Inorganic/organic hybrid epoxy resin reinforcing agent

An epoxy resin and reinforcing agent technology, applied in the field of composite materials, can solve the problems of material heat resistance, hardness, modulus, electrical properties, limited impact resistance and fracture resistance, and high cross-linking degree of epoxy resin. Achieve excellent product performance, improve toughness, improve mechanical properties and thermal stability.

CN104788902AInactive Publication Date: 2015-07-22JIANGNAN UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2015-07-22
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a synthesis method of an inorganic / organic hybrid epoxy resin reinforcing agent. The method comprises synthesis steps as follows: (1) gamma-aminopropyltriethoxysilane (KH550) in a certain proportion reacts with p-TGE (toluene glycidyl ether) with different molar ratios at the room temperature, and p-toluene glyceryl ether-substituted gamma-aminopropyltriethoxysilane (PESi) is obtained; (2) then the PESi is catalyzed by tetraethylammonium hydroxide to have a polycondensation reaction in a mixed solvent of acetonitrile and propyl alcohol, an inorganic / organic hybrid is obtained through synthesis and added to epoxy resin E44, and an epoxy resin composite material is prepared. A benzene ring is introduced into the inorganic / organic hybrid, so that the toughness and the heat resistance of the composite material are improved.
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Description

technical field

[0001] The invention discloses a synthesis method and application of an inorganic / organic hybrid epoxy resin reinforcing agent, belonging to the technical field of composite materials. Background technique

[0002] Epoxy resins are an important class of heat-curing resins and one of the most widely used resins in polymer materials. It has excellent adhesion, wear resistance, electrical insulation, good dimensional stability and chemical stability, and high temperature and low temperature resistance, easy processing and low cost, widely used in adhesives, electronic instrumentation, aviation Aerospace, machinery, light industry, construction, coatings, electrical and electronic insulation materials and advanced composite materials.

[0003] However, the cured epoxy resin has a high degree of crosslinking, which reduces its brittleness and impact resistance, and the heat resistance, hardness, modulus, and electrical properties of the material also decrease at ...

Examples

Embodiment 1

[0024] Embodiment one: a kind of synthetic method of inorganic / organic hybrid epoxy resin reinforcing agent comprises the following steps:

[0025] 1. Make p-cresyl glycidyl ether into a 20wt% methanol solution, place it in a 250mL three-necked flask, and add the calculated amount of KH550 dropwise, according to the molar ratios of KH550 and TGE are 1:6, 1:8, 1 :10, 1:12, and 1:14 were added, mechanically stirred in a constant temperature water bath at 60°C for 3 hours, and then the reaction was stopped. After adding excess tetrahydrofuran, a white precipitate was obtained, filtered under reduced pressure and dried, cooled to room temperature, and reduced After pressure filtration and drying, a white solid was obtained, named PESi1, PESi2, PESi3, PESi4, PESi5, and the yield was 80%-83%.

[0026] 2. Make a mixed solvent of acetonitrile and propanol according to the volume ratio of 1:2, and dissolve PESi1, PESi2, PESi3, PESi4, and PESi5 in the mixed solvent of acetonitrile and p...

Embodiment 2

[0027] Example 2: Preparation of Hybrid Modified Epoxy Resin Composite Material

[0028] The inorganic / organic hybrid epoxy resin reinforcing agent obtained by the method of Example 1 is added to the epoxy resin E44 respectively, and the weight ratio of the reinforcing agent to the epoxy resin is controlled to be 5:100~20:100, Stir to mix the two completely evenly, then mechanically stir in an oil bath at 70°C for 3 hours, add 5-10% of the weight of epoxy resin diethyltolyldiamine as a curing agent, place in an oven at 70°C for 2 hours After the air bubbles are completely removed, pour it into a dumbbell-shaped mold that has been sprayed with a release agent, raise the temperature of the oven to 130°C, and take it out after the material is cured to obtain a transparent composite material EP / PTGE. Run performance tests.

Embodiment 3

[0029] Embodiment 3: Infrared analysis of a kind of inorganic / organic hybrid

[0030] Adopt Fourier transform infrared spectrometer to carry out infrared characterization to the inorganic / organic hybrid obtained by the method of Example 1, and the scanning range is 4000~500cm -1 In the range of wavenumbers, the resolution is 4cm -1 , see attached figure 1 . On the infrared spectrum, 3387cm -1 The absorption peak is the N-H stretching vibration peak. In the spectrum of PTGE, the intensity of the N-H vibration peak weakens in turn, while the peak basically disappears in the spectrum of PTGE5; at the same time, at 1598cm -1 and 1496cm -1 The obvious vibration of the benzene ring skeleton is found at the position, indicating that the epoxy group in p-cresyl glycidyl ether is compatible with POSS-NH 2 -NH in 2 A ring-opening addition reaction has occurred; and the content increases with the increase of the amount of p-cresyl glycidyl ether; while the secondary alcohol is at 1...