Epoxy resin material used for toughening and reinforcing of hyperbranched polyether type epoxy resin and preparation method thereof

A technology of hyperbranched polyether and epoxy resin, applied in the field of organic polymers, can solve problems such as cumbersome steps, and achieve the effects of wide source, improved toughness and strength, and improved impact performance

Active Publication Date: 2013-02-13
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although there are many preparation methods for hyperbranched polymers in the literature, the steps are often cumbersome and require a two-step method to synthesize

Method used

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  • Epoxy resin material used for toughening and reinforcing of hyperbranched polyether type epoxy resin and preparation method thereof
  • Epoxy resin material used for toughening and reinforcing of hyperbranched polyether type epoxy resin and preparation method thereof
  • Epoxy resin material used for toughening and reinforcing of hyperbranched polyether type epoxy resin and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment example 1

[0043] In a 1000ml four-neck flask equipped with mechanical stirring and a condenser, under nitrogen protection, add 230g E51, 80g trisphenolyl methane, dissolve in 150ml dioxane, add 10g tetrabutylammonium bromide, at reflux temperature Under reaction 72h. After the reaction, pour the reactant into a 2000ml beaker, slowly add methanol to obtain a white precipitate, pour out the supernatant, dissolve the polymer with 100ml tetrahydrofuran, then pour into ethanol / water (8:1), and wash repeatedly. 3 times. The white precipitate was dried to obtain 215g of hyperbranched polyether epoxy polymer with a weight of 7696 and a molecular weight distribution of 2.5. The infrared spectrum of the polymer is shown in figure 2 , 1 HNMR spectrum see image 3 .

Embodiment example 2

[0045] In a 1000ml four-necked flask equipped with mechanical stirring and a condenser, under nitrogen protection, add 230g E51, 80g trisphenolyl methane, dissolve in 150ml dioxane, add 15g tetrabutylammonium bromide, at reflux temperature Under reaction 72h. After the reaction, pour the reactant into a 2000ml beaker, slowly add methanol to obtain a white precipitate, pour out the supernatant, dissolve the polymer with 100ml tetrahydrofuran, and then pour into the methanol / ethanol mixture (3:7), so Wash repeatedly 3 times. The white precipitate was dried to obtain 220 g of a hyperbranched polyether type epoxy polymer with a weight of 14618 and a molecular weight distribution of 3.1.

Embodiment example 3

[0047] In 1000ml equipped with mechanical stirring, in the four-necked flask of condenser tube, under nitrogen protection, add 230g E51, 80g triphenolyl methane, be dissolved in 150ml ethylene glycol dimethyl ether, add 5g tetrabutylamine hydroxide, in Reaction at reflux temperature for 96h. After the reaction is over, pour the reactant into a 2000ml beaker, slowly add methanol to obtain a white precipitate, pour out the supernatant, dissolve the polymer with 100ml tetrahydrofuran, and then pour methanol / ethanol mixture (2:8), so Wash repeatedly 3 times. The white precipitate was dried to obtain 225g of a hyperbranched polyether type epoxy polymer with a weight of 20913 and a molecular weight distribution of 2.8.

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Abstract

The invention relates to an epoxy resin material used for toughening and reinforcing of hyperbranched polyether type epoxy resin and a preparation method thereof. An epoxy resin / hyperbranched polyether type epoxy hybrid material is formed by utilizing bisphenol A linear epoxy resin as a base material, utilizing the hyperbranched polyether type epoxy resin as a superstrong toughening agent and adding a curing agent and an accelerant. The weight of the hyperbranched polyether type epoxy polymer occupies 3-50% of that of epoxy resin. The hyperbranched polyether type epoxy polymer is obtained by utilizing triphenol methane as a first monomer and E51 as a second monomer and conducting one-step combination through a proton transfer polymerization method. Impact strength of the epoxy resin material reaches 35.2kJ / <2>, elongation at break reaches 11%, tensile strength reaches 89.2MPa, bending strength reaches 145.6MPa, and glass-transition temperature reaches 142 DEG C. The performance indexes are greatly improved compared with that of bisphenol A epoxy resin.

Description

technical field [0001] The invention relates to an epoxy resin hybrid material toughened and reinforced by a hyperbranched polyether epoxy polymer, and a preparation method thereof, belonging to the field of organic macromolecules. Background technique [0002] Epoxy resin has the advantages of low curing molding shrinkage, good processability, flexible formulation design, etc., and its cured product has excellent physical and mechanical properties, electrical insulation properties, chemical resistance and bonding properties, and is widely used. Electronic and electrical industry, coating adhesives and composite materials. However, epoxy resin has poor fatigue resistance, heat resistance and impact toughness, and low elongation, which limits its application (LEE, H.; Neville, K., Handbook of Epoxy Resins. Mcgraw-Hill: New York, 1967). [0003] Existing methods for toughening and modifying epoxy resins include: mixing rigid inorganic fillers, rubber particles, thermoplastic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G59/02C08L63/02C08L63/00
Inventor 李效玉罗丽娟孟焱
Owner BEIJING UNIV OF CHEM TECH
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