is 150°C, 150°C, 160°C, and 170°C from the feed inlet) to obtain bamboo plastic. composite material.

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Abstract

The invention discloses cardanol grafted high-density polyethylene synthesized by reactive extrusion and application thereof in a bamboo-plastic composite material. A method comprises the following steps: a) a step of preparing the cardanol grafted high-density polyethylene, namely a step of dissolving a compound initiator which includes lauroyl peroxide (LPO) and dibenzoyl peroxide (BPO) into cardanol, adding the mixture into high-density polyethylene (HDPE) resin, uniformly stirring and mixing the mixture at a high speed, then performing extrusion by using an extruder, and carrying out watercooling and granulation to obtain the cardanol grafted high-density polyethylene synthesized by reactive extrusion; and b) a step of application of the cardanol grafted high-density polyethylene, namely a step of uniformly stirring and mixing the cardanol grafted high-density polyethylene prepared in the step a) with bamboo powder and plastic at a high speed, and performing extrusion, injection molding or hot press molding to obtain the bamboo-plastic composite material. The cardanol grafted high-density polyethylene prepared by reactive extrusion utilizing the composite initiator has the advantages of stable free radical concentration, low processing temperature, no need of purification of the product and high grafting rate, and can prevent thermal degradation of the bamboo powder when used as a plastic matrix or a coupling agent of the bamboo-plastic composite material.

Description

technical field [0001] The invention relates to a reaction extrusion synthesis of cardanol-grafted high-density polyethylene, which belongs to the technical field of general polymer materials. Background technique [0002] Wood-plastic composite materials have good processing properties, and can be used for sawing, nailing, and planing. Its mechanical properties such as compression resistance and bending resistance are superior to wood materials, and it has excellent water resistance, corrosion resistance and adjustment performance. A new type of composite material that has been booming in recent years. Wood-plastic composite materials mainly use polyethylene, polypropylene and polyvinyl chloride to replace the usual resin adhesives, and mix more than 50% of waste plant fibers such as wood powder, rice husk, straw, etc. into new wood materials, and then extruded It is prepared by plastic processing techniques such as pressing, molding, and injection molding. However, the i...

Claims

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Application Information

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IPC IPC(8): C08F255/02C08F4/34C08L51/06C08L97/02C08L23/12C08L27/06
CPCC08F255/02C08F4/34C08L51/06C08L23/12C08L27/06C08L97/02C08L2201/08C08L2205/03
Inventor 陈钦慧陈登龙林金火钱伟刘金玲
Owner QUANGANG PETROCHEM RES INST OF FUJIAN NORMAL UNIV
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