Self-polymerization fracturing sand modifier based on supramolecular elastomer and preparation method of self-polymerization fracturing sand modifier
A technology of supramolecular elastomers and modifiers, which is applied in the direction of chemical instruments and methods, drilling compositions, etc., can solve the problems of short effective period, storage of modified fracturing sand, inconvenient transportation and feeding, etc., and achieve prolongation Duration, anti-adhesion, anti-reflux effect
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Embodiment 1
[0047] The preparation of the self-polymerizing fracturing sand modifier based on the supramolecular elastomer comprises the following steps:
[0048] (1) Preparation of amide prepolymer: using dibasic acid, unit acid and diamine as raw materials, the amide prepolymer is obtained through polycondensation reaction, and its specific preparation steps include:
[0049] ①Put 0.3mol adipic acid, 0.03mol acetic acid and 0.315mol hexamethylenediamine in a three-necked flask, and the molar ratio of the three is 1:0.1:1.05;
[0050] ②Under the protection of nitrogen, gradually raise the temperature to 200°C, and continuously separate the water generated in the flask;
[0051] ③Insulation reaction for 2h to obtain amide prepolymer.
[0052](2) Preparation of supramolecular elastomer: using amide prepolymer and isocyanate as raw materials, the supramolecular elastomer is obtained through grafting reaction, and its specific preparation steps include:
[0053] ① Take 0.3mol amide prepoly...
Embodiment 2
[0057] The preparation of the self-polymerizing fracturing sand modifier based on the supramolecular elastomer comprises the following steps:
[0058] (1) Preparation of amide prepolymer: using dibasic acid, unit acid and diamine as raw materials, the amide prepolymer is obtained through polycondensation reaction, and its specific preparation steps include:
[0059] ① Take 0.3mol phthalic acid, 0.036mol n-hexanoic acid and 0.33mol p-phenylenediamine in a three-necked flask, and the molar ratio of the three is 1:0.12:1.1;
[0060] ②Under the protection of nitrogen, gradually raise the temperature to 210°C, and continuously separate the water generated in the flask.
[0061] ③Insulation reaction for 3h to obtain amide prepolymer;
[0062] (2) Preparation of supramolecular elastomer: using amide prepolymer and isocyanate as raw materials, the supramolecular elastomer is obtained through grafting reaction, and its specific preparation steps include:
[0063] ① Put 0.3mol amide p...
Embodiment 3
[0067] The preparation of the self-polymerizing fracturing sand modifier based on the supramolecular elastomer comprises the following steps:
[0068] (1) Preparation of amide prepolymer: using dibasic acid, unit acid and diamine as raw materials, the amide prepolymer is obtained through polycondensation reaction, and its specific preparation steps include:
[0069] ① Take 0.3 mol of octadecadienoic acid, 0.048 mol of n-butyric acid and 0.345 mol of butanediamine in a three-necked flask, and the molar ratio of the three is 1:0.16:1.15;
[0070] ②Under the protection of nitrogen, gradually raise the temperature to 220°C, and continuously separate the water generated in the flask.
[0071] ③ insulation reaction 5h to obtain amide prepolymer;
[0072] (2) Preparation of supramolecular elastomer: using amide prepolymer and isocyanate as raw materials, the supramolecular elastomer is obtained through grafting reaction, and its specific preparation steps include:
[0073] ①Take 0....
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