Compatilizer for cellulose material reinforced composite material and preparation method for compatilizer

A technology of interfacial compatibilizer and initiator, applied in the field of reactive interfacial compatibilizer and its preparation, can solve the problems of poor entanglement performance of plastic matrix, decrease in molecular weight of macromolecular main chain and high operating temperature, and achieve improved phase Capacitance, the effect of relieving fine cracks, and low reaction temperature

Inactive Publication Date: 2012-09-26
SHANGHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The solution method dissolves functional monomers, initiators, and plastic substrates in a solvent for reaction, which has the advantage of high grafting rate, but it needs to use and recycle a large amount of solvent, and the cost is high; the melting method is extruded by a screw extruder In the process, the functional monomer and the plastic matrix are grafted and reacted, which can be operated continuously in large quantities. However, due to the high operating temperature in the extrusion process, side reactions such as polymer chain degradation are prone to occur, resulting in a decrease in the molecular weight of the main chain of the macromolecule. Deterioration of plastic matrix entanglement in composites
These two traditional methods all have bigger defects, therefore, it is very necessary to study a new reactive interface compatibilizer for composite materials reinforced by cellulose materials, and its preparation method.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Add 20 g of polypropylene into a four-necked flask, slowly dropwise add a mixture of 2 g of glycidyl methacrylate, 2 g of styrene, 0.2 g of benzoyl peroxide, and 2 g of xylene, while blowing in nitrogen gas and stirring at room temperature for 1 hour. Subsequently, at 120° C., the reaction was carried out for 1 hour. After the reaction is completed, use acetone as the extractant and continuously extract in a fat extractor for 24 hours to remove unreacted or homopolymerized functional monomers, then put it in an oven and dry continuously at 100°C for 24 hours to obtain a refined interface Compatibilizer, its grafting rate is 8.509%

[0026] It is applied to the preparation of polypropylene-based composite materials by melt extrusion method. When the interfacial compatibilizer is added at 5% (weight % ratio) and wood flour (60 mesh, water content less than 1%) is added at 40%, the composite material prepared Compared with the commercially available maleic anhydride type ...

Embodiment 2

[0028] Add 20 g of polypropylene into a four-necked flask, slowly dropwise add a mixture of 3 g of glycidyl methacrylate, 3 g of styrene, 0.2 g of benzoyl peroxide, and 2 g of xylene, while blowing in nitrogen gas, and stirring at room temperature for 1 hour. Subsequently, at 120° C., the reaction was carried out for 1 hour. After the reaction is completed, use acetone as the extractant and continuously extract in a fat extractor for 24 hours to remove unreacted or homopolymerized functional monomers, then put it in an oven and dry continuously at 100°C for 24 hours to obtain a refined interface Compatibilizer, its grafting rate is 9.402%.

[0029] It is applied to the preparation of polypropylene-based composite materials by melt extrusion method. When adding 5% (weight ratio) of interfacial compatibilizer and adding 40% of sawdust (60 mesh, water content less than 1%), the prepared composite material is comparable to that on the market. Compared with the composite material ...

Embodiment 3

[0031] Add 20g of low-density polyethylene into a four-necked flask, slowly dropwise add a mixture of 4g of glycidyl methacrylate, 3g of styrene, 0.3g of benzoyl peroxide, and 2g of xylene, and at the same time pass through nitrogen, and stir at room temperature for 1 hour . Subsequently, at 120° C., the reaction was carried out for 1 hour. After the reaction is completed, use acetone as the extractant and continuously extract in a fat extractor for 24 hours to remove unreacted or homopolymerized functional monomers, then put it in an oven and dry continuously at 100°C for 24 hours to obtain a refined interface Compatibilizer, its grafting rate is 7.791%.

[0032] It is applied to the preparation of polyethylene-based composite materials by melt extrusion. When adding 5% (weight ratio) of interfacial compatibilizer and adding 50% of shavings (60 mesh, water content less than 1%), the prepared composite material is comparable to that of the market. Compared with the composite...

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Abstract

The invention relates to a compatilizer for a cellulose material reinforced composite material and a preparation method for the compatilizer, and belongs to the technical field of high polymer material modification. A reaction interface compatilizer is prepared by cografting acrylate monomers, styrene, an initiator, polyolefin, a bonding agent and the like on the polyolefin through a solid-phase grafting method. The compatilizer has the advantages that the grafting ratio of functional monomers on a polymer substrate main chain is high, the functional monomers can form covalent bonds with hydroxyl on the surface of a cellulose material efficiently, and the dispersibility of the cellulose material in a plastic substrate is promoted; meanwhile, the macromolecular main chain has proper molecular weight, can be subjected to chain entanglement with the plastic substrate in the composite material to improve the compatibility, has high melting fluidity, can effectively infiltrate the composite material during processing, is closely meshed at the interface to form an interface layer for effectively transmitting stress and effectively relieves fine cracks generated due to deformation of the material, the mechanical properties and water resistance of the composite material are improved, and the application range of the composite material in various fields is widened.

Description

technical field [0001] The invention relates to a reactive interface compatibilizer for composite materials reinforced by cellulose materials and a preparation method thereof, belonging to the technical field of polymer material modification. Background technique [0002] With the continuous development of polymer science, the quality of polymer materials is becoming more and more diverse. Blending two or more polymer materials or adding various fillers and plastic matrix composites to combine the advantages of the performance of each component can be obtained. Composite materials with better comprehensive properties, this kind of work is attracting wide attention from all parties. However, due to the differences in the properties of different plastic matrices and fillers, such as differences in polarity and surface energy, the compatibility between the components in the composite material is poor, which seriously affects the performance of the composite material and limits...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F255/02C08F220/06C08F220/32C08F212/08C08L23/12C08L23/06C08L97/02C08L1/02C08L51/06
Inventor 俞成丙芮英宇戚文迎
Owner SHANGHAI UNIV
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