PA6-56 copolymerized material and preparation method thereof

Abstract

The invention relates to the field of polymer materials, and discloses a PA6-56 copolymerized material and a preparation method thereof. The PA6-56 copolymerized material is prepared through blend polymerization of liquid caprolactam and a water solution of pentamethylene diamine adipate, wherein the molar ratio of the liquid caprolactam to the pentamethylene diamine adipate is 7:3-9:1. The methodcomprises the following steps: mixing the liquid caprolactam, the water solution of the pentamethylene diamine adipate and other reaction raw materials according to a certain proportion, carrying outstirring in a reactor under the protection condition of inert gas, and carrying out a polycondensation reaction at a temperature of 150-300 DEG C, so as to obtain the PA6-56 copolymer material. According to the invention, PA6 monomer caprolactam is mainly copolymerized with PA56 monomer pentamethylene diamine adipate to prepare the PA6-56 copolymer material, and the material not only has the advantages of high strength, wear resistance, acid and alkali resistance of PA6, but also has better hygroscopicity and dyeability, so that better wearing comfort and more abundant color are provided to the textiles.

Description

technical field

[0001] The invention relates to the field of polymer materials, in particular to a PA6-56 copolymer material and a preparation method thereof. Background technique

[0002] PA6 is an important polymer formed by ring-opening polymerization of caprolactam. It has excellent strength, abrasion resistance, acid and alkali resistance, dyeability and hygroscopicity, so it is widely used in textiles and clothing, engineering plastics and Packaging film and other fields. The Chinese patent with the application number CN201610641369.X discloses a polyamide 6 fiber with both antibacterial and moisture absorption and perspiration functions, including cuprous oxide antibacterial masterbatch and polyamide 6 chips with a weight ratio of 2-10:90-98 , which is prepared by spinning through a special-shaped cross-section spinneret after mixing, melting, and extrusion. The invention also provides a preparation method of the above-mentioned polyamide 6 fiber. The beneficial ef...

Examples

Embodiment 1

[0028] Liquid caprolactam is mixed with an aqueous solution of 80% pentamethylenediamine adipate by mass fraction, the molar ratio of caprolactam to pentamethylenediamine adipate is 9:1, in the reactor under the condition of 240-250℃ and nitrogen protection After 1 hour of reaction, turn on the vacuum pump to remove the excess water vapor escaping from the reactants, keep the pressure of the reactor system constant at slight negative pressure or normal pressure, generally -0.1MPa-0.1MPa is appropriate, and continue the reaction After 10 hours, a PA6-56 copolymer was obtained. After testing, its relative viscosity is 2.37, and its equilibrium moisture absorption rate is 5.1%.

Embodiment 2

[0030] Mix liquid caprolactam with 80% aqueous solution of adipate pentamethylenediamine salt in a closed reactor, the molar ratio is 8:2, in the closed reactor under the condition of 245-260°C and nitrogen protection Stir continuously, turn on the vacuum pump to remove the water vapor in the reactor after 2 hours of reaction, keep the pressure of -0.1MPa-0.1MPa in the reactor, and obtain a PA6-56 copolymer after 12 hours of reaction, and cool the copolymer by extrusion , granulation, hot water extraction and hot nitrogen drying to obtain PA6-56 copolymer slices, the relative viscosity of this copolymer is 2.4-2.7, and the equilibrium moisture absorption rate is 5.3%.

Embodiment 3

[0032] Mix liquid caprolactam with 80% aqueous solution of pentamethylenediamine adipate in a closed reactor, the molar ratio is 8:2, and the total mass ratio of caprolactam and pentamethylene adipate at the same time is 0.3 % of terephthalic acid, kept stirring in a closed reactor at 245-260°C under the protection of nitrogen, after 2 hours of reaction, turn on the vacuum pump to remove the water vapor in the reactor, and keep the reactor at -0.1MPa-0.1 The pressure of MPa, after reacting for 12 hours, the PA6-56 copolymer was obtained. After the copolymer was extruded and cooled, pelletized, hot water extracted and dried with hot nitrogen, the PA6-56 copolymer chip was obtained. The relative viscosity of the copolymer was 2.4-2.7, the equilibrium moisture absorption rate is 5.3%.

technical field

[0001] The invention relates to the field of polymer materials, in particular to a PA6-56 copolymer material and a preparation method thereof. Background technique

[0002] PA6 is an important polymer formed by ring-opening polymerization of caprolactam. It has excellent strength, abrasion resistance, acid and alkali resistance, dyeability and hygroscopicity, so it is widely used in textiles and clothing, engineering plastics and Packaging film and other fields. The Chinese patent with the application number CN201610641369.X discloses a polyamide 6 fiber with both antibacterial and moisture absorption and perspiration functions, including cuprous oxide antibacterial masterbatch and polyamide 6 chips with a weight ratio of 2-10:90-98 , which is prepared by spinning through a special-shaped cross-section spinneret after mixing, melting, and extrusion. The invention also provides a preparation method of the above-mentioned polyamide 6 fiber. The beneficial ef...

Examples

Embodiment 1

[0028] Liquid caprolactam is mixed with an aqueous solution of 80% pentamethylenediamine adipate by mass fraction, the molar ratio of caprolactam to pentamethylenediamine adipate is 9:1, in the reactor under the condition of 240-250℃ and nitrogen protection After 1 hour of reaction, turn on the vacuum pump to remove the excess water vapor escaping from the reactants, keep the pressure of the reactor system constant at slight negative pressure or normal pressure, generally -0.1MPa-0.1MPa is appropriate, and continue the reaction After 10 hours, a PA6-56 copolymer was obtained. After testing, its relative viscosity is 2.37, and its equilibrium moisture absorption rate is 5.1%.

Embodiment 2

[0030] Mix liquid caprolactam with 80% aqueous solution of adipate pentamethylenediamine salt in a closed reactor, the molar ratio is 8:2, in the closed reactor under the condition of 245-260°C and nitrogen protection Stir continuously, turn on the vacuum pump to remove the water vapor in the reactor after 2 hours of reaction, keep the pressure of -0.1MPa-0.1MPa in the reactor, and obtain a PA6-56 copolymer after 12 hours of reaction, and cool the copolymer by extrusion , granulation, hot water extraction and hot nitrogen drying to obtain PA6-56 copolymer slices, the relative viscosity of this copolymer is 2.4-2.7, and the equilibrium moisture absorption rate is 5.3%.

Embodiment 3

[0032] Mix liquid caprolactam with 80% aqueous solution of pentamethylenediamine adipate in a closed reactor, the molar ratio is 8:2, and the total mass ratio of caprolactam and pentamethylene adipate at the same time is 0.3 % of terephthalic acid, kept stirring in a closed reactor at 245-260°C under the protection of nitrogen, after 2 hours of reaction, turn on the vacuum pump to remove the water vapor in the reactor, and keep the reactor at -0.1MPa-0.1 The pressure of MPa, after reacting for 12 hours, the PA6-56 copolymer was obtained. After the copolymer was extruded and cooled, pelletized, hot water extracted and dried with hot nitrogen, the PA6-56 copolymer chip was obtained. The relative viscosity of the copolymer was 2.4-2.7, the equilibrium moisture absorption rate is 5.3%.