Use of methacrylic acid tetradecyl ester-maleic anhydride copolymer

A technology of maleic anhydride and methacrylic acid, which is applied in the field of macromolecular interface modifiers, can solve the problems of no improvement in the impact strength of composite materials, low grafting rate and conversion rate, and increased toughness of composite materials.

Inactive Publication Date: 2007-02-28
TAISHAN FIBERGLASS INC +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Although the preparation of maleic anhydride grafted polyolefins has been widely reported, the grafting rate and conversion rate of maleic anhydride are still very low, and polyolefins are partially degraded during the grafting reaction. The above two methods introduce maleic anhydride grafted polyolefin between the glass fiber and the polyolefin matrix to improve the affinity between the two, which can only partially improve the interfacial bonding of the two phases, and make the tensile strength of the composite material The bending strength and flexural strength were improved to a certain extent, and the introduction of maleic anhydride polyolefin did not increase the toughness of the composite material, and the impact strength of the composite material did not increase

Method used

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Examples

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Effect test

Embodiment 1

[0029] The polymerization reaction was carried out in a four-necked round-bottomed flask, which was connected with a ventilation tube, a thermometer, and a stirrer, and heated in a water bath at a constant temperature of 60°C. Put in 300mL of solvent toluene, put in 60g of maleic anhydride, and start stirring after nitrogen protection for about 30 minutes. When the maleic anhydride was completely dissolved, 75 grams of tetradecyl methacrylate was added, and after the monomers were uniformly mixed, 0.15 grams of initiator AIBN toluene solution was added to initiate the reaction, and the mixture was continuously stirred for 6 hours in a nitrogen atmosphere. The reaction product was precipitated and filtered with methanol, and the obtained polymer product was redissolved in tetrahydrofuran, and methanol was precipitated again to remove impurities. The polymer product is vacuum-dried to constant weight, and the target product of the present invention is obtained.

[0030] The anh...

Embodiment 2

[0032] Using the same method as in Example 1, wherein: 75 grams of maleic anhydride was added, 94 grams of myristyl methacrylate was added, the reaction temperature was 50° C., and the reaction time was 8 hours.

[0033] The anhydride content is 44.2%.

Embodiment 3

[0035] Using the same method as in Example 1, wherein: 90 grams of maleic anhydride was added, and the stirring was started after nitrogen protection for about 30 minutes. After the maleic anhydride was completely dissolved, 65 grams of myristyl methacrylate was added, and the anhydride content was 42.1%. The reaction temperature was 70°C, and the reaction time was 4 hours.

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Abstract

This invention discloses an application of methacrylic acid fourteen ester- maleic anhydride copolymer in glass fiber reinforcing polypropylene composite material. The copolymer is a kind of macromolecule interface modifier, it is painted on glass fiber surface that proposed by coupling agent, then it is combined with polypropylene, and then interface shear strength can be improved, and flexural property of composite material can be improved. The copolymer is flexible boundary layer, it can passivate fracture gap, initiation energy and propagation energy can be enlarged. It can also protect brittleness fiber surface from abrasion in compacting process, cover fiber surface defect, and bring better impact strength.

Description

technical field [0001] The invention relates to a new application of tetradecyl methacrylate-maleic anhydride copolymer, in particular to its application as a macromolecular interface modifier of glass fiber reinforced polypropylene composite materials. Background technique [0002] Due to the advantages of high specific strength, good thermal performance, insulation performance and waterproof performance, glass fiber reinforced polypropylene composite material (referred to as PP / GF) is a type of thermoplastic composite material that has developed rapidly in the field of materials science in recent years. The key to preparing high-performance PP / GF is to improve the interfacial bonding strength between polar glass fiber and non-polar PP, and the incompatibility of polypropylene and glass fiber leads to poor interfacial bonding between the two composites. Therefore, in order to improve the interfacial bonding strength of the two, maleic anhydride grafted polyolefin was introd...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F222/06C08L23/12C08J5/08
Inventor 董擎之周山花高燕王炎涛刘颖刘鑫徐永军戚德海李铁柱
Owner TAISHAN FIBERGLASS INC
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