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Solidified and modified epoxy resin composition containing side carboxyl hyperbranched polyarylether copolymer, preparation method and application thereof

A technology of epoxy resin and polyarylether, which is applied in the field of polymer material science, can solve problems such as poor toughening effect, poor compatibility, and poor stability, and achieve improved heat resistance and insulation, improved toughness, The effect of excellent comprehensive performance

Active Publication Date: 2018-07-13
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problems of poor toughening effect, poor stability, and poor compatibility in the epoxy resin modification process in the prior art, the present invention uses a hyperbranched polyarylether copolymer containing carboxyl side groups as an epoxy resin enhancer. Toughening agent is used to modify epoxy resin, and the carboxyl side group of hyperbranched polyarylether copolymer is used to react with the epoxy group in epoxy resin to make the two cross-linked and cured, and a kind of thermoplastic material and thermosetting material is obtained. Advantages of cross-linked resins

Method used

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  • Solidified and modified epoxy resin composition containing side carboxyl hyperbranched polyarylether copolymer, preparation method and application thereof
  • Solidified and modified epoxy resin composition containing side carboxyl hyperbranched polyarylether copolymer, preparation method and application thereof
  • Solidified and modified epoxy resin composition containing side carboxyl hyperbranched polyarylether copolymer, preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] Add successively 0.9837 gram (0.0078mol) phloroglucinol, 5.8623 gram (0.0183mol) phenolphthalein, 6.546 gram (0.03mol) 4,4'-difluorobenzophenone, 12.4389 grams (0.09mol) of anhydrous potassium carbonate, 19 milliliters of dimethyl sulfoxide and 21 milliliters of toluene, heated to 140 ° C, after 2 hours, continued to heat up to 175 ° C for reaction 4 Hour. It is diluted with N,N-dimethylformamide, precipitated in ethanol, washed repeatedly with distilled water to remove inorganic salts, and dried to obtain a flocculent product, which is a hyperbranched polyarylether copolymer containing carboxyl side groups.

[0042] The carboxyl-containing side group hyperbranched polyarylether copolymer has a structure of formula (I), wherein

[0043] A is: B for C is

[0044] Dissolve carboxyl side group hyperbranched polyarylether copolymer, bisphenol A type epoxy resin E51 and 4-methyl-hexahydrophthalic anhydride, 2-ethyl-4-methylimidazole in tetrahydrofuran solvent to prep...

Embodiment 2

[0046] Dissolve carboxyl side group-containing hyperbranched polyarylether copolymer (structure shown below), bisphenol F diglycidyl ether, phthalic acid, and tetrabutylammonium bromide in tetrahydrofuran solvent to form a resin solution. Wherein the amount of the curing accelerator tetrabutylammonium bromide is 0.8% of the total weight of the epoxy resin composition. First, pour the resin solution into the mold, put it in a vacuum oven to remove air bubbles at room temperature, heat at 140°C for 1 hour, then heat at 155°C for 3 hours, and finally heat at 195°C for 2 hours. The glass transition temperature of the obtained epoxy resin composition was 130.9°C, and the temperature at the time of thermal weight loss of 5% was 259°C. Compared with before modification, the flexural strength increased by 61%, the flexural modulus increased by 20%, the flexural strain at break increased by 85%, the critical stress intensity factor increased by 32.1%, and the critical strain energy rel...

Embodiment 3

[0049] The carboxyl-containing side group hyperbranched polyarylether copolymer (structure shown below), alicyclic epoxy resin dicyclopentadiene diepoxide and hexahydrophthalic anhydride phthalic anhydride, 1,3,5-triethyl Base-hexahydro-S-triazine is dissolved in tetrahydrofuran solvent, is made into resin solution, wherein the amount of curing accelerator 1,3,5-triethyl-hexahydro-S-triazine is the total amount of epoxy resin composition 0.8% by weight. First pour the resin solution into the mold, put it in a vacuum oven to remove air bubbles at room temperature, and heat at 135°C for 2 hours, then at 160°C for 3 hours, and finally at 200°C for 1 hour. The glass transition temperature of the obtained epoxy resin composition was 130.9°C, and the temperature at the time of thermal weight loss of 5% was 259°C. Compared with before modification, the flexural strength increased by 61%, the flexural modulus increased by 20%, the flexural strain at break increased by 85%, the critic...

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Abstract

The invention provides a solidified and modified epoxy resin composition containing a side carboxyl hyperbranched polyarylether copolymer. The epoxy resin composition mainly comprises the side carboxyl hyperbranched polyarylether copolymer, epoxy resin, a curing agent and a curing accelerator. The invention also provides a preparation method and the application of the epoxy resin composition. Thepreparation method comprises the following steps: mixing the side carboxyl hyperbranched polyarylether copolymer, epoxy resin, a curing agent and a curing accelerator, adding the mixture into an organic solvent, stirring and heating, carrying out procedural warming, mixing the obtained epoxy resin composition with the inorganic matter, and carrying out solidification and mould pressing to preparethe epoxy resin matrix composite material. The tenacity of the epoxy resin composition prepared by using the method is obviously improved, the modulus, heat resistance and insulativity are obviously improved, and the epoxy resin composition has broad applications in the fields of aerospace special type electronic insulation materials, high temperature resistant coatings, laminated boards and advanced composite materials.

Description

technical field [0001] The invention belongs to the technical field of macromolecular materials, and relates to a method for modifying epoxy resin by using carboxyl side group-containing hyperbranched polyaryletherketone. Background technique [0002] Epoxy resin (EP) is an important thermosetting polymer material, which has excellent mechanical properties, electrical insulation properties, high and low temperature resistance, adhesion, wear resistance, chemical stability, and easy processing and molding. With the advantages of excellent stress transfer and low cost, it has been widely used in aerospace, construction, machinery, electronic instruments, light industry, structural adhesives, coatings, electronic and electrical insulation materials, and advanced composite materials. However, due to its high crosslinking density after curing, it has disadvantages such as large internal stress, brittleness, fatigue resistance, heat resistance, and poor impact resistance, which ar...

Claims

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Application Information

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IPC IPC(8): C08L63/00C08L71/12
CPCC08L63/00C08L71/12C08L2201/08C08L2205/05C08L2205/18
Inventor 王忠刚罗世文
Owner DALIAN UNIV OF TECH
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