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Reversible repair functional matrix resin for pultrusion and preparation method of matrix resin

A technology of pultrusion molding and matrix resin, which is applied in the field of reversible repair functional matrix resin and its preparation, can solve problems such as damage, matrix cracking, and broken materials, and achieve the effect of wide application range and excellent processing performance

Inactive Publication Date: 2014-12-10
HAIAN INST OF HIGH TECH RES NANJING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the thermosetting characteristics of epoxy resin, it becomes an insoluble and infusible cured product after processing, and the secondary processing technology is very limited, especially when the pultruded composite material is subjected to low-energy impact during use, the impact point The matrix cracks and micro-cracks appear nearby, and with the transfer of impact energy, the mesoscale cracks expand and accumulate, eventually causing fractures on the interface to form material damage

Method used

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  • Reversible repair functional matrix resin for pultrusion and preparation method of matrix resin
  • Reversible repair functional matrix resin for pultrusion and preparation method of matrix resin

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Add 23 g of 4,4'-o-diallyl bisphenol A and 46 g of epichlorohydrin into a 250 mL four-necked flask equipped with a mechanical stirrer, a thermometer, a reflux condenser, a numerically controlled sampling pump, and a nitrogen gas introduction device, and slowly Raise the temperature of the oil bath to 60°C, and after 4,4'-o-diallyl bisphenol A is completely dissolved, slowly add 64g of NaOH solution (30wt%) with a numerical control injection pump, and the injection is completed within 1 hour. The reaction temperature was controlled at 60°C, and the reaction was continued for 4 hours. After the reaction was completed, the generated sodium chloride was removed by cooling and filtration, and the unreacted epichlorohydrin was removed by distillation under reduced pressure. After removing the solvent, a pale yellow viscous liquid product, 4,4'-diallyl bisphenol A diglycidyl ether epoxy resin, was obtained. Dissolve 30 g of the above-mentioned light yellow viscous liquid produ...

Embodiment 2

[0028] Add 95 g of 4,4'-o-diallyl bisphenol A and 184 g of epichlorohydrin into a 1000 mL four-necked flask equipped with a mechanical stirrer, a thermometer, a reflux condenser, and a nitrogen introduction device, and slowly raise the oil Bath temperature to 65°C, after 4,4'-o-diallyl bisphenol A is completely dissolved, put 80g of NaOH solid into the flask, control the reaction temperature at 60°C, react for 4h, cool and filter to remove the formed Sodium chloride, distilled under reduced pressure to remove unreacted epichlorohydrin, dissolved in toluene again, washed 3 times with deionized water, and removed the solvent to obtain a light yellow viscous liquid product, 4,4'-diene Propyl bisphenol A diglycidyl ether epoxy resin. Dissolve 150 g of the above-mentioned light yellow viscous liquid product in 220 g of toluene and place it in a 1000 mL four-necked flask equipped with a mechanical stirrer, a thermometer, a reflux condenser, a numerically controlled sampling pump, an...

Embodiment 3

[0031]Add 95 g of 4,4'-o-diallyl bisphenol A and 184 g of epichlorohydrin into a 1000 mL four-necked flask equipped with a mechanical stirrer, a thermometer, a reflux condenser, and a nitrogen introduction device, and slowly raise the oil Bath temperature to 65°C, after 4,4'-o-diallyl bisphenol A is completely dissolved, put 80g of NaOH solid into the flask, control the reaction temperature at 60°C, react for 4h, cool and filter to remove the formed Sodium chloride, distilled under reduced pressure to remove unreacted epichlorohydrin, dissolved in toluene again, washed 3 times with deionized water, and removed the solvent to obtain a light yellow viscous liquid product, 4,4'-diene Propyl bisphenol A diglycidyl ether epoxy resin. Dissolve 150 g of the above-mentioned light yellow viscous liquid product in 220 g of toluene and place it in a 1000 mL four-necked flask equipped with a mechanical stirrer, a thermometer, a reflux condenser, a numerically controlled sampling pump, and...

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Abstract

The invention discloses a reversible repair functional matrix resin for pultrusion and a preparation method of the matrix resin. The matrix resin is prepared from the following raw materials in parts by weight: 30-60 parts of 4,4'-diallylbisphenol A diglycidyl ether epoxy resin, 20-35 parts of furfuryl amine, 15-30 parts of 4,4'-bismaleimide diphenylmethane, 0-25 parts of liquid epoxy resin and 5-15 parts of curing agent. The preparation method comprises the following steps: dissolving the 4,4'-diallylbisphenol A diglycidyl ether epoxy resin in a formula amount into a solvent, slowly adding the furfuryl amine into a reaction container for reacting, adding the 4,4'-bismaleimide diphenylmethane, liquid epoxy resin and curing agent, reacting and mixing for a hour, performing reduced pressure distillation to remove the solvent, and cooling. The reversible repair functional matrix resin for pultrusion and the preparation method of the matrix resin disclosed by the invention have the beneficial effects that the matrix resin has good molding manufacturability, the molecular structure contains furan and imide structures, the heating and repairing functions of the prepared composite material can be realized by virtue of a Diels-Alder reversible reaction, and the matrix resin also has the advantages of high strength and high heat resistance.

Description

technical field [0001] The invention relates to the technical field of thermosetting resins and epoxy resins, in particular to a reversible repairing functional matrix resin for pultrusion molding and a preparation method thereof. Background technique [0002] As an important class of thermosetting resins, epoxy resin has excellent adhesive properties, wear resistance, mechanical properties, electrical insulation properties, chemical stability, high and low temperature resistance, low shrinkage, easy processing and low cost, etc. It has been widely used in advanced composite materials and other fields. [0003] Epoxy resin is the most commonly used matrix resin for high-performance composite materials, and can be used as matrix resin for fiber-reinforced composite pultrusion molding process. Due to the thermosetting characteristics of epoxy resin, it becomes an insoluble and infusible cured product after processing, and the secondary processing technology is very limited, e...

Claims

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Application Information

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IPC IPC(8): C08L63/00C08L63/02C08G59/58C08G59/06
Inventor 任华张亚曹婷婷仇叶云
Owner HAIAN INST OF HIGH TECH RES NANJING UNIV
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