Separation method of epoxy resin in polyaryletherketone system
A technology of polyaryletherketone and separation method, which is applied in the field of separation and can solve problems such as inability to separate, poor solvent resistance, etc.
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[0058] Preparation method of graphene oxide: The three commonly used methods for preparing graphite oxide at present, namely Brodie method, Staudenmaier method and Hummers method, all use strong acid to strengthen the combination of oxidizing agents to treat graphite. Strong protonic acid enters the graphite interlayer to form graphite intercalation compounds (graphite intercalation compounds), and then the strong oxidant oxidizes graphite to introduce a large number of hydrophilic oxygen-containing functional groups to the surface and edge of graphene to form graphene oxide. Due to the strong hydrophilicity of oxygen-containing groups, graphene oxide can be completely exfoliated and dispersed in aqueous solution.
[0059] In the present invention, the graphene oxide is the product of graphite powder after chemical oxidation and exfoliation. Graphene oxide is a single atomic layer that can expand to tens of microns in lateral dimension at any time. Therefore, its structure span...
Embodiment 1
[0082] The sample is polyphenylene ether containing 10 % bisphenol A type epoxy resin. Weigh 10 g of the sample, dissolve the sample in 50 mL of DMSO, add 2,6-naphthalene dicarboxylic acid and catalyst polyphosphoric acid, keep the reaction temperature at 100°C, and keep the reaction time at 1.5 hours. After the reaction was completed, 50 mL of acetone was added to the solution, and filtered to obtain a filtrate. Acetone was evaporated to dryness with a rotary evaporator to obtain epoxy resin, which was detected by HPLC. The chromatographic system of HPLC was an Agilent 1200 liquid chromatograph, and the chromatographic column was selected from Agilent Eclipse Plus C18. The particle size is 3.5 μm. The mobile phase was 80% tetrahydrofuran (A) and 20% water (B). The flow rate was 0.5 mL / min; the injection volume was 20 μL; the column temperature was set at 40 °C. The detector is a DAD detector.
[0083] The retention time of epoxy resin was 6.532 min. Repeat the above step...
Embodiment 2
[0085] The sample is polyphenylene ether containing 12 % bisphenol A type epoxy resin. Weigh 10 g of sample, dissolve the sample in 50 mL of DMSO, add 1,1-cyclopropyldicarboxylic acid and catalyst polyphosphoric acid, keep the reaction temperature at 100°C, and keep the reaction time at 1.5 hours. After the reaction was completed, 50 mL of acetone was added to the solution, and filtered to obtain a filtrate. Acetone was evaporated to dryness with a rotary evaporator to obtain epoxy resin, which was detected by HPLC. The chromatographic system of HPLC was an Agilent 1200 liquid chromatograph, and the chromatographic column was selected from Agilent Eclipse Plus C18. The particle size is 3.5 μm. The mobile phase was 80% tetrahydrofuran (A) and 20% water (B). The flow rate was 0.5 mL / min; the injection volume was 20 μL; the column temperature was set at 40 °C. The detector is a DAD detector.
[0086] The retention time of bisphenol A epoxy resin was 6.531 min. Repeat above-m...
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