A kind of alkyl-based dynamic cross-linking agent and its application
A cross-linking agent and alkyl-based technology, which is applied in the field of polymer material modification, can solve the problems of difficult practical application of materials, expensive raw materials, low mechanical properties of materials, etc., and achieve good repetitive processing characteristics, improved impact strength, improved The effect of mechanical properties
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Embodiment 1
[0026] Synthesis of alkyl-based dynamic crosslinker DTC7 (heptane-1,7-diylbis(methylazanediyl))bis(2,1-phenylene))diboronic acid):
[0027] Concrete reaction equation is as follows:
[0028]
[0029] The specific implementation steps are as follows: in a round bottom flask, add 2.22g of dibromoheptane, 12.6g of anhydrous potassium carbonate, and then add 300mL of anhydrous chloroform as a solvent. Simultaneously, 10 mL of a solution of (N-methyl) 2-aminophenylboronic acid (3 g) was configured with anhydrous chloroform, and this solution was added dropwise to a chloroform solution of dibromoheptane, under the protection of argon, at 40 Celsius reaction for 16 hours. The product was concentrated by rotary evaporator and purified by reverse phase chromatography. The yield is higher than 85%. The corresponding NMR data of the product are as follows: 1H NMR (500MHz, CD 3 OD): δ7.64, 7.28, 7.18, 6.8, 4.6, 2.97, 2.60, 1.77, 1.42. 13C NMR (125MHz, CD 3 OD): δ133.3, 128.7, 127....
Embodiment 2
[0031] Synthesis of alkyl-based dynamic crosslinker DTC5 (((pentane-1,5-diylbis(methylazanediyl))bis(2,1-phenylene))diboronic acid:
[0032] Concrete reaction equation is as follows:
[0033]
[0034] The specific implementation steps are as follows: in a round bottom flask, add 1.98g of dibromoheptane, 12.6g of anhydrous potassium carbonate, and then add 300mL of anhydrous chloroform as a solvent. Simultaneously, 10 mL of a solution of (N-methyl) 2-aminophenylboronic acid (3 g) was configured with anhydrous chloroform, and this solution was added dropwise to a chloroform solution of dibromoheptane, under the protection of argon, at 40 Celsius reaction for 16 hours. The product was concentrated by rotary evaporator and purified by reverse phase chromatography. The yield is higher than 91%. The corresponding NMR data of the product are as follows: 1H NMR (500MHz, CD 3 OD): δ7.61, 7.27, 7.15, 6.9, 4.8, 3.1, 1.82, 1.45. 13C NMR (125MHz, CD 3 OD): δ136.7, 131.2, 126.1, 124...
Embodiment 3
[0035] The preparation of embodiment 3 reversible cross-linked polyamide 6:
[0036] (1) Preparation of reversible dynamic cross-linked polyamide masterbatch:
[0037] In this example, the alkyl-based dynamic cross-linking agent DTC7 prepared in Example 1 is used as a typical alkyl-based dynamic cross-linking agent for description:
[0038] Add 2% of the antioxidant system (antioxidant 1010:antioxidant 168=1:2) to 1kg polyamide 6, and stir evenly; add 0.2kg of the above-mentioned alkyl dynamic crosslinking agent DTC7 to a high-speed mixer, and Under the conditions, the mixture is fully mixed for 30 minutes to obtain a mixture; the mixture is melted, mixed and granulated in a twin-screw extruder to obtain a dynamic crosslinking agent masterbatch, and the melting temperature is controlled below 280°C.
[0039] (2) Preparation of reversibly crosslinked polyamide 6: in 5kg polyamide 6, add more than 1kg of dynamic crosslinking agent masterbatch, fully disperse in a high-speed mix...
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