Modified ethylene-methyl acrylate copolymer as well as preparation method and application thereof

A technology of methyl acrylate and copolymer, applied in the field of modified ethylene-methyl acrylate copolymer and its preparation, can solve the adjustment of the preparation process of ethylene-methyl acrylate copolymer, the difference and influence of product molecular weight and branching situation The grafting or composite process is effectively carried out to achieve excellent mechanical properties and corrosion resistance, high melting point, and the effect of increasing the number of

Active Publication Date: 2021-08-24
安徽清澜新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the modification method provided by this patent is relatively complicated, and a wide variety of raw materials need to be used, and the products modified according to this method are mainly used in cable sheathing materials. It is necessary to redesign the corresponding modification method so that the prepared modified ethylene-methyl acrylate meets the performance requirements of the reverse osmosis membrane support material
[0004] In addition, the current modification of ethylene-methyl acrylate copolymers is mainly based on the grafting or compounding of existing ethylene-methyl acrylate copolymers, and the preparation process of ethylene-methyl acrylate copolymers has not been adjusted.
However, as a copolymer of ethylene-methyl acrylate, the molecular weight and branching of the product obtained by polymerization under different conditions will have large differences, which will affect the effective progress of the grafting or compounding process, resulting in the actual modification effect not ideal

Method used

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  • Modified ethylene-methyl acrylate copolymer as well as preparation method and application thereof
  • Modified ethylene-methyl acrylate copolymer as well as preparation method and application thereof
  • Modified ethylene-methyl acrylate copolymer as well as preparation method and application thereof

Examples

Experimental program
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Effect test

preparation example Construction

[0029] The invention provides a kind of preparation method of modified ethylene-methyl acrylate copolymer, comprises the steps:

[0030] S1, preparation of nickel complex catalyst;

[0031] S2. Under the action of the nickel complex catalyst obtained in step S1, copolymerize ethylene and methyl acrylate to obtain an ethylene-methyl acrylate copolymer;

[0032] S3. Melt blend the ethylene-methyl acrylate copolymer obtained in step S2 with vinyltrimethoxysilane and di-tert-butyl peroxide according to the first preset mass ratio, and obtain mixture A after drying; Silica nanoparticles are dispersed in the first solvent, and then a predetermined amount of vinyltrimethoxysilane and ammonium persulfate are added to obtain mixture B after fully reacting; then the mixture A, mixture B and dodecylbenzene The sodium sulfonate is melt-blended according to the second preset mass ratio, and the product is placed in water to fully react, taken out and dried to obtain a modified ethylene-me...

Embodiment 1

[0045] The present embodiment provides a kind of preparation method of modified ethylene-methyl acrylate copolymer, comprises the steps:

[0046] S1, preparation of nickel complex catalyst

[0047] Dissolve aniline in dichloromethane, then add trimethyl phosphite and elemental iodine, control the molar ratio of aniline, trimethyl phosphite and iodine to 5:2:1, fully stir the reaction for 10h, then add hydrochloric acid (12mol / L), adding sodium bicarbonate solution and sodium chloride solution successively for extraction to obtain an extraction product; spin-drying the extraction product and dissolving it in tetrahydrofuran, adding n-butyllithium dropwise at 0°C, and fully reacting for 2 hours, Add chlorobis (2-methoxyphenyl) phosphine again, control the mol ratio of extract product, n-butyllithium and chlorobis (2-methoxyphenyl) phosphine to be 1:1:1, after sufficient reaction 10h, to The obtained organic phase is sequentially extracted, concentrated and recrystallized to ob...

Embodiment 2～11 and comparative example 1～3

[0069] Embodiment 2~11 and comparative example 1~3 respectively provide a kind of preparation method of modified ethylene-methyl acrylate copolymer, compared with embodiment 1, the difference is that the corresponding process parameter in each step is changed, The corresponding parameter values ​​of each embodiment and comparative example are shown in Table 1, and the remaining steps and parameters are consistent with those of Embodiment 1, and will not be repeated here.

[0070] Table 1 embodiment 2~11 and the process parameter of comparative example 1~3

[0071]

[0072] The properties of the modified ethylene-methyl acrylate copolymers prepared in Examples 2-11 and Comparative Examples 1-3 were tested, and the results are shown in Table 2.

[0073] The performance of the modified ethylene-methyl acrylate copolymer prepared by Table 2 embodiment 2~11 and comparative examples 1~3

[0074]

[0075]

[0076] As can be seen from Table 2, the adjustment of process paramet...

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Abstract

The invention provides a modified ethylene-methyl acrylate copolymer as well as a preparation method and application thereof. According to the preparation method, the nickel complex catalyst is prepared, and the catalyst is used for efficiently catalyzing the copolymerization process of ethylene and methyl acrylate, so that the ethylene-methyl acrylate copolymer is obtained; then ethylene-methyl acrylate copolymer and silicon dioxide nanoparticles react with vinyltrimethoxysilane, and then blend crosslinking is carried out to prepare the modified ethylene-methyl acrylate copolymer. Through the mode, the structure and the performance of the ethylene-methyl acrylate copolymer can be regulated and controlled by utilizing the catalyst, so that the efficient modification process is promoted; so that the prepared modified ethylene-methyl acrylate copolymer has a high melting point and excellent mechanical properties and corrosion resistance at the same time. The copolymer can be applied to a reverse osmosis membrane supporting material and has relatively high practical application value.

Description

technical field [0001] The invention relates to the technical field of synthesis and modification of copolymers, in particular to a modified ethylene-methyl acrylate copolymer and its preparation method and application. Background technique [0002] Ethylene-methyl acrylate copolymer is a product obtained by copolymerizing ethylene with polar monomer methyl acrylate. It has excellent thermal stability, filling, flexibility, cohesion and good Compatibility, widely used in film, extrusion coating, sheet, molding, blow molding, extrusion and other fields. However, the performance requirements of raw materials in different application fields are not consistent, and it is difficult to completely match the requirements of various fields for ethylene-methyl acrylate copolymers prepared by general methods. Copolymers are modified so that their properties meet application requirements. [0003] For example, the patent with the publication number CN103275383A provides a cable sheath...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G83/00B01D69/10
CPCC08G83/001B01D69/10Y02P20/52
Inventor 楼钱吴立群游军
Owner 安徽清澜新材料科技有限公司
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