A reversible repair functional matrix resin for pultrusion and preparation method thereof

A technology of pultrusion 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: 2016-04-20
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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  • A reversible repair functional matrix resin for pultrusion and preparation method thereof
  • A reversible repair functional matrix resin for pultrusion and preparation method thereof
  • A reversible repair functional matrix resin for pultrusion and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0025] Add 23g of 4,4'-o-diallyl bisphenol A and 46g of epichlorohydrin into a 250mL four-neck flask equipped with a mechanical stirrer, a thermometer, a reflux condenser, a numerically controlled sampling pump, and a nitrogen gas introduction device, and slowly increase The temperature of the oil bath is 60°C. After the 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 is controlled Continue to react at 60°C for 4 hours. After the reaction is completed, cool and filter to remove the generated sodium chloride, distill under reduced pressure to remove unreacted epichlorohydrin, dissolve it in toluene again, wash with deionized water three times, and remove the solvent , to obtain a light yellow viscous liquid product, 4,4'-diallyl bisphenol A diglycidyl ether epoxy resin. Dissolve 30 g of the above-mentioned light yellow visco...

Embodiment 2

[0028] Add 95g of 4,4'-o-diallyl bisphenol A and 184g of epichlorohydrin into a 1000mL four-necked flask equipped with a mechanical stirrer, a thermometer, a reflux condenser and a nitrogen introduction device, and slowly raise the temperature of the oil bath 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, and react for 4 hours. After the reaction is completed, cool and filter to remove the generated sodium chloride. Unreacted epichlorohydrin was removed by pressure distillation, dissolved in toluene again, washed with deionized water three times, and the solvent was removed to obtain a light yellow viscous liquid product, 4,4'-diallyl 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 mechanical stirring, a thermometer, a reflux condens...

Embodiment 3

[0031] Add 95g of 4,4'-o-diallyl bisphenol A and 184g of epichlorohydrin into a 1000mL four-necked flask equipped with a mechanical stirrer, a thermometer, a reflux condenser and a nitrogen introduction device, and slowly raise the temperature of the oil bath 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, and react for 4 hours. Unreacted epichlorohydrin was removed by pressure distillation, dissolved in toluene again, washed with deionized water three times, and the solvent was removed to obtain a light yellow viscous liquid product, 4,4'-diallyl 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-neck flask equipped with a mechanical stirrer, a thermometer, a reflux condenser, a numerical control sampling pump and a nitrogen introduction device, and the reaction ...

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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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Patent Type & Authority Patents(China)
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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