Process for the preparation of copolymers and monomers used to form the copolymers
A technology of copolymers and monomers, which is applied in the field of preparation of copolymers and monomers used to form the copolymers, which can solve problems such as the inability to obtain nylon 6, and achieve the effect of improving physical properties
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preparation example 1
[0049] Preparation Example 1: Preparation of N,N'-bis(carboxypentyl)terephthalamide (BCTM) from dimethyl terephthalate and 6-aminocaproic acid sodium salt
[0050] BCTM
[0051]A reaction bottle is provided, and 1 equivalent of 6-Aminohexanoic acid (ACA) and 1 equivalent of sodium hydroxide (NaOH) are added, and an appropriate amount of water is added as a solvent. After two hours of reaction, the reaction flask was heated to remove the water and a solid mixture was obtained. Next, the obtained solid mixture was placed in an oven and dried at 90° C. for 12 hours to obtain 6-aminohexanoic acid sodium salt (6-Aminohexanoic acid sodium salt, ACA-Na) as a solid. Then, 0.97 g (0.005 mole) of dimethyl terephthalate (dimethyl terephthalate, DMT), 2.32 g (0.015 mole) of dried 6-aminocaproic acid sodium salt (ACA-Na) and 20 ml of ethylene glycol (ethylene glycol, EG), placed in a reaction bottle. Next, under nitrogen, the temperature of the reaction flask was slowly raised to 85-9...
preparation example 2
[0057] Preparation Example 2: Preparation of N,N'-bis(carboxypentyl)terephthalamide (BCTM)-(solution Law)
[0058] 3.84 g (0.005 mole) of bis (2-hydroxyethyl) terephthalate (bis-hydroxylethylterephthalate, BHET), 2.32 g (0.015 mole) of dried 6-aminocaproic acid sodium salt (ACA-Na) And 20ml of ethylene glycol (ethylene glycol, EG), placed in a reaction bottle. Next, under nitrogen, slowly raise the temperature of the reaction flask to 85-90°C, react for 14 hours, cool to room temperature, add 20ml of distilled water, and slowly drop sulfuric acid aqueous solution (0.1M) after the solution is completely dissolved. Neutralize to a pH of 6.0. Then, after standing at room temperature for 20 hours, a solid precipitated out and precipitated. The solid was placed in a glass bottle, washed and filtered with 3 times the weight of distilled water, and the steps of washing and filtering were repeated four times, and the washed solid was dried in an oven at 80°C to obtain N,N'-bis( Ca...
preparation example 3
[0060] Preparation Example 3: Preparation of N,N'-bis(carboxypentyl)terephthalamide (BCTM)-(melt Law)
[0061] 3.84 g (0.005 mole) of bis (2-hydroxyethyl) terephthalate (bis-hydroxylethylterephthalate, BHET), 2.32 g (0.015 mole) of dried 6-aminocaproic acid sodium salt (ACA-Na) placed in a reaction flask. Next, under nitrogen, slowly raise the temperature of the reaction bottle to 195-200°C, react for 14 hours, cool to room temperature, add 20ml of distilled water, and slowly drop sulfuric acid aqueous solution (0.1M) after the solution is completely dissolved. Neutralize to a pH of 6.0. Then, after standing at room temperature for 20 hours, a solid precipitated out and precipitated. Put the solid in a glass bottle, wash and filter with 3 times the weight of distilled water, repeat the steps of washing and filtering 4 times, dry the cleaned solid in an oven at 80°C, and analyze it by nuclear magnetic resonance and infrared spectroscopy. , showing that in addition to obtain...
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